ML20151L463
| ML20151L463 | |
| Person / Time | |
|---|---|
| Issue date: | 04/12/1994 |
| From: | Paul R, Pawlik E NRC OFFICE OF INVESTIGATIONS (OI) |
| To: | |
| Shared Package | |
| ML20150F728 | List:
|
| References | |
| FOIA-97-180 NUDOCS 9708070010 | |
| Download: ML20151L463 (52) | |
Text
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REPORT OF ?NTERVIEW WITH J. ROGER THOMAS On April 12, 1994, J. Roger THOMAS, General Manager of ICMS, P.O. Box 1, Baroda, Michigan, was interviewed by NRC:01 Senior Investigator Richard C.
l Paul and Eugene T. Pawlik, Field Office Director, 01:RIII. <
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THOMAS stated the following.
He is an insulator / asbestos worker by trade, and began work in the nuclear power field in 1973 as a consultant to American Electric Power while they were constructing the D. C. Cook Nuclear Power Plant (Cook). THOMAS said he oversaw the Brand contract. Brand was the contractor installing fire
, penetration seals at Cook. In 1975 THOMAS said he started ICMS with his father-in-law and obtained a contract to install fire penetration seals at Millstone Nuclear Power Station Unit 1 (Millstone). In September 1975, ICMS contracted to do the fire penetration seal installation work at Cook. THOMAS l
commented that ICMS has worked at about 40 plants installing seals.
THOMAS said ICMS has used Dow Corning 3-6548 silicone foam since 1975, starting with Millstone. ICMS conducted their first successful fire test of the silicone foam fire penetrations in 1976 at Buffalo, New York. The test was done to insurance industry standards, since the NRC did not have i standards or requirements at that time. THOMAS said ICMS was issued an ;
acceptance certificate by American Nuclear Insurers (ANI) or its prede-cessor organization.
THOMAS remarked that he used Dow Corning 3-6548 consistently without problems through the early 1980s for silicone fosm seals. In 1982-1983 at Palo Verde Nuclear Generating Station Unit 1 (Palo Verde), ICMS first started having problems with the foam. THOMAS described the problems as variances in den-sity, voids, and the formation of a " cap" in the seal. THOMAS said the cap was caused by a air pocket which formed in the seal. THOMAS explained that the' seals are poured in several layers, and the air pockets formed at the seam between the different layers. THOMAS said that prior to Palo Verde, ICMS did not have this problem with the silicone foam seals. THOMAS said they had not changed procedures or equipment at Palo Verde. Each applicator had his own unique equipment that was used to mix and shoot the silicone foam into the penetration, according to THOMAS.
Subsequently, ICMS had testing done at Underwriters Laboratories (UL) of the Dow Corning 3-6548 silicone foam fire penetration seals. ICMS built the test ,
article and installed the foam, and THOMAS thought UL wrote the test report.
THOMAS recalled that representatives from Bechtel, the Palo Verde architect /
engineer, and Dow Corning witnessed the test.
Because of the problems at Palo Verde, THOMAS said he contacted Dow Corning about the silicone foam. A Dow Corning representative, Warren FRANKS, went to Palo Verde to inspect the problem. FRANKS said initially that the split-ting of the seal and cap problem were caused by the installation workers perspiring, and the moisture caused the void which formed the cap. THOMAS i l said that Dow Corning never came up with an official cause of the problem and f j
never admitted there was any problem with the 3-6548 silicpn g p. IjMS Case No. 3-93-028 1 9708070010 970724 P t'G E _ /
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filed claims with Dow Corning over the performance of the foam, which were subsequently settled. THOMAS said the settlement resulted in ICMS getting credits for past and future purchases from Dow Corning.
ICMS was doing installation work at other power plants of 3-6548 silicone foam seals and experienced the same types of problems as at Palo Verde.
THOMAS said ICMS conducted their own analysis of these problems and could not determine that humidity, moisture and other environmental factors were the cause. THOMAS said he also did not think the human factor, in the' installation process caused the problems. THOMAS believed, based on his conversations with Dow Corning, that the problems were the result of vari-ances in the base chemicals which made. up Dow Corning 3-6548. THOMAS said that these variances may have been within acceptable tolerances of Dow Corning but could have caused these problems.
THOMAS said the seal defects occurred sporadically and inconsistently. They would get problems in one seal and not others while using the same batch of 3-6548. THOMAS said ICMS repaired the defective seals as they found them.
This Report of Interview was drafted on April 12-14, 1994.
k C d Richard C. Paul Senior Investigator Office of Investigations Field Office, Region III E '
(-(Q V:s f " $
Eugene I. Pawlik, Director Office of Investigations Field Office, Region III Case No. 3-93-028 2
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bec: B. Clark - 069 D.Ellwanger - Atlanta W. Frank - 069 R. Garrett - Dallas DO$ CORNING: R. Hartlein-CO2424 M. Maudlin - Houston
,....- - , J. Haroer - 069 S. Mays - Chicago
" n9,l m = '=~fI.2 N 9-
] E. Rusk - CO2310 B. Miller - Atlanta C. Wolf HT/ file February 16' 1983 (NOTE: This letter was sent to all on the attached Applicator listing.)
Mr. Ralph Block, Manager Fire Safety Division B & B. Insulation, Incorporated P. O. Box 2531 Houston, TX 77001 Mr. Block:
REFERENCE:
DOW CORNING
- 3-6548 SILICONE RTV F0AM You should be well aware of the necessity for extra precau-tions your field technicians have to take when pouring the silicone foam in large penetration openings often found in power generating plants. Based on data generated from extensive internal experiments and additional field obser-vations at power plant construction sites, a Dow Corning team led by Dr. James Falender has developed the attached technical recommendations. If your current field installa-tion manual does not address those points covered in our .
recommendat ions, we strongly suggest you take immediate l actions to revise it so that they will be included.
Please note Items No. 1, 2, 4 and 6 in the recommendations should always be adhered to. Please also note Items No. 3 and 5 are somewhat complementary. When forced to pour the silicone foam under environmental conditions exceeding the temperature / humidity limits set forth in Item No. 3, the j modified installation technique suggested in Item No. 5 should be employed. Under favorable ambient and instal-lation conditions, this method may not always be required.
Should you want to gain ANI acceptance to allow the modified foam installation technique utilized in your own ANI approved sealing systems, please write to Mr. W. Barnhoff of ANI with a copy of the PCA fire test report which is attached to the technical recommendations. ANI is now aware of this method and the equivalency in fire endurance proper-ties of the silicone foam poured either by the regular or modified methods. Rather than issuing a blanket approval '
for the modified method to Dow Corning, however, ANI has t i elected to issue acceptances to individual Ahl license j F.XHIBIT MLI f 3 593 -: 0 2 6 pnet / OF HS P AG E(S) n
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l . Mr. Ralph Block
- February 16, 1983 (
. Page 2 l
holders, upon written request, to allow uses of the modified method in lieu of the documented standard method.
Please feel free to give me a call at any time you need additional explanations or clarifications on the attached technical recommendations.
l Yours truly, ,
s . < ! -
() d/" ' '
H..(Tak) Takahashi Sr. Specialist Technical Service &_ Development DOW CORNING CORPORATION Phone: (517)-496-4664 sk t
Attachments i
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F.XHIBIT N
, PAGE A OF _ P a G r'm I
i-i LIST OF DOW CORNING POWER APPLICATORS i
- 1. Mr. Ralph Block, Manager Fire Safety Division B & B Insulation, Incorporated
-P. O. Box 2531 '
Houston, TX 77001 '
Phone: (713)-686 4 971 4
- 2. Mr. Clayton Brown, President BISCO Construction Group Brand Industrial Services, Incorporated 142.0 Renaissance Drive '
Park Ridge, IL 60068 -
Phone: (312)-298-1200 .
- 3. Mr. Roger Thtmas, President Insulation Consultants and Management Services, Incorporated P. O. Box One Baroda, MI 49101 Phone: (616)-422-2112
- 4. Mr. C. J. Scharrer, Jr. ;
Manager of Construction Insulation Services, Inc.
P. O. Box 7726 Tulsa, OK 74105 j Phone: (981)-749-3161 1
- 5. Mr. Robert Whitfield North Brothers Company Division of National Service Industries 3250 Woodstock Rd., S.E.
P. O. Box 105557 Atlanta, GA 30348 Phone: (404)-622-0541
- 6. Mr. Mike Welch Executive Vice President Tech-Sil, Incorporated I
, 999 Richmond, Suite 106 Houston, TX 77042 l Phone: (713)-783-9000 '
- 7. Mr. Tom Hoff Product Manager !
Insulation Products Division Transco, Incorporated L 55 East Jackson Boulevard
- Cnicago, IL 60604 i Phone: (312)-427-2818
! F.XHIBIT 2.(
r' 'IC J cP 45 eAcets) 1 1
TECHNICAL RECOMMENDATIONS HOW TO MAINTAIN INTEGRITY OF DOW CORNING
- 3-6548 SILICONE RTV F0AM t
Dow Corning's observations of foaming at construction sites indicate that installation technique and environmental conditions have an important effect on foarh quality. As a result of improper installation techniques or extreme environmental conditions, splitting has occasionally occurred within twelve hours, particularly inflarge floor openin D To minimize splitting, we recommend the following:
- 1. Complete and Proper Filler Dispersion - Since age, storage conditions and
, the liquid naiure of uncatalyzed DOW CORNING
- 3-6548 Silicone RTV Foam lead to some degree of filler settlement in each component, complete dispersion of the fillers is essential prior to intended use of the macerial. This filler
)
dispersion is usually accomplished by vigorous stirring and/or drum rolling.
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Whatever method is used, a complete and homogeneous nixture of each component must result. If uncatalyzed components sit longer than four hours after agitation, it should be reagitated prior to use. )
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- 2. Water Contamination - The presence of water droplets may cause i splitting. We advise eliminating all sources of water and strongly recommend -
that the following precautions be taken:
- a. Nucleating air should be dried.
- b. A blow-out of the air hose (to remove condens.ed water) should be performed each morning,
- c. Installers should be extremely careful to avoid having drops of per-spiration fall into the penetration opening.
F.XHIBIT 22 HGE Y OF I45 P AGE (s)
. d. Any condensation formed on any surface of the penetration opening must be thoroughly dried.
- e. Each component should be stored in a container with a proper lid to eliminate accidental inclusion of water and other contaminants.
- 3. Temperature / Humidity - Almost all reported splitting has occurred during ,
the hot part of the summer when ambient temperatures and humidity are high. ,
When pouring large blockouts, you can minimize problems by applying the foam at a temperature below 850F and relative humidity below 60%. l
- 4. Pouring Technique - Incompletely mixed material likely to occur at the beginning or end'of a pour. Since the presence of inw..ipletely mixed I material in the penetratian opening could provide a pocket where gas might collect we recommend starting and stopping the foam pour outside the penetration opening. In large openings, we recommend injecting one half inch layers of liquid and waiting at least 15 minutes between pours.
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Foam installation equipment must be operated under conditions which assure j uniform mixing.
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- 5. d Installation Technique - For large openings having few embedded penetrating items, innovative mechanical techniques to allow escape of gas may give an increased probability of success under unfavorable pouring conditions.
One such method has been investigated by Dow Corning and is described in the attached June, 1982 test report from Construction Technology Laboratories Division of Portland Cement Association, " Fire and Hose Stream Test on Silicone foam Penetration Seals". Foam produced by this method was tested in accordance with the ASTM E-119 test procedures, and performed in identical fashion to foam produced by the presently accepted procedures. The modified foaming technique can help reduce the occurrence of splitting when pouring under adverse conditions. This method and test report has been discussed with s
and sent to Mr. Bill Barnhoff of A.N.I.
F.XHIBIT M _
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PAGE.s5__ or 45 P AGEfS)
- 6. _ Surface Inhibition - Impurities collecting on the surface may cause severe inhibition leading to poorly cured foam. If there is poorly cured foam on the surface, do not pour additional foam on top. Remove poorly cured material and eliminate the source of inhibition before continuing. A low intensity heat lamp will lessen surface tack due to cold temperatures. In addition to poorly l
cured material, you should remove surface dust, contaminants and condensation from the foam surface prior to dispensing fresh material. !
i CONCLUSION
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These suggestions are intended to help minimize your installation problems.
Because applications, conditions and designs are constantly changing there is no one way to solve all application problems. Dow Corning specialists are l available for counseling and additional recommendations, when new or unusual l situations occur.
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EXHIBIT k
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Report to DOW CORNING CORPORATION Midland, Michigan 48640 FIRE AND HOSE-STREAM TESTS ON SILICONE FOAM PENETRATION SEALS by Melvin S." Abrams i
Submitted by CONSTRUCTION TECHNOLOGY I,ABORATORIES A I)ivision of the Portland Cement Association
$420 Old Orchard Road l Skokie, Illinois 60077 June 1982 FXHIBIT _
PAGE 7 OF1 P AGE (S)
FIRE AND HOSE-STREAM TESTS ON SILICONE POAM PENETRATION SEALS by Melvin S. Abrams*
SYNOPSIS
,This report describes fabrication and test procedures and presents results of a fire and three hose-stream tests conducted on two silicone foam penetration seals.' Each of the two pene-l tration openings containing the seals were 30-in. long x 13-in.
wide and were contained in a 4-ft x 4-ft x 1-ft thick concrete-slab. No items penetrated the silicone foam seals.
The purpose of this fire test was to compare the fire per-formance chsracteristics of two silicone foam penetration seals.
One penetration seal was installed utilizing presently practiced methods and procedures. The other penetration seal was installed utilizing a' modified version of presently practiced methoas and procedures. Tnis modified version follows normal 1 practice but utilizes an additional step between pour layers.
p The specimen was exposed for 3 hr to the time / temperature relationship given in ASTM Designation: E119.(1I* Immediately after the fire test, the specimen was removed from the furnace and exposed to three hose-stream tests. The tore tests were
- Director, Fire Research Department, Construction Technology Laboratories, a Division of the Portland Cement Association, Skokie, Illinois 60077
- Numbers in parenthesis designate reference on page 13.
F.XHIBIT ALl PAGE 8 _OF E45 PWr'0 Co!'SituCtiors technology laboratories
- , a 9
8 m conducted in compliance with provisions of IEEE Hose-Stream Test No. I I I, ANI Hose-Stream Test No. 2(3) , and ASTM Designation: E119.III Flamethrough or surface flaming did not occur. during the test. ,
1 Lir* ting unexposed surface temperature rise of 325F, as ]
defindd in the ANI Fire Test Method, was not exceeded.
Both penetration seals passed the three hose-stream tests. !
TEST ASSEMBLY The 4-ft x 4-ft x 1-ft thick concrete slab specimen was f abricated by personnel of the Construction Technology Labora-tories (CTL). Penetration seals were fabricated and installed by personnel of Dow Corning Corporation.
l The two 30-in. long x 13-in. wide rectangular openings in l the test slab fitted over the 32x32-in. fired area of the furnace. Figure 1 shows details of the test assembly. Figures 2 and 3 show bottom and top sides of the assembly prior to tests.
Installation Procedures Information concerning installation procedures for damming and sealant materials are given in the following paragraphs.
Penetration seal numbers correspond to pe,netration numbers shown in Fig. 1.
Penetration Seal Nos. I and 2 l
The two idcatical penetration openings were each partially I
filled with a 1-in. thick ceramic fiber board (Carborundum M HIBIT M i
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i Hotboard) and 9 in. of Dow Corning 3-6548 Silicone RTV foam.
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The fiber boards were press fitted flush with the assembly l i
bottoms, and steel insulation stick pins were inserted. The ;
I 9-in. thickness of silicone was installed in seven pours.
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Penetration 7eal No. 1 was installed as described in Dow l i
Corning Form No. 61-4828-79, included in Appendix A. Pene- F tration Seal No. 2 was installed using the same procedure, l f l
but an approximately 1/8-in. diameter rod was inserted into !
-the foam down to the insulation board and removed. This l' procedure was followed after each pour at the. locations j shown in Fig. 1.
HATERIAL I
! Information concerning materials used in the penetration I l
seals is summarized in the following paragraphs. Additional details are included in Appendix A.
Damming Materials l
l Carborundum Fiberfrax Hotboard is a rigid ceramic insulation board supplied in 2x4-ft sheets, 1-in. thick. This insulation has an approximate density of 21 pcf and is designed for service temperatures of 2300F. The board is used to contain the liquid silicone foam until it is cured to an elastomeric state, and is left in place to add to overall fire resistance of tne assembly.
Detailed product information is contained in Carborundum Form C-739-C in Appendix A.
Silicone Foam i
Dow Corning 3-6548 Silicone RTV Foam is an elastomeric, fire-resistant medium density foam. It is produced by the ,
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reaction of silicone polymers, in the presence of a platinum catalyst, at room temperature. The! material is supplied in A and B components that are combined in a one-to-one ratio, just prior to installation. Detailed product descriptions and application info mation is contained in Dow Corning Form Nos.
61-4828-79, 61-434-78, and 61-32C-82, included in Appendix A.
INSTRUMENTATION Twelve thermocouples were used for measuring temperatures of the penetration seals. For each seal, four thermocouples were embedded in the foam, and two thermocouples were located L on the unexposed surface of the foam. The embedded thermo-j couples were located at 0,3, 6, and 9 in. from the bottom of the foam. A plan of thermocouple locations is shown in Fig. 4.
Details are given in Appendix A.
1 FIRE TESTS The test assembly containing the two penetration seals were subjected to a 3-hr exposure on the slab furnace at CTL. The specimen was placed in a horizontal position. Fire exposure l followed the time / temperature relationship given in ASTM Designation: E119. Furnace temperatures were measured by j i
three thermocouples located in the furnace 12 in, below the
! specimen surface, and were monitored throughout the 3-br test.
A tabulation listing temperatures and variations from those of ASTM Designation: E119 is given in Appendix B. Required temperature measurements were made at 12 different points of i "XHIPIT M_
- -c- _l3 nr 45 PAGE(S) construction technology laboratories i
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Penetration No I 1
6 1,2,3,4 5 X X X Penetration No 2
- 12 7,8,9,10 lI X X X l
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T/C Nos 1,7 - of Bottom of Foom T/C Nos 2,8 - 3in. From Bottom of Foom T/C Nos 3,9 - Gln. From Bottom of Foam T/C Nos 4,10- 91n. From Bottom of Foam T/C Nos 5,6,ll,12 -Unexposed Sur f ace of Foam l l
$ FIGURE 4 THERMOCOUPLE PL AN i i
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the test assembly throughout the 3-hr fire test. Thermocouple i
locations, thermocouple identifications, and recorded tempera- !
tures are also given in Appendix B.
At I hr, the damming board in the southwest corner on the fired side of Penetration No. 2 deflected approximately 1-in.
At 1 hr 20 min, the deflection increased to 2 in. Also, at I hr 20 min, the damming board in the southeast corner on the )
fire side of Penetration No. 1 deflected approximately 1 in.
At 2 hr 40 min, the damming board on the fired side of Penetra-tion No. I fell away trom the seal int o I. h e lutnace.
Flamethrough or surface flaming did not occur during the test. l The limiting unexposed surface temperature rise of 325F, as defined in ANI Fire Test Method was not exceeded.
! l HOSE STREAM TEST After the 3-hr fire exposure period, the test assembly was j moved from the furnace, as shown in Fig. 5, to another location for hose-stream tests. The first test was conducted in accord-ance with the provisions of ICFE 634 Hose-Stream Test No. 1.
The test requires a 1-1/2-in. nozzle, 30 discharge included angle, nozzle pressure of 75 psi, a nozzle discharge of 75 gpm, 1
at a distance of 10 ft, for a period of 14 seconds. l 1
! The second hose-stream test wa3 conducted in accordance !
! I with provisions of ANI Hose-Stream Test No. 2. This test is !
j .: J e n t i ca l to t.he IEEE 634 test except that a 15 discharge j included angle is used instead of a 30 angle. Exposure 4
l- period is 14 seconda.
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I EXHIBIT _ ll PACE f b _ OF '/5 Pact (s)
The third hose-stream test was conducted in accordance with provisions of ASTM Designation: E119. This test requires a 1-1/8 in. Standard Playpipe discharging a solid stream at a f pressure of 30 psi, at a distance of 20 ft for a period of 14 seconds.
Both penetration seals passed all three hose-stream tests. ,
Figures 6 and 7 show the fired and unfired sides of the test !
assembly after hose-stream tests. '
POST-FIRE EXAMINATION When the specimen cooled after the hose-stream tests, it was !
inspected to determine the amount of foam material that burned away during test. Material loss for Penetration No. I was 6-1/2 in. For Penetration Seal No. 2, the loss was 4-1/2 in.
SUMMARY
The test assembly consisting of two penetration seals was exposed to fire for 3 br, and then subjected to three hose-stream tests. The following are significant test results.
l j (a) Flamethrough or surface burning did not occur during l the test.
( b) Li,miting unexposed surface temperature rise of 325F, as defined in ANI Fire Test Method was not exceeded. )
1 (c) Both penetration seals passed all three hose-stream I
I tests.
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J l LABORATORY RESPONSIBI ITY 1 i
- The Construction Technology Laboratories is a Division of the Pcrtland Cement Association and was not involved in the l
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l fabrication of the penetration seals. Personnel of ths i
Construction Technology Laboratories make no judgment of the suitability of the materials or seals for particular end-point uses. Acceptance of the test results for guidance for field installations is '.he prerogative of the authority having l
jurisdiction. ,
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REFERENCES 1
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i 1. ASTM. Designation: E119, Standard Method of Fire Tests of i Building Construction and Materials, American Society for Testing and Materials, Philadelphia, Pa.
l
- 2. "NEL-PIA /MAERP Standard Method of Fire Tests of Cable and l
Pipe Penetration Fire Stops," Nuclear Energy Liability Property Insurance Association," Farmington, Connecticut. I I
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- 3. Standard IEEE 634-1978, "IEEE Standard Cable Penetration Fire-Stop Qualification Test," The Institute of Electrical and Electronic Engineers, Inc., New York, New York.
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APPENDIX A
- 1. Material Information Sheets 1
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t EXHIPIT 2(
COnstrvCloort 19Chnoingy la bo ra tors p;
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. i n Information a30u:
V L
,, J$ t Q Silicone RTV oam ,
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1 DESCRIPTION DOW CORNING'e 3-6548 silicone DOW CORNING @ 3-6548 SILICONE ;
RTV foam is a medium-density. RTV FOAM l two-part product supplied as A and 1 Type. Two-component sihcone l B hauid components. The A . . . .
ccmponent is black and the B component is off-white for easy as ci.reo . Flexibic toam identification and inspection of m.ix. Special Properbes . . Cures at room temperature; reversion When the A and B components are ,,s,stant. noncorrosive, improved fire resistance I
thoroughly mixed in a 1:1 ratio by Primary Uses. . To prepare fire resistant penetration seals either weight or volurne, the product will expand and cure to a TYPICAL PROPERTIES foarned clastomer at room tempera- These values are not intended for use in preparing specifications 1 ture in one to five minutes. Only a i As SUPpfled j mild exotherm of 36 F (20 C) ma46 murra internal temperature rise is Parf A - Physical j 9 exhibited during the curing reaction' CTM 0176 CTM 0097 Appearance .
Specihc Gravity at 77 F (25 C)
Wscosity. Brisokfield Model HAF
. . Black, liquid
. . 1 05 CTM 0050 PATENT POSITION spindle No 3 at 10 rpm. poises. 45 A method of preparing foam CTM 0006 Flash Point, degrees . .. 470 F (243 C) by mixing Part A and Part B CTM 0006 Fire Point, degrees .. .. . .. . > 650 F ( >344 C) of DOW CORNINGe 3-6548 CTM 0787 Sulfur Content, ppm . ... . . . .<2 sihcone RTV foam and the CTM 0787 Chionne Content. ppm . .<4 foams produced thereby are CTM 0787 Bromine Content, ppm. . .
.<5 claimed in Dow Ciarning's CTM 0787 lodine Content, ppm . . <6 U S Patent No. 3.923.705.
Dow Corneng intends to Part A - Electrical' enforce that patent, but wMI CTM 0149 Dielectnc Strength. volts / mil . . .680 CIM O210 Diclectoc Constant,100 Hz :108 of fer licenses thereunder.
11 a hrense is needed, CT M 0210 Dissipahon Factor.100 Hz .0 00103
. 3 23 x 10" i Dow Corning will ship the CTM 0272 Volume Resistsvity. 500 volts DC. ohm.cm products in containers which As Supplied bear a label license and the Part B - Physical j invoice wih include a state.
rnent of the royalty due. CTM 0176 Appearance . .. . . . . Of f-white bquid
. 1 05 Alternatively upon written CTM 0097 Specific Gravity at 77 F (25 C) . . .
request Dow Corning will CTM 0050 Wscosity. Breokfield Model HAF offer a license agreement at a spindle No. 3 at 10 rpms, poises. . .60 compart.ble royalty rate under CTM 0006 Flash Point. degrees . . . . . . 270 F (133 C) which tne licentee may CTM 0006 Fire Point, degrees . . . 390 F (199 C) handle his own accounting of CTM 0787 Sulfur Content. ppm . .<2 royalbes due, regardless of CTM 0787 Chlorine Content. ppm .<4 Bromine Content, ppm. ,<5 the source of material. CTM 0787 ,
CTM 0787 todine Content ppm . .<6 Part B ~ Electrical' cc.
n *.' '
.f.KH,1% Q m egw
'e l', ok cntric t ,,.n. litt. no rh.
,c c,,ns,.n ,, , volts' om ,,.mil y
pAGE &OF M P AGE (S$,.l l"' $5",,, n ,[, ,{ y [43 ,,,,, gg, ,n m ,c , n[,y
j l
USES TYPICAL
. . . . . . . . PROPERTIES . Continued DOW CORNING
- 3-6548 sihcone As Cured - Physical' RTV foam es specially formulated to
. CTM Ot76 Appearance . . . . . . . . Dark grey - black have improved fire resistance elastomere foam properties. As a result,it is ideal for CTM 092A Snap Time', minutes . . . .. . 1.5 preparing fire resistant penetration CTM 0812 ' Density *. lbs/f t' . . .. .. . . . .. .. 17 seats The suitability of CTM 0826 Cell Structure 5. closed cell, percent. . > 50 DOW CORNING? 3 6548 sihcone ASTM D-3574 Tensile Strength, psi . . . . . . . ..... . . . 33.0 RTV foam for wall and floor pene- I CTM 0525 Compression Dc'section. psi tration seals, is evidenced by the I at 20% compre.aion . . . . . . . . . . 5.2 results of Fire Endurance Testing at 40% compression .. . . . . . . . 10.1 as defined in ASTM E 119 73 at 60% compression . . . . . . .. . . . 21 2 (standard for fire tests of building .
CTM 0544 Specific Heat. cal /gm 'C construction and materials). The i 25'C. ... . . .. .. .. .. . . 0.328 matenal successfully withstood 50' C . . . . . . . . . ......... . . .. . 0.336 inree hours of fire exposure. The 75' C . . . . .... . ... . . . . . 0.345 testing was conducted at the 100*C ... .... . . . .. . .. . . . 0.353 National Gypsum Company and 125'C .. .. . . .. . . . . .. . 0.361 witnessed by a representatsve of the 150* C . . . . . . . . . 0.370 Factory Mutual Research Corpora-CTM 0224 Thermal Conductivitya. cal cm/see sq cm
- C . , . 1.8 x 10" tion. A formal report is available by CTM 0740 K Factor' 17 lb/cu ft foam. BTU-in/hr-f t3
- F . . . 0.5 requesting Factory Mutual Report ]
1 CTM 0585 Linear Coefficient of Thermal Expansion. No 26543 from Dow Corning l
(.25 to 150 C). cm/cm
- C . ... . . 3.2 x 10" Corporation. Fire test reports by J CTM 0585 . Volume Coefhcient of Thermat Expansion. Underwriters Laboratories are also '
(-25 to 150 C) cu cm/cu em 'C . . .. . 9.6 x 10" available upon request.
As Cured - Flammability' DOW CORNING
- 3-6548 silicone CTM 0316A Flammability, vertical burn: RTV foam is a UL classified material for use in fire rated pene-T.mo #n hame Aye, age Tame to Aye, age Weight loss. pe, cent tration seals. It also has been seconess Flame. Grow Out seconds assigned a Flame Spread Rating of 15 7.2 1.3 15 when tested in accordance with 60 15.6 13.5 the provtsions of ASTM Designation
. 35 E-84-79A. " Standard Method of CTM 0780 Limiting Oxygen Index. LOI rating. .
.15 Test for Surface Burning Charac-ASTM E.84-79 A Flame Spread Rating' . . . . . . . . . . . ..,, . ..
teristics of Building Materials."
As Cured- Electrical" Details of these tests are similarly ,
CTM 0114 Dielectric Strength, volts / mil . . . . 165 available frorn Dow Corning i CTM 0112 Dielectric Constant 100 Hz . . . 1 95 Corporation.
CTM 0112 Dissipation Factor,100 Hz . . .. .0 00505 11 should be specifically noted that i CTM 0249 Volume Resistivity, ohm-cm . . . ? 24 x 10 not al'sihcone foams have As Cured - Radiation Resistance improved fire resistant properties unnus,,, .c w .
The use of the generic term
( noowe e sono.a.on. r.poso,,
- . mep,avs coms.neu,n,, m, "Sihcono Foam" should be avoided ma.m aas who,. rr.lerencing this product or O M6 0 tim <t.ita. Ihis test data is v.tial only to 50 e3 50
,b thm, prustuct by its sgroitu: eiame 05 2tt O 127 IG 0 .ind numt>cr tiesignahon. viamely 200 16 9 158 ?? fi DOW CORNING
- 3 6548 sihcone 200 Shti resih .nt but itTV foam
, crushed at 12"/" DOW CORNING
- 3-6548 sikcone deflection RTV foam has demonstrate d utikty
- w m, ,. i y.,,o in a variety of other apphcations one pari A inoeungmsy m.ned wiin one pa,t B ano cured at 77 F (25 ci to, os hrs that require sealabihty, improved i i %me to noncou, Condet.on Also inme to beg n foam e.se fire resista* ice insutation against l m...., m.. ,, to. ,in se, ene and cu,ed in mwentp*rd i on'1'ie" hcat and cold, and relatively low I 0,aamanaar mero .w h 'Cenco s, ion memoo toncity.* 11 is particularly usef ul j 'Cu,vd foam sampie in.ckness $ 0 ench y ri .., . o. w.nr ,s ano o,.sc,,,. .nes , coa,,i.acn a n.i* .,e dueo o , siaao.i,a
- ,,. oms..y...m.,...,v,....s.,a..............,,s.-.-,.- : e. . .. o , ~ , ,, _
y ....,,,...i.~....... .. .,..,,,1i,,.., . ... ... . . .. . s.. i., a .~ ,#, ... s .. .. n n. i . .e. ,
...m....~.i4 ..t..,- . . . --,o+*, - r' ' - .,.;i,......~n,,ni,.,,. .ai.,
o,-...i.,,....<,... : ,, .....,,,,sc n, ., ,,
j.-- # l ,. . . , . . ,
-c.-,.......m..... .. vs ....is y,ygip;7r .
Specification writers P; ease contact oow Co,ning Corporation. Midland. Michigan.
before writing specit:ca*.cns on this product .
g] $
- ~, . ,.. . _ -- _ . - . .-
. . 4 .
TYPICAL APPLICATION AND PROPERTY REQUIREMENTS OF DOW CORNING 9 3-6548 SILICONE RTV FOAM Appilcation Requirement Related Property Sealabilit y . . . . . . . . . . . . . . . . . . . . . . . . .. .. . Closed cell structure;
]
Expansion ratio during cure I insulation against hot and cold. .. . .. Thermal conductivity; I K isctor High-temperature stability .. . ., . . - , Thermal aging; Reversion resistance Low temperature stability . , . . . . Stiffening temperature Flame retardancy (cured foam). .. . . Vertical burn; Limiting oxyge l index Flammability of liquid comporents . . . . . Flash point. Firo point T o x icit y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Toxicity of by-products; Toxicity of product Nuclear applications .. . . . .. .. . . . . . . . Radiation resistance; Hslogen content where stability at higher and lower The type or degree of mixing can temperatures is required. A list of significantly affect the cell structure ,
application requirements, and the and density of the final foam l related pertinent properties for product. The introduction of air l which data are or will be available during the mixing action is desirable ;
on DOW CORNINGe 3-6548 to obtain a more uniform cell )
silicone RTV foam,is given in the structure, maximum expansion ratio l l table entitled " Typical Apphcation and volume officiency. Typical '
l and Property Requirements of batch hand mixing will generally
! _ DOW CORNING = 3-6548 Silicone result in a foam density of about 20 0 RTV Foam." -
HOW TO USE*
Ibs/ft'. Batch power mixmg will generally result in a density of about 17 lbs/f t', Automatic mixing, i metering and dispensing equipment. l Mixing with introduction of auxihary air Upon sta.iding, some filler may into the mix. Can s'esult in foam settle to the bottom of the A and densities as low as 15 lbs/f t). Like-the B component containers. To wise, the expansion ratios of foam i insure a uniform product mix, the volume to liquid volume can vary I materialin the A and B containers from 2.5:1 to 4:1 depending on the should be thoroughly mixed prior type and degree of mixing. When to use. cured under significant confinement To properly catalyze and restriction, foam densities q DOW CORNING" 3-6548 sihcone packed as high as 30 lbs/ft' can l l
RTV foam, add a.1 equal quantity of result. For additional informahon on '
Part A with an equal quantity of foaming and quality assurance l . Part B by either weight or volume Procedures. refer to Dow Corning For batch nuxing by hand or power Bulletin No 61482B 82.
l I niin, vigorous and thorough imment; '
. should be maintained for 30 to 60 Cure Rate I
seconds. The mixed product should As supphed and properly mined.
then be quickly transferred and DOW CORNING 3-6548 sihcone poured into the desired apphcation RTV foam has a snap time, or site For larger volume applications. working time, of 1-3 minutes at 77 F the use of suitable automatic (25 C) and 50 percent relative ;
mixing, metering and dispensing hornidity A typical snap time would i equipment is recornmended. be about 1*y minutes The cure rate or snap time as very dependent
' upon the temperature of the A and D co npenen's just before and af ter w ..eu ....c.m.e 3an.su.r.oe.t~
r.mm f n.if are nuiei1 ;d
.........,....,,.....m._,...,....i.
....... ai ......., m c - 4 e., sn- .o m.. e-aiu.es C.psvea..an imac, i J S PMant 3 sa.'.t h e luwer inM 72 F (23 Ca will resuti Iri :7 e'I y '/.5pwm, s
4
- - . .. . - -.= - .- - . . _ - --
j l
4 FIGURE 1: SNAP TIME VS, TEMPERATURE AFTER MIXING 13 _
- q. l 1
n . Temperature, Snap Time, I degrees ,, minutes H -
13 2 32 F (O C) 43 F f6 C) 67 IU ~
72 F f23 C) 15 100 F (37 C)- 03
~
122 F (50 C) 0.25
. 8 -
i F
f6 -
g b -
4 -
.i _______________
t
? -
t I
i ___________....;__.._
' i i I 8
1 li 1 2 0 /0 40 tio go still 110 Temperature.
- F significantly longer cure sates. Adhesion j while temperatures higher than 72 F Upon cunng, DOW CORNING *
(23 C) will result in significantly 3-6548 silicone RTV foam exhibits shorter cure rates. Snap times
! good adhesion to most common faster than one minute and longer substrates. Substrates to which j tan three minutes can resultin a less . good adhesion is not normally j uniform foam cell structure and a obtained include Teflon *, polyethy-lower expansion ratio, When lene, polypropylene and related ambient temperatures exceed the materials. Adhesion to most sub-tange for applying DOW CORNING
- strates can be improved with the use l 3-6548 silicone RTV foam (65 t of DOW CORNING
- 1200 RTV prime i 80 F or 18 to 27 C), the temperature coat. Adhesion to concrete can be j of the A and B components shculd enhanced by using DOW CORNING 9 be adjusted to obtain the specified l
924)23 primer. Good adhesion snap time of one to three minutes cannot be expected to substrates known to inhibit the cure of Repatrobility DOW CORNING
- 3-654f1 sihcorie Once cured in place. RTV foam. l l DOW CORNING
- 3-6548 sehcone RTV foam can be removed with CAUTION relative case, repairs or changes DOW CORNING
- 1200 RTV prime made, and the repaired area coat and DOW CORNING
- 92 023 l
refoamed in place with additsonal primer are flammable. Keep away l product. Since this product from heat and open llame. Use only 1 8 develops good adhesson to itself, the with adequate ventilation. l repaired region will become an j integral part of the original foam Inhibition of Cure l I
Maximum adhesion is obtained , ;
when foaming against a f reshly agents and plasticizers can inhibit exposed foam surface free of dust, dirt. meisture and other ~
Con ta m eria n ts 1,.i.. .s .. a r.mp .
m._' r.,a so wm,vs nt ylr3 q c . of..c .. ;
! = r a5 or G PAGE(S) I i
1
m . _ _ _ _ . _ _ . _ - _ _ . _ . _ _ _ - - ._ _ _ _ _ __ m -
- 1 the cure of DOW CORNING
- recommendations in Dow Corning 3-6548 sihcone RTV foam. The Bulletin No 61-482B-82.
. most notable include: One part by volume of Part A mixed
/
- Organo tin and other organo- with one part by volume of Part B will metalhc compounds release 8.7 parts by volume of a Silicone rubber containing hydrogen gas at S.T.P. For estima-organo-tin catalyst tion purposes, the following formula can be used to calculate
- Sulfur, polysulfides, polysulfones the total volume of hydrogen gas and other sulfur-containin9 evolved from a given weight of the matenals liquid components: 0 0664 x
- Ammes urethanes and omine. (pounds of Part A e pounds of Part contaming materials B) cubic feet of hydrogen gas
- Unsaturated hydrocarbon plasticizers On this basis the explosive hmit of )
oge gas M ak H pered by I If a substrata or materialis question-v lume) would be approached only able with respect to causing e total gas kom one pow of ,
potentialinhibition of cure,it is . rn wem recommended that a small scale e aW e nfined within approximately two compatibility test be run to cubic feet of air. Wherever this ascertain suitability in a given degree of air volume restramt application. The presence of liquid e 5, adequam vedah sM or uncured product at the interface be provided to prevent locahzed between the questionable substrate build-up of gas, and appropriate and the cured OOW CORNING 8 caution should be exercised, 3-6548 silicone RTV foam would indicate incompatibility and l inhibition of cure. CAUTION j immediately upon mixing the A and Gas Evolution B components of DOW CORNING
- Immediately upon mixing the A and 3-6548 silicone RTV foam, a cure
.D B components of DOW CORNING
- reaction takes place that results in 3-6M8 Silicono RTV loam, a cure, the evolution of hydrogp.n agas reactmn takes placu that results en Approprialn cautum shouhl lie the evolution of hydrogen gas lhe exercised Keep away f#om sparks product then cures to an elastomer and flame. Adequate ventilabon in the presence of the evolved gas should be provided to prevent resultmg in a flexible, elastomenc locahzed build-up of gas.
foam.
TOXICOLOGICAL INFORMATION The gas evolution is essentially Toxicological studies indicate completed during the first three minutes af ter the A and B compo. DOW CORNING
- 3-6548 silicone nents are mixed at temperatures RTV foam has an acute oral ALDw of 15 gm/kg body weight in albino between 65 and 80 F (18 and 27 C).
Since the foam is greater than 50 rats. This vafue indicates no significant hazard pertaining to percent closed cell, most of the ingestion of amounts incidental to evolved gas is initially retained in each foam cell, and is not immede-industrial handhng ately released to the surrounding Eye irntation studies soggest that atmosphere Instead,it is telnased this material does not cause over a peood of time by iliffusion sigmficant irritation These results lhe rate of gas release is dependent mdicate hazaf ri lo thi> cyes i3 upon penetration sites, seahng probably nil. Minimal eye peutection designs and ambient temperatures should be adequate for mdustnal handling purposes The amount of gas generated is dependert upon the amount of Addshonally, prolonged or repeated foam used When using skin contact should not produce DOW CORNING" 3-6548 sihcone irritahon There is no evidence that RTV f ua- ta seal large penetration DOW CORNING
- 3-6548 sihcone ripenings care should be e ercisea Rre foam is aosorneo tnroogn tne to aM gn entraprn,fnt and otner O m m acutely toxic amount:i No fuammg poolems by followmg smal hanchr g precautions NPIT
' ' L 3(e_ OF 5 PAGE(S)
, , e appear necessary to use this PACKAGING material saf ely, DOW CORNING
- 3-6548 sihcone Note: Comprehensive data con- RTV fuam is packaged in 8-or,2 ,
cerning the nature of toxicity of 20 ,100- and 900-10 (227-g.1 9 ,
gases from hurrung or smotdenng 45 and 409 kg) kits, not weight DOW CORNING
- 3-6548 silicone RTV foam is not available. However, USERS PLEASE READ it is known that the major decom- The information and data contained position by-products are SiO,, CO,, herein are believed to be accurate CO, N, and some incompletely and reliable; however,it is the burned hydrocarbons user's responsibility to determine suitability of use. Since SHIPPING LIMITATIONS Dow Corning cannot know all of None. the uses to which its products may STORAGE AND SHELF LIFE makes no warranties concerning the fitness or suitability of its DOW CORNING
- 3-6548 silicone RTV foam should be stored in products for a particular use or closed containers at or below 90 F purpose.
(32 C). When stored in the original You should thoroughly test any unopened containers at this proposed use of our products and temperature, the shelf life is 12 independently conclude satisfactory months from date of shipment. performance in your application.
Storage at temperatures lower than Likewise,if the manner in which 90 F (32 C) willlengthen the uselut our products are used requires l'IE governmental approvat or Pnor to use, af ter standing longer clearance, you must obtain it.
than one day, the liquid compo- Dow Corning warrants only that its nents (both Part A and Part B) products will meet its specifica-should be thoroughly stirred to tions There is no warranty of uniformly redisperse any fillers o' merchantabitity of fitness for use, pigments that may have settled not any other exprt ss or emphed warranties The user's exclusive CAUTION merly and Dow Corning). noir The liquid Part B component of habihty is limited to refund of the DOW CORNING" 3 6548 sihcone purchase price or replacement of RTV foam, if contaminated with any product shown to be otherwise strong acids, bases or catalytic than as warranted Dow Corning oxidizing materials, could generate will not be liable for incidental or hydrogen gas. A bulged Part B consequential damages of any kind.
component container may indicate Suggestions of uses should not be hydrogen gas pressurization and taken as inducements to infringe l appropnate caution should be any patents.
exercised. Keep away from sparks l
and flame and supply adequate ventilation to reduce localized i build-up of hydrogen gas.
l l
l l
h
. DOW CORNING CORPORATION 3, oo,yyy, g MIDLAND, MICHIGAN 48640
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,: C P1 OF #5 PAGE(S)
l 3 . l 1 l 1
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Dow Corninc *3-6548 -
1
{
9 Silicone RTV Foam i l
l Color Comparison C1 art l Unacceptable Optimum Color Range Color Range i
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- 2. ..
The cured foam color is too hght in Cured Dow Corning
- 3-6548 Silicone both samples 1 and 2 above. If your RTV Foam should be in the color foam S3mple es in thiS Color range, range shown an 3 and 4 above when check your equipment mix ratio. You properly moted shou',t .1150 check the ot aninal A and D rertai iers as weli a .the equipnient
/i i it c on t.ime ,*! the 3 G548 lii n . , c.imponen' 10 see that the4 filh ai s a'It! pypUet is We're Well de%-
D -
n . n. . . . .......,,,no r.44tNIT M i n.2&_.OF_$_P^Gr'C'
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l Dow Corning
- 3-65L8
> Si icone RTV Foam 4
Cell S:ructure Com aarison Chart i
j Unacceptsble Cell Optimum Cell
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Structure Range Structure Range i...., r.r.
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Tbts cured foam ct'll Sh uCluir' is too Dow Cosmng" 3 0548 Sihcone ItiV larQe and non-unnlonn in both ham- i nam h.th an oplunum Cell sis uchne plesl and 2 above Chetk your cquip- range as shown in 3 and 4 above rnent man ratio.You Should AISO Check when properly cured the temperature of the A.ind B hqtnd Compone its before and af ter mixing a Tnese tempe ature rea.1 ngs should be between 55 F and 60 F and the snap time between 1 and 3 rninutes F f ar c;;' m r.- '
,N F.XHIPIT M r ',i M OF 45 P AGE (S)
l Application Guide ~ ~ ~
D Specifications DOW CORNING @ 3-6548 SILICONE RTV fog,7 .g PENETRATION SEAL SYSTEM - n 30 ce qs enwn l
installer. Any substantial for containment during l PATENT POSITION foaming only and must deviahons from this 1 A method of preparing foam by specification guide shall be be removed from the mixing Part A and Part B of Dow referred to the manufacturer final completed pene.
Corning
- 3-6548 silicone RTV foam or its representative, tration seal system.
and the foams produced thereby are claimed in Dow Corning's U.S. 2.0 MATERIALS / PRODUCTS 3.0 DELIVERY AND STORAGE 2.I Materials shall be manu- 3.I MateriaIs shall be delivered in i ed t r tha p ten , but factured and supplied by, or their onginal, tightly sealed will offer licenses thereunder. If a as supplied by Dow Corning containers or unopened ;
license is needed. Dow Corning will packages, all clearly labeled Corporation, Midland, l ship the products in containers gan M M, M a m n, M w@ N maMactwers name, which bear a label license and the distributor, applicator, or product identification, and tot invoice will include a statement of other approved source, and numbers where appropriate. I the royalty due. Alternatively, upon shall include the following:
written request Dow Corning will 3.2 Dow Corning 3-6548 silicone )
offer a license agreement at a 2.f.! Dow Corning 3-6548 RTV foam shall be delivered j D comparable royalty rate under which the licensee may handle his silicone RTV foam -
Penetration fill material in two component kits containing a Part A and own accounting of royalties due, - comprising liquid Part B component in each kit.
regardless of the source of component Part A 3.3 Materials shall be stored out material. (Black) an"1 liquid of the weather, in their componerit Part B (off- original, tightly sealed j GENERAL white)- containers, or unopened ' i The following application guide 2. f.2 Dow Corning
- 96-081 packages, as recommended specification is provided for the RTV Gicone adhesive by the manuf acturer convenience of the architect /speci* sealant - caulking for 4.0 CONTRACTOR fier small c racks and adhesive for flexible 4 i Foam and damming shall both lt is recommended that the detailed penetration seal system be boot lap-seals- be apphed by a competent specified with the penetration seal 2. f.3 Mineral fiber board, contractor or applicator, system installer under a separate mineral fiber matting. 4 2 Contractor of applicator shall document. and mineral fiber putty be responsible for selecting
- forming and damming and supplying alllabor and 1.0 SCOPE materials used to supervision as well as I f.f This specification guide contain the liquid 3-6548 furnishing all materials l covers the application of Dow mixture prior to and required to complete the job i Corning 3-6548 silicone RTV during foam-filling satisfactorily in accordance l foam in penetration seat penetrations - fire with the written specifications.
systems for new building tested and functionally constructions or in sealing approved forming 5.0 PREPARATION AND and upgrading the capabilities materials can be left in DAMMING of older existing build.ng place to become an 5 i See Architectural Details structures integral part of the Section for typical floor and foamed penetration seal wall penetration seal systems D The key items in this guide shall be incorporated in the 2 I J Plywood sheet. particle 5 7 Penetration seal preparations
]
detailed specificahon covering tsuard. or other shallinclude use el the apphcation and quahty control combushole forming procedures tecr.rwom and procedures of the selected ma:erials . - forming and quht, contrc, stamrcs penetrahen seat system d.'i .msng materials used I.st.c .n tne s:e'icaton
l
. 5.3 Preparation shallinclude but silicone RTV foam mixture shall be added to not be limited to: Part A and Part B, shall be insure that the penetration 5.3.7 Removing allincidental thoroughly agitated by opening is completely filled combustible materials stirring or recirculation and tightly sealed with the and loose impediment in order to redisperse cured foam elastomer.
from the penetration any solid filler or B.6 After a foam penetration seal opening and involved pigment that may have has been installed, a minimum surfaces. settled during storage or of 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> shall be required 5.3.2 Removal of free liquids 9' before any damming forms an f our - are removed or the cured or oil from all involved surfaces and penetra9n 7.2.3 The Part A and Part B foam is trimmed.
components. liquid components of 6.7 After a minimum of 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, 5.3.3 Installation of the the final en tration seal shall t o ough y b en e in a " ' " ' ' '
specified dammin9 one to one ratio by materials to accomadate either weight or volume
- and insure the proper Should an area of non-tight thickness / fire rating 7.2.4 Automatic m,a ing and seal exist, the affected area requirements and dispensing equipment shall be injected with freshly provide containment shall be checked a applied 3-6548 liquid mixture during foaming. minimum of once daily and foamed to insure a tight (prior to start up) to seal.
5.3.4 Removal of all ensure a proper ratio combustible dammin9 balance and thorough 9.0 RETROFIT AND materiets or materials mixing. MAINTANENCE not intended for the final foam penetration seat 7.2.5 A four step, in-line 9. I Changes, modification, repairs system, quality control check to damaged foam, removal of (see Table 1) penetrating components, or 6.0 PRIMING shall be r?,ade at addition of new penetrating least once daily, or component can be readily 6.1 Priming of surfaces and made to existing foam upon changing to a penetrating components is penetration seals. The cured new lot of material to usually not required since the elastomer foam can be easily ensure the performance 3-6548 foam develops removed or poked-thru and of both dispensing considerable compression and equipment and foam refoamed and sealed with the forms a tight mechanical seat product prior to injection of freshly mixed when property installed. 3-6548 liquid components installing penetration 7,0 FOAM MIXING AND 10.0 CLEAN UP D SPENSING EQUIPMENT 8.0 FOAM INSTALLATION
- 10.f A high-flash mineral spirit B f Properly mixed and dispensed solvent is recommended for 7.f Material may be hand mixed Part A and B liquid mixture clean up of the 3-0548 Part A so as to conform to the 4 step and B hquid components shall be added (injected) into qual,ty control procedure a pr perly I rmed and 70.2 The cured foam can be cut listed in Table 1.
dammed penetration opening and trimmed with a sharp 7.2 Specific equipment handling producmg a tight foamed-in- knife or blade, and operating procedures place penetration seal, shall be as specified in the . .
103 Application and mixing 8.2 The 3-6548 liquid mixture equipment shall be in good, foam applicators quality shall not be conbnuously clean operating condition.
control and operating adde f r a time interval Daily cleaning of the mixing procedures manual. These I and dispensing gun procedures shallinclude but easured snap time (three assemblies is 2ssential.
not be limited to,*
minutes maximum). 704 Upon completion of all work 7.2.7 Dow Corning 3-6548 .
8 3 Smaller penetrats.on openmgs covered in the specification, sil RW W can often be completely foam i Part A and Part B shall be the appiscatorhnstaller shall l used as supplied by the sealed with one shot remove all equipment, applications material and debos leaving manuf acturer. Outside ingredients should not 8 J Larger penetration openings the area en an acceptable and be added unless their may require several separate undamaged condition specific misture has shots Each shot shall be
' been Qualified with given a minimum of fif teen 11.0 SAFETY REQUIREMENTS f appropriate testing nunutes cure time before the ,,,g yg y 7 2 2 Prior to use, containers s is am RTV foam Pad A am: O IM of Do* Corning 3-6548 8 5 Sutt.c.ent tiquid 3-6548 components a nr: un:,vn F,XHIRIT eLI
' ' '"i 3 l OF N PAGE$)
t volatile solvents. Toxicological using any cleaning solvents. for applying 3-6548 foam (55 l"
i testing of the liquid components of their Cured 12.0 GUARANTEE AND to 80 F), the temperature of the Part A and B hquid mixture does not suggest any LIMITATION components should be significant hazard incidental to 72.7 Dow Corning Corporation adjusted to obtain the industrial handling- warrants that each quantity of specified snap time of one to Minimal eye protection should Dow Corning 3-6548 silicone three minutes.
be adequate, however safety RTV foam product or Dow 72.4 Special openings or glasses with side shields are Corning 96-081 RTV silicone clearances less than % inch recommended for industrial adhesive / sealant product may be difficult to enter with environments. Masks or dehvered shall be the kind typical 3-6548 dispensing respirators should not be designated or cpecified by it, equipment. Fire tested and required for normalindustrial and no other warranty (except approved elastomeric cautking handling purposes, by title) shall be applied. materials. such as Dow 12.2 Certain chemicalingredients Corning 96-081 RTV silicone If.2 Spills of the liquid 3-6548 in some synthetic materials or adhesive / sealant should be Part -A and B components can substrates can inhibit or used in heu of the foam for become extremely shppery.
temporarily retard the cure of small openmgs.
Sawdust should be immediately applied to any 3-6548 foam resulting in a 12.5 This specification guide does liquid spilt for temporary rehet tacky surface at the involved not cover all construction and the spill removed with interface. Complete cure details for foam penetration high flash mineral spirits. usually results af ter several seal systems Shop drawings days. A small scale showmg proposed damming f f.3 CAUTION: Due to the c mpatibility test is materials, anchorage and evolution of hydrogen gas re mmended when sustability fastenings will be required.
during foaming and curing ' P "' "
PPD 12.6 Openings to be sealed on appropriate caution should be
'5" "M '
exercised. Dow Corning 8" 8
'8Y'd .
" 8 '"'
- traffec surfaces could be 3-6548 silicone RTV foam hazardous If foam sealed should be mixed and apphed # 8 V fo in orm son ee **
away from sparks or open Form Number 61-3200-77.
9 flame. Special forced air ventilation shall be provided if areas of installation have less 72.3 When the ambient temper-ature exceeds the range ideal I'nishing plates with appropnate anchorage must be installed.
than two cubic feet of free air space per pound of hquid mixture being foamed.
f f.4 CAUTION: On direct contact. TABLE 1: FOUR STEP OUALITY CONTROL REQUIREMENTS FOR Dow Corninge 96-081 RTV CHECKING DOW CORNING 3-6548 SILICONE RTV FOAM AND DISPENSING silicone adhesive / sealant EQUIPMENT srritates eyes in caso of eye 1 Snap Time, minutes 13 contact. flush immediately 2 t ree Foam Density. Ibs/fl' 14 20 with plenty of water and 3 Color Chart Comparison. '
. consult a physician. Avoid (Dow Corning Form No 61-337) Pass prolonged or repeated skin 4 Cell Structure Chart Comparison, contact. (Dow Corning Form No 61-339) Pass f f.5 Consult the manufacturer's safe handhng procedures for the specific mineral fiber dammmg materials or other penetration forming matenals TABLE II: SUGGESTED GUIDE FOR DESIGNING MINIMUM PENETRATION used THICKNESSES FOR DESIGNATED FIRE RATINGS 1 f.6 Coveralis, safety shoes and (Data extracted from results of several large scale E-119-76 f[re tests of gloves are recommended for different Dow Corning 3-6548 sehcone RTV foam penetration seal systems in applicator / installers. Hard both floor and wall test structures.)
hats. safety belts and other fire Rahng
~~
- auxiliarly safety equipment i 3 hour3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> r 2 mr l may of ten be required to g gg g, g g, g
, satisfy specific area
! requirements Thickness of Dow Corning 3-6548 ic ne foam abne 4 inh Bin h Mm@c 7f 7 foliow all label directions
! concerning tammability, wnblatm aad any other safe fire approved damming materia! 3 inches 4 mt% 9 erghes hanc1hng procedures when F.XHlolT M 3 2 - . O ,, . ~.
.c
- FIGURE 1: 5. NAP TIME VS. TEMPERATURE AFTER MIXING l
13 -
Temperature. Snap Time.
,, _ degrees _rninutes
- 32 F 10 C) 13 2 il 43 F (6 C) 67 10 - 72 F (23 C) 15 100 F (37 C) 03 9 - 122 F tSO C) 0 25
$8
=
.5 E 7 -
ei f6 a
- 5 -
m 4 -
3 1
2 - 1 I
I -____J_ I i 8
t et 1 ,C t t 40 60 80 100 820 0 20 Tempereture. *F FIGURE II: HYDROGEN EVOLUTION w
8-7- Results after snosong i Part A woth 1 e Part B by volume
{ Total Accumulated 0~
H.' Gas Evolved yZ e inme. At S T P parts by volumo E5
- a b~ .monute.s.
1 09 pg 5 >>
m- 4_ to to Om 20 20 42 60 48 3o ~
95 63 hI 120 67 2 200 7.5 w
2- e 240 78 270 80 340 84 1
400 85 500 87 l 0 g l l l y
l 0 100 200 300 000 SN j Time. minutes F.XHIPIT M
~ m N _ OF N3 P AGE (S)
. ,e . r-,u,e m
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ARCHITECTURAL DETAILS t
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- 3. mineral composition 5 ),' ',. f f. g board ,
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MIDLAND, MICHIGAN 48640 o_ co,,,,, .. . .. .,.. ,. ...., o, oo. c o.e.e . co,n, .i. e
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SREO This spec-Data sheet conforms
} to editorial style prescribed by l The Construction specificat#ons institute, The manufacturer is re.
i aponsible for technical accuracy.
- 1. PRODUCT NAME compatible with certain materials, radiation.
Two-part foamed silicone e,as. chemicals, curing agents and plas- 6. Applications requiring high tomer: Dow Corning
- 3 6548 ticiters that can retard or inhibit the dielectric foam material.
Silicone RTV Foam. foam's cure.These include: 7. Automatic mixing / dispensing
- 2. MANUFACTURER
= OrganoW n ad omer equbment avaHaus.
organo metallic compounds A. Cure Rate-Properly mixed, Dow Coming Corporation
- Silicone rubber containing Dow Corning 34548 Silicone RTV Midland, Michigan 48640 organo tin catalyst Foam has a working time or " snap Phone:(517)496-4000
- Sulf ur, polysulfides, time" of between one and three e po!ysulfones and other sulfur. minutes at rocm temperature
- 3. PRODUCT DESCRIPTION containing materials 3 (typically 1.5 minutes). Temper. !
Dow Corning 34548 Silicone RTV e Amines, urethanes and ature of the mixed components
$ Foam is a medium density, two-part amine-containing materials (not the ambient temperature) is a 3 silicone f oam product. lt is supplied
- Unsaturated hydrocarbon major factorin determining the cure j in A and B tiquid components, col- plasticizers rate. Liquid mixture temperatures i ored for easy identification. When components A and B are mixed A small scale compatibility test lower than 72*F (23*C) will result in is recommended when suitability to significantly longer cure rates; IlL thoroughly at room temperature, a given application is in question. l N., the material will expand and cure to C. Composition and Maferial-temperatures higher than 72*F (23*C) will result in shorter cure
[a '
i a foamed elastomer having im- Dow Corning 3-6548 Silicone RTV rates. (Figure 1-snap time vs c '
I$H proved fire-resistant properties. Foam is a medium density silicone temperature af ter mixing) E A. Basic Uses-Because Dow l foam. It is a two-part product of A Dow Corning 34548 Silicone RTV E !
Corning 3-6548 Silicone RTV Foam and B liquid components, color. Foam will cure in deep sections, 5 i is specially Iormulated to have im- coded for easy identification. The and produce only a minor exotherm.
proved fire resistant properties, its components are mixed in 1:1 ratio It will not revert at high temperature
(
E
)l 5R cell structure makes it excellent for preparing foamed in place fire at room temperature and cure to a dark gray black elastomer foam.
or high humidity conditions, and has been continuously aged for one xg h !
i >. stops and penetration seals. It is year at 220*C without significant G:
Q i
particularly usef ul where stability at extreme temperature is required.
- 4. TECHNICAL DATA Dow Corning 34548 Silicone RTV change in the basic elastomeric properties.
gc
) Areas of suggested potential use Foam has the stability required for The cured foam can be removed
)
y include thermal insulation, cush- use in the following applications:
h and repaired with relative ease. The j j ioning, sealing, ablative protection 1. Penetration seals and repaired area can be re-foamed in 5 and sound absorption, fire rated walls and floors place with additional product, and "'%
) Speelfle uses include: 1. Sealing (tested per ASTM E 119 76). become an integral part of the
- 'c gaps and holes in walls, ceilings Easily removed and re- original f oam. Structural integrity is
$ and floors through which conduit, paired-Retrofit f oam excellent. Upon curing, the foam wire and cable, ductwork and pip- adheres integrally to original will adhere to many common sub- l I t
ing must pass, 2. Confining such foam. strates, and can provide excellent r l hazards as fire, smoke and escap. 2. Thermoset cure elastomer- fire and water seals due to the crea- :
Ing chemicals and gases, and, 3 does not melt or sof ten at tion of a tight compressive or {*
Proper sealing of buildings and high temperatures, mechanical fit even without rooms against dirt, dust, water and Direct outdoor and U.V. ex. substrate adhesion.
other contaminants. posures. Substrates to which it will not Dow Corning
- 3 6548 Silicone 3. Resilient elastomer-foams adhere include Teflon * , poly-RTV Foam is approved to meet the and cures to give a tight com- ethylene, polypropylene and related requirements for use in the con. pression fit, materials. Substrates known to in-struction of nuclear power plants Areas requiring low toxicity hlbit the curing of , Dow Corning and their safety control systems. It and low exotherm during 34548 Silicone FITV Foam cannot l is a UL classified material. Other handling and cure. be expected to adhere satisfactori.
l ratings include HF.1 according to 4. Ability to foam-in place and ly.
l UL94 and a class I flame spread by fill complex geometrics. High ASTM E 84 77. and low temperature ex-gg g
, S. Limff allons-Dow Corning tremes(+ 200*C lo 55'C). A. Preparation of Mixture-
) 3 6548 Slhcone RTV Foam is not 5. Solventless formulation-no Components A and B must be volatile or flammable solvents thoroughly mixed in a 11 ratio h to contend with. (weight or volume) es descrited in i
eM m 'i 7 eM .*N.N.nl*:Ta w :. es= 4.u.g g
.a er in, Nectear power plant en. Dow Corning Form No 6 ? 3EB 77.
i i%.. w.,4.n en u. sasi.svie, sac un.as vircnments and areas of high Batch mixing, by hard er pcwer
'q p,tmlT k 072Cc 30 n=35_enot(s)
4 mix, should be vigorously msin- sp ci 1 handling priccutions era baco ie en intsgt:1 part of ths tilnid for thirty seconds. Auto. nreasstry to ssfaly uss Dow Corn- original mixture. ,
4 matic metering, mixing and ing 3-6548 Silicone RTV Foam and
=
dispensing equipment is recom- its components. Repeated and pro- 9. TECHNICAL SERVICES mended for large volume applica. longed skin and direct eye contact Complete technical information tions. The mixture should be quick. failed to produce irritation. Inges- and literature are available from ly trensferred and poured into the tion of amounts incidental to in- authorized Dow Corning distrib-desired application site. dustrial handling posed no signifi- utors. Laboratory facilities, tech-i The average time the mixed com- cant hazards. Due to the evolution nical service and a list of distrib-ponents will remain liquid (snap of hydrogen gas during curing, ade- utors are available from Dow Corn-time) is 1.5 minutes at room tem, quate ventilation is recommended, ing, perature. Optimum cell structure and material should be mixed away and foam uniformity or efficiency from sparks or flame. 10. FILING SYSTEMS (volume, rise) is achieved when 6. AVAILABILITY Spec-Data il.
snap time is maintained betw in Specifications and application in-one and three minutes. Heating or A. Avallabif.ty-Dow Corning structions are available upon re-cooling the A and B components 36548 Silicone RTV Foam is quest. Contact Dow Corning for can be used to adjust snap time marketed through distributors specific application information, under extreme ambient conditions. throughout the United States, it is desirable to introduce air into Canada and Europe. Contact Dow p p .
the mixing process to obtain a more Coming fodocation nearest to yom -
unitorm cell structure, maximum 7. GUARANTEE
- ' #*P" E * ' ""
- expansion ratio and volume effi- mixing Part A and Part B of Dow 1 ciency. The same source of air can Dow Corning Corporation war- Cornmg* 3-6548 Silicone RTV be used to surge the mixing head rants that each quantity of 3-6548 Foam and the foams produced during shut down, eliminating the Silicone RTV Foam product de- thereby are claimed in Dow Corn-need for costly and difficult to livered will be the kind designated ing's u.S. Patent No. 3.923,705. ,
maintain solvent flush systems. or specified by it, and no other war- Dow Corning intends to enforce tanty (except of title) shall be im- that patent, but will offer licenses Batch hand mixing generally plied. thereunder, if a license is needed, results in a non-confined or free- Dow Corning will ship the products foam density of 20 lbs/ft'; batch 8. MAINTENANCE power mixing similarly yields an in containers which bear a tabel Dow Corning 3-6548 Silicone RTV license and the invoice will include average density of 17 lbs/ft8 With ,
automatic mixing, metering and Foam has a closed cell structure of a statement of the royalty due. <
greater than 50%, which provides Alternatively, upon written request dispensin0 equipment, and the in- excellent air and water tightness. Dow Corning will offer a license i
troduction of air into the mixture. Once the foam is cured and in tigreement at a comparable royalty the free foam density can be as low place, there are virtually no rate under which the licensee may as 151bs/f t'. maintenance requirements. Should handle his own accounting of S. Precautions--Toxicological repairs be necessary, additional royalties due, regardless of the !
studles indicate that no significant product can be re foamed to source of materlat.
FIGURE 1: SNAP TIME VS. TEMPERATURE AFTER MIXlNG tJ _ q, romperature, snoo nme.
'2 -
neerees minutes 11 -
32F(OC) 13 2 43 F (6 C) 67 10 _
72 F (23 C) 15 I 100 F (37 Cl 03 9 122 F (50 C) 0 25 !
Is _
5 l
- i. i \
G E, _
l i
2 5 _ l 5 i 4 -
3 i
2 _
e i _ _ _ _ _ _ - _ _ - - - - - ___--
i _
i i J.t_ - _.. - .L__ _ _
r, a en 60 80 tw 670 le mpe r stwee,
- F
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N _$ PAGE(S)
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1
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,\ h un.o.at . s..p.a y j l'el,r:lia s i het h...uil e . a o h a. I.n s .
l lu mint on.1 msnlatv.n pn rue 1 ani!
i ihint on pre i..I msulating bh.. L i
ripnpun nt. as e. manul.n imni tu t...
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a nniini m e nmp.isit ..n .mihirnut s f. . . . : .6. li;. ' ' !, .
e s hinnghnnt. le ss ontstanihng tharan tre. #I
. r . ! . . . .,. # 'Ji i. v ./ ' '4 l isin.s im Imle. , ),p, Y . fT., . ,),
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- Chemical Properties %',.f,l.y.q,t..glc...y..'
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'8 .{~ . 'i t i..t. .
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Fiberfaas Ilot finanirshiinin rurtlrnt (h't}y , ; ,'j.'
- glh,b,Y ; 's,*I- 8 ' }.',c.
s hemie.al ,.iabiht y s esisting atia. L g TO,L ' .('
Irmn nmst e nn usn r uernts I:u rp iinm. .n e h vih ollo..e n an.1 phnsph .i n m:nl and e nm enla atninikahrs lini 1) pic al thysical Propertien linaril al*n :rnist s usiilatinn an"! , , _ , _
reilui tinn.11 u rt by n ates or Stram. I '"I"' _,. 'I'" "
t her mal anil phpu al pnipra ins en r llasu t'a mposilmn A hnnma. Sihr a. Org.mn Hiniter resim nl upon th > ang Contmaous Usr 1.imit* Iny:l*C (200n*F)
Melt mg 1%nni 1795'C p:no61l Densit y 256 kg m'(16 th It.)
Spes ifu llcat 1093*C l2000'F) Irio j kn *C i 27 Blu lb *F)
Oigania. Ihnder Content in hiniinlus of Rupture As hu mril 4 I s In' N m lt nihon r}
Ahre 24 hr> (... tilh*C llMNFF) 2 i s Io' Nem:(:it Ih m'l
( :nmpi ram e Sir rngt h j
!. .. I h-h n m.it mn 0H6 10' Nim 8 (12 lhon l e I lanc.n Shrinkage- 24 hr (..-
'lrmperalute lsnakinghrat rntnhison) toe.7 : l l' ion *F) 0 :t" In't t t l l 2t HH1'Tl 2.;t".
1.s osnm Resistain e 4 !. 7 m ' t.n ( l'.O h sca l H711llll.on'F) No ablaison I l.c ( ..ne.no..u.1Iw 1.una ni t she s h.n proihn is is riaci nnneil hi streur W.1 i.. ..r i hange
. iii. i s., u.a ps ...h.. I n . li .ne g. .na e... . - . r ..a... .. . e .. . ... s . .. . . . . i. .a s .. . . . ..a. . .
..,i...... . ..e... . . . . . . . C A A B C A U N O urvi
,..o mi . . . . . . . .
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. .__ _ _ _ . . _ _ . . ~__.____.__.m.___. -
t sin se ns s ens nn..res p enoinn..n lint IWaist Availability Thermal Condurlis il3 ss Mcan'Icenpcrature (por AS1 M C177)*
- This kness 13. 25 anel 51 enm I ( %".1" .nn! 2'l
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1220 nun (4M~) r-7 2Hb [2.0) l wnlib 610 mm l24") E 6
l 'lioles .m. n :3.1n mm t v!.*I {
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! lypical Applications 5.
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-t..arlum l iLine int n.n e .u /
j rsp.msion film Ls j ;
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l -Furn.n r anil Liin lun L up insulation 3 #
l -Cm cr insulation for magnesium ulls 5. 144 [1.0) f ;
! -Glass furn'n.c im.Lsinne insulation 5- #
-Hrterhet alnry furnate ra p irisinri isissilm
'j j
- i i t2 j -
- Aluminum hukhng furnarr msulatinn j 072 (0.5) -
l -Cheanie nl er.n tus ensul. slum g 5
-Insulation los stationat y E
[ stram gesirrators j l g 0 t i 049 204 31ti 427 5:lH 700 871 982 ItN3 ;
(400) (600) (1600) (1000) (1200) [1400) (1600) (1800) (2000, Mean Temperature 'C (*F)
Hot Board" Hol Insulation Thickness - mm lin)
Face Cold Face Temperature 'C l'F)
- L C* (*F) 13 (%) 25 (1) 38 (1%) 51 12) 64 (2 %) 76 13) 102(4) j 1
538 (2000) 154(310) 1071226) 41 7 (188) 74 (166) 07 [152) 61 (141) 53 (128) 649 (1200) 185(305) 129(264) 103 (218) 88 (191) 70 [173) 71 [160l bl l142) 760 (1400) 217(422) 1511:104) 121 (249) 102 [217) 91 (196) #12 (IMO) 71 (159).
871 (1600) 249 (481l 173(346) 140 1284) 189 [246) 104 (220) 95 (202) 80 (177) 982 (1800) 2H2l540) 199(391) 160 1320) 135 (276) 119 l247) 10M [22G) 92 (197) 1093 (2000) 316(601) 225(437) 1H() (357) 154 l309) 1:15 l27b) 122 l2*all 103 l21til f 1204 (2200) 3501662) 2'. I [4 H4 ) 202 l397) 17.t (343) 152 [306) 137 l279) '110 (241) i 1260 l2300) *HW(692) 20:1(507) 283(417) IH2[360) 161 1322) 145 (293) 123 (253) j
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" All bras lh.u a alrulatn.ns m r b.nril .n a surfa. r runusvil y I.u tur of .pn. un amluent temperalmr af 27'C liio't 1. omt rrru a unl s clos eb ~'
unirsi nt hern tse ssaini All thes mai s unilue lu d.s s alues fur hierfrus mairs ials havr iern mr.nur rit m mtmil..ncr u ph AN i ht Test )
Prntrihu r (:.177 w hen comparing smal.u ilaia. 0 n a.lvisable to thrck the vahchty nf ull .hermal rumiuctivity valurs aml ensun r ihe rraullmx )
heat flow e ah ulainens mr baseil un ilm same eviuhtsun farturo Variations in any of these facturn will result in sigmfu ant sh!frirm es m the I ralc ulatnl itata. !
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APPENDIX B
- 1. Test Comments
- 2. Furnace Atmosphere Temperature
- 3. Thermocouple Reference Chart
- 4. Unexposed surface Temperature i
F.XHIPIT M
- r ; 3D_ OF 35 PAGE6.1 COnStruClion itChnology Inb0tato*ws r- -p y - - - -- er Ee '= -e'-a
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. . DON CORHING (CR4'978) - 05/11/82 IEST COMMEllT5 1:00:00 BOARD OH EXPOSED SIDE OF PEli #2 IN THE SOUTHWEST CORilER DEFLECTED
~
APPROX. 1 IH.
1:20:00 E0ARD ON EXPOSED SIDE OF PEH #2 IN THE SOUTHWEST CORHER DEFLECTED APPROM. 2 IH.
1:20:00 BOARD OH EXPOSED SIDE OF PEH #1 IN THE SOUTHEAST COPilEP DEFLECTED ,
APPROX. 1 IH.
2: 40:00 POARD OH EXPOSED SIDE OF PEN #1 FELL HAY ELOCKING DRAFT PORT AND TEMP. INCREASE IN FURHACE.
DRAFT PORT CLEARED BY REMOVIllG OBSERVATION WINDOW AND RUHHING A EAR DOWN TO BREAK UP THE BOARD. DRAFT RETURilED TO .08 NEG.
3:00:00 NO SMOKE NOTED DURING TEST FROM THE UNEXPOSED SURFACE HOSE STREAM TESTS:
110 HATER PROJECTED EEYOllD THE UNEXPOSED SUFFACE DURING IEEE-634 HOSE STREAM TEST FOR 14 SEC.
NO WATER PROJECTED EEY0llD THE UNEXPOSED SURFACE DURING All! HOSE STREAN TEST FOR 14 SEC.
NO WATER PROJECTED EEYOHD THE UNEXPOSED SURFACE DURING ASTN E-119 HOSE STREAM TEST FOR 14 SEC.
HOTE:
DRAFT RUH AT .08 HEC AVG DEPTH OF LOSS Oil PEH #1 APPROX 6 1/2 Ill.
AVG DEPTH OF LOSS OH PEli #2 APPROX 4 1/4 Ill.
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F.XHIPIT M "E il OF d6 PAGE(S) l
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i DOW CORil!HC 6CR49?C) - 05/11<S2 !
FURilACE ATTIOSPHEF E TEMPEP ATUF.E - (DEC. F) ,
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VARIATIOtt FF.OM f TEST TIME, FUF:llACE ASTM E119 f TEMP. - ASTM TEMP. ,
TEMP.
Hr: Min F F F l l
68 36 ,
l 0:00 104 !
1000 123 0:05 1123 1 1
1301 1300 0110. 20 1419 1399 0:15 -23 l 1439 1462 0:20 10 1520 1510 0:25 -4 1546 1550 0:30 -10 1574 1584 0:35 ~7 1606 1613 0: 40 -4 1634 1638 0:45 -5 l 1656 1661 0:50 3 l
1684 1681 J 0:55 -3 1692 1700 1:00 -5 1713 1718 1:05 2 1737 1735 1:10 -7 1743 1750 1:15 -0 1757 1765 1:20 2 1781 1779 l
1:25 -2 1790 1792 1:30 -0 1804 1804 f
1:35 -0 1815 1815 t
1*40 -6 1820 1826 1:45 -0 1835 1835 1:50 9 1852 1843 1:55 7 1857 1850 2:00 15 f 1877 1862 2:10 4 l 1879 1875 2:20 -6
[ 2:30 1882 1888 l
1900 -42 2:40 1858 l 1912 30 2:50 1942 I
1925 17 3:00 1942 i
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l DON CORilIllG (CR4978) - 05/11/82 !
THERN0 COUPLE REFEREllCE CHART FRAME j PRIllT HO. THERNOCOUPLE !
. 11 0 .
HO. THEFNOCOUPLE L OCA TIOil 11 1 -
1 _
11 2 2 PEtt 1 0 IH. DEPTH (E.S.>
11 3 3 PEN 1 3 Ill. DEPTH (E.S.)
11 4 4 PEtt 1 6 Ill. DEPTH (E.S.)
11 5 5 PEN 1 9 IH. DEPTH (E.S.)
11 f.
PEH 1 11 7 6
PEtt 1 UNEXPOSED SURFACE il0RTH ,
11 7 UllEXPOSED SURFACE SOUTH I 8 PEli 2 0 IH. DEPTH (E.S.)
8 11 9 9 PEN 2 3 IH. DEPTH (E.S.)
!! 10 PEtl 2 *6 Ill. DEPTH (E.S.)
il !!
10 11 PEli ?
Ill. DEPTH (E.S.)
11 12 12 PEtt .'. UllEXPOSED SURFACE 110RTH FEH 2 Ut1 EXPOSED SURFACE SOUT i
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' D OW C ORilitiG (CR4978) - 05/11<82 T/C TREE . Ut4 EXPOSED sui; FACE TEMP (DEG. F.).
TEST TINE, T/C t10.
2- 3 4 5 6 Hr: Min 1 85 79 78 78 78 78 0:00 146 78 77 '77 77 77 I 0:05 20 81 78 77 77 77 0:10 288 84 78 78 77 77 0:15 354 88 78 78 77 77 0:20 410 93 79 79 78 78 0:25 i
460 99 80 79 78 78 l 0:30 502 104 80 78 77 77 ,
0:35 i 542 110 81 77 77 77 l 0:40 573 119 83 79 78 78 0: 45 600 127 84 79 78 78 0:50 636 136 86 80 78 78
! 0:55 683 145 87 80 78 78 1:00 716 153 88 80 78 78 1:05 775 162 90 80 78 78 1:le 865 173 91 81 78 78
! 1:15 186 93 81 78 78 1:20 919 957 199 95 82 78 79 l 1:25 212 97 82 78 78 1:30 992 f 82 79 79 1:35 1031 226 100 i 239 102 SS 79 79 1: 40 1064 255 105 83 79 79 j
1: 45 1100 272 107 84 79 79 1:50 1137 291 111 84 79 79 1:55 1179 311 114 85 79 79 2:00 1199 350 121 86 79 79 2:10 1223 l 88 79 79 2:20 1031 394 129 L 80 80 1264 448 138 89 2:30 148 91 e0 e0 2:40 1653 512 185 94 81 81 2:50 1819 1755 321 104 81 81 3:00 1759 1764' l
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l DOW CORN!HC (CR4978) - 05/11/82 T/C TREE t. WHEXPOSED SURFACE TEMP (DEG. F.) 'lt TEST TIME, T/C HO.
He:Hin 7 8 9 to . 11 12 l ?
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- 0:00 86 79 78 78 78 78 f l
0:05 160 79 77 .. <, 77 .
0:10 22w 84 77 77 77 77 ;
i 0:15 323 88 78 77 77 77 '
0:20 391 95 79 78 77 77 f 0:25 448 102 80 79 78 78 t
0:30 500 109 81 79 78 78 >
l 0:35 543 116 81 78 77 77 ,
r :
0:40 588 123 82 78 77 77 0:45 631 134 84 79 78 78 !
0:50 668 144 86 79 78 78 0:55 698 153 87 80 78 78 !
1:00 718 162 89 80 78 78 f 1:05 767 173 91 81 78 78 i l
1:10 838 184 92 81 78 78 !
! 1:15 907 197 94 81 78 78 1:20 953 212 96 82 78 78 1:25 993 227 99 82 78 79 1:30 1018 243 , 101 83 78 78
! 1:35 1053 259 105 83 79 '79 l 1: 40 1110 275 107 84 79. 79 !
1:45 1152 294 111 84 79 79 j 1:50 1185 313 114 85 79 79 l 1:55 1213 332 118 86 79 79 l
2:00 1238 351 122 86 79 79 I
.2:10 1245 386 130 88 79 79 2:20 1250 423 138 09 79 79 2:30 1261 458 14e 91 80 80 2: 40 1271 499 158 93 80 80 2:50 1311 550 170 96 81 81 3:00 1346 615 183 93 81 81 i
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. i 4 PACE NO OF 45 PAascs3
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! .I DOW CORNING
- i fgj;3p WMS %.. . DOW CORNING U.S.A.
May 8, 1985 hMDLAND, hMCHIGAN 48640-0994 Telephone: (517) 496-4000 I N' Transco Products, Inc. yJW 10 hb3 55 East Jacksun Blvd.
Chicago, IL 60604 g,g Attention: Mr. Greg Jarotz Technical Manager
Subject:
DOW CORNING @ 3-6548 SILICONE RTV F0AM This letter is to confirm what was expressed as the technical opinions of DOW CORNING during the meeting at Millstone Unit 3 on April 16, 1985.
- 1. Foam Shrinkage It is normal to observe nominal shrinkage of the silicone foam 24 to 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> after its installation, which is attributed to gradual pressure relief upon completion of the foaming reaction and thermally induced contraction when the material is cooling down from the mildly exothermic reaction. The nominal shrinkage of the silicone foam may be observed as either concave surface or gap formation at perimeters of penetration openings, depending on sizes of openings, adhesion of the foam to the side of an opening, etc.
If such gaps are no more than one third of the total depth of the silicone foam and are no larger than 3/8 inch in width, there should be no adverse effects on the fire resistant performance of the silicone foam firestop assembly. If, however, gaps are deeper and/or wider than the above limits, repair work is recommended.
Applying beads of DOW CORNING @ 96-081 RTV Adhesive / Sealant to fill gaps in approximately one inch depth is the recommended repair procedure.
- 2. Foam Delamination (Layering)
There are external and installation conditions which are identified to cause foam delamination. Included are high moisture content in air (absolute humidity) when the foam is installed, air-borne contaminants, and poor installation techniques. Adhering to a proper installation procedure ensures to minimize foam delamination j as long as there is no gross air-borne contamination in existence.
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' A three-hour rated ASTM E-119 fire exposure and hose stream test run by Portland Cement Association,~Skokie, IL compared fire resistive properties of the silicone foam with and without de-lamination. The results of the comparison test established that the presence of air voids in the range of 10 to 15% of the total-l thickness of the silicone foam does not adversely affect the g
intended performance of the product. (
Reference:
Const ruction '
Technology Laboratories, Portland Cement Association Test Report i No. CR5142 dated July 1983). -
The installation procedure of Transco Products, Inc., was reviewed, and it is considered that it adequately addresses the prerequisite for minimizing foam delamination. I
- 3. Waiting Period Between Foam Pours i
A penetration sealing design which incorporates alumina-silicate boards as permanent damming along with minimum 9 inches of the l
silicone foam, is considered to have additional safety factors l
' built in to pass the 3 hour3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> rated ASTM E-119 test criteria. While I
more critical sealing designs constructed with a 12 inches thick foam without permanent damming boards require special precautions to optjmize installation of the foam in a larger free area (over 400 in without any penetrating items in a floor opening), foam installation in designs with the permanent damming boards can be ,
i handled in an expedient manner. For example, instead of waiting i
for 15 minutes between the foam pours, a 5 minute waiting period should be sufficient for installation of the foam in a foam / perma-nent damming design.
- 4. Mixing Ratio Check '
It is recommended to conduct mixing ratio check of foam dispensing equipment at least once every shift at the beginning of each shift.
During the field observation which followed the meeting, I had oppor-tunity to inspect two silicone foam penetration seals which had been suspected of posing foam shrinkage problems. Neither one of the l
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' seals exhibited gaps greater than the maximum allowable limits described 1
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earlier in this letter. The appearance of those two foam, seals was a ;
l typical one I have seen at many other nuclear power plants, and I could j not find any defects in them. i j.
If you have any questions on the subjects covered in this letter, please let me know. i 1
l Yours truly, H. Takahashi i Sr. Technical Service Specialist l
l Technical Service and Development l cc: W. G. Carter - Stone & Webster Engineering, Corp., CT.
! J. P. Carter - Stone & Webster Engineering, Corp., CT.
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M DOW CORNING U.S.A. '
September 2, 1983 MRAN , WCHIGAN 4840 Telephone: ($17) 496-4000 Mr. Tom Hoff, Product Manager TRANSCO INC.
tycuvrk 55 East Jackson Avenue SEP12 E l Chicago, Illinois 60604 Phone: (312) 427-2818 fRANSCO, INC. 4
Subject:
DOW CORNING' 3-6548 SILICONE RTV FOAM
Dear Mr. Hoff:
1 Earlier this year I sent you a copy of our technical recom-mendations in order to assist you to improve physical integ-l rity of the silicone foam installed in large penetration openings.
As a follow-up to the technical recommendation, Dow Corning recently completed an experiment on effects of air pockets in the silicone foam on its fire endurance characteristics.
The results of the experiment, which is reported in the at- l tached Portland Cement Association's fire and hose stream test report (July, 1983), evidenced the presence of two hor- {
l izontal layers of air pockets in 12 inches of the silicone l foam does not adversely affect fire endurance properties of the silicone foam when installed in a floor assembly.
I am also aware of two other ASTM E-119 fire tests (floor burn) in which the silicone foam with unintentionally in-duced air pockets successfully passed the all test criter- .
ia. Those two tests were not sponsored by Dow Corning, and therefore, I cannot provide you with test report copies. If you would be interested in details of those two fire tests, 1
I will let you contact the test sponsors directly.
l Although all items covered in our technical recommendations are still valid, actual field conditions may sometimes make it extremely difficult for your technicians to adhere to the ideal installation conditions. Pouring the silicone foam under adverse conditions including high absolute humidity 1
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H33 - Our Oh )* ear: A Hator) of Achievenent, A Future of Success i
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1 3-6548' Silicone RTV Foam '
September 2, 1983-
^Page 2 t'
and high concentration of air-borne contaminants (hydro-car-bon, sulphur, concrete dust, etc.) may be dictated depending on a job schedule, although such installation is highly un-desirable. Hopefully the recent findings on the. neutral effects of air pockets will alleviate restrictions your field technicians have been forced to live with.
Please let me know if you have any questions on the attached test report.
Yours truly, e j
. cd H. "Tak" Takahashi
, Sr. Technical Service Specialist Technical Service & Development l
Attachments cc: 8. Clark - Dow Corning Corporation, 069 W. Frank -'Dow Corning Corporation, 069 E. Rusk - Dow Corning Corporation, C02310
'D. Vogt - Dow Corning Corporation. CO2424 j
C..W'olf - Dow Corning' Corporation, C02310 .
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