ML20215H991
| ML20215H991 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon, 05000000 |
| Issue date: | 11/22/1982 |
| From: | PACIFIC GAS & ELECTRIC CO. |
| To: | |
| Shared Package | |
| ML20213D283 | List: |
| References | |
| FOIA-84-21 RCP-G-9, NUDOCS 8705070178 | |
| Download: ML20215H991 (19) | |
Text
-
1 N wsER RCP G-9 UDGrEdB Pacific Gas and Electric Company
, REVISION 1 DEPARTMENT OF NUCLEAR Pt. ANT OPERATIONS DATE 11/2/82 1(
DIABLO CANYON POWER PLANT UNIT NO(S) 1 AND 2 PAGE I OF 8 RADIATION C0flTROL PROCEDURE Tm.E:
USE OF RESPIRATORY EQUIPitEllT FOR PROTECTION AGAINST huf AIRBORNE RADI0 ACTIVE MATERIALS h
APPROVED:
PLANT MANAGER [
DATE SCOPE This procedure outlines the requirements for the use of respiratory equip-ment for protection against airborne radioactive materials. The requirements e
for the use of respiratory equipment for other purposes (e.g., welding fumes, dust) are contained in the Company's Respirator Manual issued by the Safety, Health and Claims Department.
DISCUSSION The overriding concern in establishing a respiratory protection program is to minimize personnel exposure due to the inhalation of airborne radioactive material s. To the extent practical, the concentrations of airborne radio-activity should be reduced or minimized using engineering controls or pro-cedures which minimize the release of airborne radioactivity into a workspace atmosphere rather than depend upon the use of respiratory equipment. However,
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when entry into areas with elevated levels of airborne radioactivity is re-quired, respiratory equipment may be used to reduce the amount of radioactivity
'l inhaled. The specification of the type of respirator to be worn and the other controls on intake of radioactivity are specified in Radiation Control Procedure G-3, " Control of Internal Exposure".
PROCEDURE 1.
Prerequisites to the Use of Respiratory Equipment a.
Prior to the assignment of any individual to a task requiring the use of respirators, a determination shall be made that the individual is physically able to perfonn the work and use respiratory equipment.
The details of this examination are discussed in Radiation Control Standard 5.
b.
Prior to the assignment of any individual to a task requiring the use of respirators, the individual shall be trained in the proper care and use of respirators. The respirators training program is described in Administrative Procedure B-251, " Respirator Training Program".
c.
Prior to permitting any'fiidTvidual to wear a respirator which operates under negative pressure (that is, air purifying respirators or air supplying respirators operating in the demand mode), he shall be indi-vidually fitted for the type of respirator to be used. The fitting shall be conducted in accordance with plant procedure RCP D-6.or I
precedures in the Respirator Manual. The individual shall be issued a-card showing which negative pressure respirators he is pennitted to wear, and records of fitting data shall be maintained.
e -
DIA84.0 CANYON POWER PLANT UNIT NO(S) 1 AND 2 NUMBE RCP G-9 DATE 11/2/82 s
PAos 2 oF. 8 Tm.E: USE OF RESPIRATORY EQUIPMENT FOR PROTECTION AGAINST AIRBORNE RADI0 ACTIVE MATERIALS d.
Only that equipment which has been approved by the National Institute for Occupational Safety and Health (NIOSH) shall be used for respira-tory protection. Table I lists those mspirators which are currently approved for use at Diablo Canyon Power Plant. Only those parts of a respirator which were used in the NIOSH approval may be used with that respirator. Substitution of parts from other manufacturers or parts intended for use only in other respirators is prohibited.
2.
Issue of Respirators i
a.
The selection of the appropriate type of respirator to be used by an individual for a given task is the responsibility of R'adiation Protec-tion. personnel. Airborne radioactivity surveys are made in order to detennine' the ambient airborne radioactivity concentrations in the work area. Routine airborne radioactivity surveys are performed according j
to the schedule in Radiation Control Procedure S-1.
Non-routine sur-veys will be made on an as needed basis. In either case, the measure-ment of airborne radioactivity will be conducted according to RCP G-8 j
The type of respirator will be selected following the guidelines in RCP G-3 and will be specified on the applicable Routine Work Permit or Special Work Pennit.
l i
b.
Respirators will be available for issue at access control or other designated locations within the Controlled Area. Respirators stored for issue at locations in the Controlled Area where they could become contaminated should be sealed in plastic bags. Respirators which are i
defective or not ready for issue should not be stored at the same location as those ready for issue. If defective respirators must be stored in the same room, they shall be clearly identified with infor-mation tags.
c.
Respirators will be issued only to those individuals who meet the pre-requisites in 1.a, b and c above.
It will be the responsibility of the individual's supervisor or foreman to ascertain that the individual meets the prerequisites before assigning him to a task requiring the use of respirators.
d.
Respirators which operate under negative pressure will be issued only to those individuals who are clean shaven in the area of the mask to face seal.
l 3.
Use of Respirators a.
When issued a respirator, each individual shall make a visual inspection of the respirator for defects. Items to be looked for areL _.
- 1) Torn or worn out straps
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otA8LO CANYON POWER PLANT UNIT %S) 1 AND 2 NUMBE RCP G-9 DATE 11/2/82 PAGE 3 OF 8
i TITLE: USE OF RESPIRATORY EQUIPMENT FOR PROTECTION AGAINST AIRBORNE RADI0 ACTIVE MATERIALS
- 2) Missing buckles.
- 3) Deterioration or cracking of the window and rubber portions of the mask.
- 4) Missing or deteriorating exhalation valve.
- 5) Deterioration or cracking of air hoses.
b.
Before entering the area requiring the respirator, each individual shall
)
put the respirator on and functionally check it to insure that it is operating properly.1 Respirators should be properly fitted and checked according to the procedures contained in the Respirator Manual for that particular respirator. Other protective clothing such as hoods and coveralls must be worn in a manner to not interfere with the respirator.
c.
An individual should leave the Airborne Radioactivity Area for relief from respirator use in case of equipment failure, physical or psycho-logical discomfort, or any other condition that might cause reduction in the protection afforded,the wearer.
k d.
While in an Airborne Radioactivity Area, personnel shall not remove the mask from the face for purposes of conversation, visibility, eyeglass adjustment, or other discomfont.
e.
When removing the respirator after leaving the Airborne Radioactivity Area, precautions should be taken to avoid contaminating the inner surfaces of the mask. This is especially important if reentry to the area is to be made within a short time.
4.
Reuse of Respirators a.
Respirators may be reused by the same individual on the same day under certain conditions. As a minimum, respirator facepieces and breathing tubes must be cleaned and sanitized between use by two different indi-viduals or by the same individual on different working days.
b.
When making multiple entries and exits to an area requiring a respirator within a single work period, contamination surveys are usually impractical.
Surveys in these cases are not required unless specified on the SWP or the individual is crossing a contamination control point requiring surveys.
Care should always be taken when removing and donning the mask to avoid contaminating the inner surfRes.
1 When half facepieces which operate with negative pressure are used, this func-tional check shall include a test of the mask to face seal using a challenge g
atmosphere of irritant smoke. This test is to be repeated each time the mask is put on. Masks of this type are currently not approved for use at Diablo Canyon for protection against radioactive materials.
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NUMBER RCP G-9 DIABLO CANYON POWER Pt. ANT UNIT NO(S) 1 AND 2 OATE 11/2/82 PAGE 4 OF 8
TITLE: USE OF RESPIRATORY EQUIPMENT FOR PROTECTION AGAINST AIRBORNE RADI0 ACTIVE MATERIALS When an individual leaves the controlled area and plans to return later c.
and reuse the same respirator, the respirator should be surveyed for contamination. (Air hoses may be left at the work location if their protective plugs are inserted in the disconnects.) The contamination limits for reuse are listed in Table II at the end of this procedure.
If the survey shows that the equipment is below the limits, the res-pirator should be tagged and identified with the individuals name.
5.
Return of Respirators a.
Unless respiratory equipment is going to be reused on the same day by the same individual, it should be taken to access control or other designated area for surveying, decontamination, inspection, servicing I
and cleaning prior to reuse. The only exception to this is that pressure boxes and the air hoses between the air supply and pressure regulator box may be returned to storage locations within the Controlled Area after being found acceptably free of contamination (see Table II).
b.
When a respirator is returned to access control or other designated area because of a defect or failure of the respirator, the user shall either notify radiation protection personnel of the problem or tag the respirator giving a clear explanation of the defect. During periods when radiation protection personnel are not available, the Shift Foreman shall be notified of any respiratory equipment failure, c.
At access control or other designated location, returned respirators shall be surveyed and decont'aminated if necessary. Then they shall be inspected, serviced, cleaned, and sterilized in preparation for reuse.
Filter cartridges on air purifying respirators shall be removed during l
cleaning and sanitizing and discarded. The filters shall not be reused.
Procedures for maintenance and inspection of respirators are contained in the Ccmpany Respirator Manual. Maintenance and inspection of special items such as comunication devices, pressure regulator boxes, etc.,
should follow manufacturer recomendations.
l 6.
Storage of Respiratory Equipment The main storage location for respiratory equipment, replacement parts a.
and tools is in the fan room in Access Control. Other storage loca-tions may be established as necessary throughout the Controlled Area.
These auxiliary storage locations should be metal cabinets to protect the respiratory equipment. Self contained breathing apparatus for emergency use may be hung on7 tall racks as necessary. These racks should have cloth or vinyl covers for protection.
b.
Equipment that is defective or not ready for use should be either stored at separate locations or clearly marked and labeled as not l
available for use.
Facemasks which are ready for use should be stored in plastic bags c.
with the date of inspection and cleaning placed on the bag.
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RCP G-9 DIA8LO CANYON POWER PLANT UNIT NO(S) l AND 2 DATE 11/2/82 PAGE 5 OF 8
Tm.E: USE OF RESPIRATORY EQUIPMENT FOR PROTECTION AGAINST AIRBORNE RADIOACTIVE MATERIALS d.
Each auxiliary storage location shall have an inventory list assigned to it. An inventory shall be made on a weekly basis and missing or defective equipment replaced. Equipment which is in use at the time of inventory shall be replaced as soon as practical. The main stor-age location need not be inventoried weekly.
7.
Additional Limitations on Use of Respirators a.
When air supplied suits are used a rescue person equipped with self-contained breathing apparatus and comunications equipment shall be standing by.
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b.
No credit is to be taken for'use of sorbents against radioactive mate-rials when selecting appropriate respirators.
c.
Consideration must be given to adequate skin protection when radio-active materials which can be absorbed through the skin are encountered.
d.
Breathing air and oxygen shall not be used in the same apparatus, l
(
REFERENCES 1.
Title 10. Code of Federal Regulations, Part 20 2.
NRC Regulatory Guide 8.15 " Acceptable Programs for Respiratory Protection",
l October 1976 l
3.
Radiation Control Standard 2 " Internal Exposure Controls" 4.
Radiation Control Standard 5 " Medical" 5.
Radiation Control Procedure G-3 " Personnel Internal Exposure Control" 6.
Radiation Control Procedure G-8 " Measurement of Airborne Radioactivity" l
7.
Radiation Control Procedure 5-1 " Plant Airborne Radioactivity Surveillance" l
l 8.
Administrative Procedure B-251 " Respirator Training Program" 9.
Respirator Manual, Safety Health and Claims Department, June 1,1976 4
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N RCP G-9 DIA8LO CANYON POWER PLANT UNIT NO(S) 1 AND 2 DATE 11/2/82 PAGE 6 OF 8
)
in1E: USE OF RESPIRATORY EQUIPMENT FOR PROTECTION AGAINST AIRBORNE RADI0 ACTIVE MATERIALS TABLE I RESPIRATORS APPROVED FOR USE AT DIABLO CANYON POWER PLANT FOR PROTECTION AGAINST RADI0 ACTIVE MATERIALS NIOSH PARTS PARTS TYPE OF RESPIRATOR APPROVAL #
MFG.
NO.
DESCRIPTION 1.
Filter Respirator, TC-21C-150 MSA 95940 Clearview Facepiece full facepiece 88480 Filter 2.
Filter Respirator, TC-21 C-155 MSA 460460 Ultra Twin Facepiece full facepiece (7-204)
TC-21C-135 MSA 464035 Filter TC-23C-153 MSA 464027 Filter 3.
Powdered Air TC-21 C-186 MSA 463356 Ultravue Facepiecq Purifying Respir.
463380 Motor-blower and Hose Assembly 463284 Filter 463239 Battery 463469 Belt 4.
Airline Respirator, TC-19C-78 MSA 95940 Clearview Facepiece constant flow 9961 Web Belt 457158 Breathing Tube Assembly 461706 Control Valve with Schrader coupling 445021 25 ft. Airline Hose 455022 50 ft. Airline Hose 5.
Duo-Flo Combination
-TC-21C-200 MSA 7-203 Ultraview Facepiece Filter or Airline, full facepiece 456651 Breathing Tube 5-260 Airline Adapter 455021 25 ft. Airline Hose 455022 50 ft. Airline Hose 9961 Belt TC-21C-150 464807 Filter 88480 Filter
f.
N RCP G-9 DIABLO CANYON POWER Pt. ANT UNIT NO(S) 1 AND 2 OATE 11/2/82 4
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Tn1E: USE OF RESPIRATORY EQUIPMENT FOR PROTECTION AGAINST AIRBORNE RADIOACTIVE MATERIALS TABLE I (CON'T)
NIOSH PARTS PARTS TYPE OF RESPIRATOR APPROVAL #
MFG NO.
DCSCRIPTION 6.
Air Fed Hood, Rad TC-19C-124 SAFETY RC2095SC Air Feed Hood Safe
& SUP 7.
Self Contained TC-13F-30 MSA 96057 Clearview Face-Breathing Appara-piece tus, pressure demand 449267 Breathing Tube Assembly 449910 Regulator Assembly 93184 Carrier & Harness 95007 Air Cylinder and Valve i
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G-9 otAsLO CANYON POWER PLANT UNIT NO(S) 1 AND 2 DATE 11/2/82 PAGE 8 OF 8 TITLE: USE OF RESPIRATORY EQUIPMENT FOR PROTECTION AGAINST AIRBORNE RADIOACTIVE MATERIALS TABLE II CONTAMINATION LIMITS FOR REUSE OF RESPIRATORY PROTECTION EQUIPMENT LIMITS EQUIPMENT LOCATION DETECTOR CPM ABOVE BKG Facepieces, breathing External surfaces HP-240 1.100 tubes, and regulators HP-210 4000 HP-260 4000 Facepieces Internal surface HP-240 11 smears (4 in.sq.)
HP-210 40 HP-260 40 Contact Rad Owl 1 mR/hr Belts, harnesses, cylinders, and R0-2 other gear
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Filter cartridges Contact Rad Owl 2 mR/hr R0-2 l
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Appendix A 9
Effective Throat x,
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Jj Piete: The effectree throat of a need is me minemum distence from me root of me joent to its face. wim or wimout a onduction of 1/8 irt.
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Appendix B i
Effective Throats of Fillet Welds in Skewed T-Joints f.
Table B is a tabulation showing equivalent leg size.
directly to the leg size. The required leg size for fillet g
factors for the range of dihedral angles between 60 deg welds in skewed joints is calculated usmg the equiva-and 135 deg, assuming no gap. Gaps 1/16 in. (1.6 mm) or lent leg size factor for correct dihedral angle, as shown in L
greater, but not exceeding 3/16 m. (5 mm), shall be added the example.
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EXAMPLE (U.S. customary units)
Given:Sk
. joint, angle deg: gap: 1/16 ggg (S! units)
- Required: Strength equivalent to 90 deg fillet weld of size: 5/16 (0.313)in.
Given: Skewed T. joint, angle: 75 deg; gap: 1.6 mm Required: Strength equivalent to 90 deg Procedure:(1) Factor foh des from Table B: 0.86 fillet weld of size: 8.0 mm Procedure:(1) Factor fot 75 deg from Table B: 0.86 (2) Equivalent leg size, w, of (2) Equivalent leg size, w, of skewedjoint, without gap:
skewed joint, without gap:
w = 0.86 x 0.313= 0.269 in.
w = 0.86 x 8.0 = 6.9 mm (g
0.063 in.
(3) With gap of:
1.6 m m (4) Required leg size, w, w = 0.332 in.
(4) Required leg size, w, of 8.5 mm of skewed fillet skewed fillet weld; weld:[(2) + (3)]
((2) + (3)]
(5) Roundir.g up to a practical (5) Rounding up to a practical dimension: w = 3/8 in.
dimension: w = 9.0 mm 1
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i 194 / AneDEXB Equivalent fillet wold leg size factors for elsewed T-joints 60) 65 70 75 80 85 90 95 Dihedralangle.4
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Comparable fillet weld fg
.A see for same strengs 0 *l 0.76 Qa4) 0.W 0.91 0.%
l.00 1.03 Dihedral angle. 4 100 105 110
!!S 120 125 130 135 ;
s Comparable fillet weld sue for same strengt 1.08 1.12 1.16 1.19 1.23 1.25 1.28 1.31 1
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For fillet welds having equal measured legs (w.), the For gaps < !/16 in., use I.'
distance from the root of the joint to the face of the dia-
- g. = 0 and t'. = t.
l grammatic weld (t.) may be calculated as follows:
For gaps > l/16 in. and
- 3/16 in., use where the measured leg of such fillet weld (w.) is the g, w, - g, perpendicular distance from the surface of the joint to the I
opposite toe, and (g) is the gap, if any, between parts.
2 sin See Fig. 2.7.1. Acceptable gaps art defined in 3.3.1.
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' 'I NOTE: THIS SFPSM is NUMBERED TO CORRELATE WITH THE ASSOCIATED PSM.
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Ej ALLOWABLE STRESS FOR VELDING
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PSM-3.10.2, Rev.0 shall be replaced by this SFPSM for projects in g!
I San Francisco.
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GENERAL DESCRIPTION
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ji This SFPSM provides guidelines for determining veld allowable stresses for
=
linear type pipe supports. These allowables do not apply to pressure boundary ig welds and place and shall type pipe supports welds.
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. Allowable veld stresses (or forces) are for base metal of SA-36 or A-36 to} be velded with E70XX electrodes at environmental temperature of 3000F. For other material following code sections should be followed: 1i gj Table NT-3292.1-1, (NT) a. E} Article 121.1.2, (B31.1)
- 1
] Article 1.5.3 (A1SC) .J I O 3. FILLET WELD 51 1 i U$ 3.1 The allowable stress limits for fillet welds in linear type pipe li~- supports shall be as given in Table 3.1-1. kf Table 3.1-1 t* ALLOWABLE STRF.SS LIMIT FOR FILLET VELD ,, 7 I I E -l Applic'able Allowable Stress Code Limits D ASME Section III 18 kai I Subsection NF 'l B31.1 9.45 kai 1J .u. ]j AISC 18 ksi y :,5.h1 .2' ~ 7ig n g 5: i I . } a;g avse ..rne.esa.c ase-m om
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DaTE-REvtssoevs gy CHK APP R SFPD PLANT DESIGN ALLOWABLE STRESS FOR WELDING SFPSM-3.10. 2 ^ SHEET 1 oP P.1724A T70 es4sto - - - - ? -.z. ..:_.__.--..-,a-.--.
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~ ' ' ' ' $ Y l l 2i 1I jj 3.3 Allowable Loads For Skewed Fillet Wald h Allowable loads for fillet weld with skewed angle G greater f' than 950 but not more than 1350 shall be reduced to the values given in Table 3.3-1. Ij 5y Table 3.3-1 -i [g Allowable Loads For Skewed Filled Welds ," ~ e = Applicable to 950 < 0 < 135 I3lj dg WELD SIZE ALLOWABLE LOADS (KIP /IN) i W } (inch) g [, CODES / FORMULA 1j j'ggy B31.1 AISC L a g(1.0) (W) (4 73)(W) (9.0)(W) w ,I ag 1/8 1.12 0.59 1.12 11 3/16 1.69 0.89 1.69 }[ 1/4 2.25 1.18 2.25
- 1 li 5/16 2.81 1.48 2.81 w.I f{
3/8 3.38 1.77 3.38 .5 i g 1/2 4.50 2.37 4.50 5 s51 1 9.00 4 73 9.00 !i 11 as E IT l ug 4 55 srh - PLANT DESIGN p g;--},1d. 2~~ "~ f .t.... e
J,L[ uced V $ n;E s@M,iw 4g4 % s dih$pdy d. @.q 4 4. cacove wet.o l a 4.1 Complete Penetration Groove Weld gs 4.1.1 For ASME Section III, Subsection NF and AISC.. g II If all around complete penetration weld is used and all types of stresses in the base setal at the g1 connection are within the applicable allow'able limits, g[ then there is no need for checking the adequacy of {a the weld. .j I Generally, the tensile, compression and shear stress allowable for the effective area is the same as for the j base metal.a I[i 4.1.2 For 831.1 I>]{ Allowable stress limit 9.45 ksi = 11 31 4.2 Partial Penetration Groove Weld: I! j 3, The weld adequacy can be checked by using the sectional properties of the effective throat of the partial I.:L penetrat' ion weld outline in the same fashion as for the j1 base metal. For Asus section III, subsection NF the allowable s d{ stress limits for compression and shear shall be the sa:se as for the base metal and the tensile stress allowable shall be 18 ksi. m j For AISC, the allowable stress limits for the compression, tension and shear shall be same as for the base metal. g 5 For 831.1, allowable stress limit 9.45 ksi = II I.1 a g5 Sa lfl I y: :* 4-l5
- i..h PLANT DESIGN
.n S FPSM ~'T 20 r - ~ '- RM SHEET 5 og 5 ~ o-SFPD.__ R EV. NO.- 0 a pw+ -w .,,---g-yy_y ,,,-----,,_g.-
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l~ ~ .\\j. tU r*lb W'~.l:> & 4-A.% Q 5lk ['E2:Nk*[hv7Hk$li25.' e'.: QY? ~' 5i-SO:RG UV ' Y h & Y .. c';. ;f -g
- 6. f.,
>ruwaur s I li jj DESIGN OF FIII.ET WELDS
- U '*'
FOR SKZWED T-JOIh7S 6 2 76x 'd.: I. SCOPE I.5p This design guide provides the procedure for designing .g fillet welds used in skewed T-joints as shown in Figure 1. g c-
- r. 5 I
II. y ;* DEFINITIONS AND BASIC RELATIONS .a-3 t E5 + 3 ii .s 57 e-
- lli 11 91 2j w
e2 W E: .g L 3
- 2. s A
Is / a= 4e . F. i, g,
- =2
.g s ' ey Is E$ Te = K W (II-1) Pia
- f For e ) 90,
K = ces e/2 (II-2) 0
- g sin 0 1 a hi For 9 ( 90,
K = 1/ (2 sin') (II-3) I L- $} K = Constants for a given 6 angle See Table II-1. g g IT 8 Where W = Fillet Wald Size, (in.) %j Te= Effective Throat, (in.) k ". 8 1 For e = 90 both Eq. (II-2) and Eq. CII-3) result in f3 K = 0.707.
- 7..g 1
A 1 I$ Q $1 a 1 l lj 6 1/ 2 2/ff d l'ZVIS".D 7 F PtA"XED "TF6 MA/ 6 g A 5/2//79 Tesued far Ur-M NG Mu he. DATE R EVISIONS sv CWst APPM ominam .cs me. Pine.cuenort Plant l, DESIGN OF FILLET WELDS In s truerron-- -nee 'Desivu gl0 FOR SKEWED T-JOINTS No. 20 lf .FPD/PSG swetT t o' 3 4.t.assen E 3 21 (3 741 I
l~ a. _................ - --- -. ,u ~ j ~, m ~ ~ ~~ " ~ ~ - U, +.; %,:, % : n l-: . ~+ n f W s'!% " W k f $ l 0 N' Q S Y ' TABLE II-1 Ja e K
- e K
] EE U.E 30 1.932 150 0.518 {e.j 3 53.., 1.663 145 0.524 5 3 40*4EJ, 1.307 1.462 140 0.532 u s 4 5 s, 135 0.541 Sh 50 t.' 1.183 130 0.552 j5i 55 1.083 125 0.564 2 gen = srmf7 w N. $E 65 0.931 115 0.593 i 70 0.872 110 0.610 g? g. 80 0.778 100 0.653
- [
90 0.707 90 0.707 .I[ 's 83 ai t*
- y III.
DESIGN 50 l' It can be seen from Section II that the constant K for e .3 larger than 90 becomes smaller as e increases. This ji ai indicates the f[11et weld being less effective. For e smaller than 90, although* the constant K increases G. .yi decreases, but the possibility of non-fusion increases g3 also. Therefore, the_9 anele should be limited to the rance from 30* to 150'. Wnerever e is less enan 6 0~, R1 4 reduce tne allowaole feree av 50%. gy i> .J I U1 5 ii @0 Example: Deter =ine the w0 fillet weld size for the "I A g connection shown. The
- 2 force in weld A & B is
,- }} } l* assumed to be 3.2 kips /in. irE. Use allowable force equal R1 -1 to 14.4 kips /in for size 1" R1 5 Minimum weld size = Force in 1" weld lencrth I, (K) (Allowaale force ) R1 e1 8 Wald A K = 0.532 from Table II-1 =b .l E 32 W get A= (0.a:32) (14. 4) = 0. 42", use 1/2" =; : f r-Weld B K = 1.462 e =-10 4,70, reduce allowable force R1 0 y by 50%. i8 3.2 W s-B= (1. 462 ) (14. 4/2) = 0. 30", use 5/16". l] a i in >- 2 p ee.e W NUMBER PRI No. 20 = - - - M SHEET 2 OF 3 DATE PL.u,'T cIS:mt a >= e.m
... w ? . r.fy, '. .931.... ; ;.1.;. - lAks ? < ' ': Y N t:h ;$fkhkiLS2l~&i::h$NM 'e ' c W i ' Z" ' '. ~ . ' r ;. ^i i J gj IV. USE OF GROOVE WELD As an alternative, groove welds may be used to replace ka fillet weld for e angle greater than 1200 This will
- f 3 reduce the weld metal, hence the welding time, but will j1 require additional time for preparing the joint before welding.
E.1 0 The following table may be used to deter =ine the required.l d. groove weld size with groove weld angle being 60 3 g% EnT -a Fillet Weld I! Size (in.) 3/16, 1/4 5/16, 3/8 1/2 5/8, 3/4 t .5 j* Groove Weld 4> Size (in.) 3/16 1/4 3/8 1/2 5 3 1 ;- 2 ~?, ie .s s. _3 .a h.? Qo. Rt~ .51 .1 :
- 1
=. - u!
- 'I i
EXAMPLE 0F GRCOVE WELD ,.s E* 11, .I 3 8 .s Ja *. t 3 I j Isi-40 5 o _...- --NUMBEn PSI No. 2 0 SHETT 3 0F 3 .._.__.j _.. _.. ~ 0 ATE $~ PLANT ~ DESIGN _Es 22,M 14). - _ _ _ _ _ _ _ _ - - _. -. _ _ _ _ _ _ _ _ - - _ _. - - -. - - - - - - -}}