ML20105A782

Engineering Rept on Thermo-Lag 330-1 Fireproofing Coating Thicknesses Required for 1 & 2 Hour Fire Ratings for Various Structural Steel Members Used by Texas Utils Svcs,Inc

ML20105A782
Person / Time
Site:	Comanche Peak
Issue date:	08/14/1992
From:	WESSON & ASSOCIATES, INC.
To:
Shared Package
ML20104B933	List: ML20105A782 ML20105A798
References
NUDOCS 9209170244
Download: ML20105A782 (19)

Text

.

ENGINEERING REPORT ON i

THE THE.LMO-LAG 330-1 FIPIPR00FING COATING THICKNESSES REQUIRED FOR 1 AND 2 HOUR FIPI RATINGS FOR VARIOUS STRUCTURAL STEEL MEMBERS USED BY TEXAS UTILITIES SERVICES, INC.

Prepared for TS!, IMC.

3250 Brann:n Avenue St. Louis, MO 63139 l

l Sy 1.'es son and As sociates, Inc.

P. 3. Box 1082 Norman, Oklahema 73070 9209170944 920814 ATTACfiuCNT _d _ SHT l'8 /'d pDR ADOCK 0300 5_

,,j,gg,gn, Wr.ssoN AND Ass 9ct.*

INc.-

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ENO hIIAIMO REPCAT CN TFE T137.*:C-1A0 3 30-1 T3FJPRDCTINO COATINO THICrJ:I!!I5 rzgU:F13 TCR 1 AND 3 HOUR TIPI RAT 2N05 FCR VA.RICUS $7RUC7JFX, STIIL ME.$3ERS USED M TIXAS UTILIT:IS SERV!CES, INC.

8. INTPCDUCTION The purpose of this report is to present and surcarize t.he calculated Thum.

I,ag 330-1 rireproofing Coating thicknesses for the varicus stractural steel mem-bars that are used by Texas Utilities services, Inc.

The fireproofing coating thicknesses have been calculated for tvo fire expo -

sure tir.ess a cne (1) hour fire exposure and a three (3) hour fire ex;csure per lod. As diseassed in detail in Section III of this report, the fire exposure 1*

the cc=only accepted ASTM - E - 119 Test Method. Using this Test Method, the integrated average gncident Heat flux fer a one _(1) hour fire ex;csure is evaal to 24,300 27J/hr-ft

, a.nd the three (3) heur Incident Heat flu.x is eeaal to 42,000 BTU /hr-f t2 In' the Therro-Lag 330-1 Tireproofing Cocting thicknesses presented herein, the f elicsir.g structural steel ree.::er sizes and shapes, as well as the noted stractural steel te perature limits were censidered in the applicable heat transfer ani.ises:

S T RU "".'*AI. u.I.'T t *4 MAXI.**JM SUTJACI TEeFr?A-JKI C7 Sivare Structural Tu.bing 1000 Rectangular Stract. tral 'Nbi.ng 1000 Angles 1000 chan.els 1000 Wide Tianges-1000 Unistrat sections-All Typ-LAC 330-1 TIFIPROCrillG CCATI!40 APPLIED TO STET.CTUTM STEEL CCLUINS I

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ATTACHVENT _d SHT dW l cab' N0 p i' M # % e p

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fd -

l 4,'-.he firepr:cfing thickness require ents f:r varicus structural stcel Cha ects.

Tji r..cs, Tlat F1stes and Unistruts, as currently utilized by the Texas Utilities 3

services, Inc., that are ex;esed to hcsting c:nditi:ns en 'Beth Sides', the f actor (W) is expressed in tems of peunds ;ct staare f: t cf surf ace area using ene-half the plate. sect;en thickness, er angle thi:kness for calculation of the reet-ber weight per squate f:ot per linear f ct of length.

The re;crt reader is cautiened that the Therre-Lag 330-1 firepreofing c ating thicknesses re;crted herein are pretably the ' minim e ' fireprcofing coating thick-nesses that are available fr:n the ' passive ther al coatings' which have been i

cer.mercia11y ap;reved. Hence, if the ceating thi:knesses re;crted herein are l

they 'will not' be applicable to cther types of firepreefing ceating cater 2als.

g If other materials are censidered, the rewired thickness could vary f r:n F.oder-te increases ever the thicknesses presented herein to very large thickness increases, depending upcn the specific raterial teing c:nsidered.

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L ATTACHIAENT _ A SHI I !

CALC NO C ' S U # N48 Wtssos Axo AssocraTrs, Ixc.

. III. CE-"R.'t!NATICH CF '"*fE "r0UT*ED TI'TPRCCFINC COATING ?!!!CCCSS AS A FUNCT!CM OF THE r!R1: C X PC S U't: TIME PERICD

~

As ' discussed in the INTRC CCTICN to this report, both the ASTM - C - 119

-Test Hothed and the total incident heat fluxos resulting frem actual flam able liquid spill fires aro widely used for the determination of the required fire-proofing coating thicknesses for various structural steel members. Each of these two methods are discussed separately below.

A.

ASTM - E - 119 Test >'ethod

' HOTE:. For ease of reference, Appendix (E) presents a copy of the ASTM - E - 119 Test Method.

The ASTM - E - 119 Test Method ut111res a specific Time-Te perature Re-lationship for testing of the fire rasistive capabilities of the various fire-proofing coating materials. TMs Time-Temperature Felationship is presented b.

Figure 3.

As shewn, the Test Set-up Internal Air Temperature star prevailingar.bientairteeperature,reachesater;eratureof1700gsatthe r at the eno of the first hour of exposure, a temperature of ig50 'r at the end of the second hour of exposure and a temperature of about 1950 F at the end of the third hour s

of expcsure.. As such, this Ti.e-Temperature History DCES :lCT fairly represent the

• i=e-Temperature Relationship for a typical flammable liquid hydrecarbon spill fire wherein the temperature within the fis es rene may very quickly (within a few SECCNDS) reach a value of 2200 t or more depending en the specific fuel.

Thus, as :such the AST:t - E - 119 Test Methed dcas not previde a uniform target ineident heat flux, as would a typical hydrecarben spill fire.. Ter this reason, many Insurance Underwriters' require a long tem (up to three hcurs) Tira Rati.g when applying the AST:1 - E C 119 Test Method to hydrocarbon Processing racilities.

Hevover, using accepted engineering practices, the Tigure-1 Tire-Te perature Relationship can be converted to a Heat T1ux-Tire Relationship. Such a relatien-ship for the AST:t - E-- 119 Tese Methed is presented in Figure 4.

Aa shown, the 2

Time Averaged Heat Tiux for the first hour of ex;csure is equal to 24,500 ETU/MA-r?,

the:Tir.e Averaged Incidenj Heat Tiux fer the first t 2. hours of fire exposure is

. equal to & 5CO BTU /IIR-TT and the Time Averaged Tetal Incident Heat (lux fer the first three hours of fire exposure is equal to about 4 2,0 00 37.',/HR-TT".

Usino th!s

. hasis of Tire Averaged Incident 1: eat flux, the fire resistive capstilitie s ei a given firepicoting material to an equivalent hydrocarben spill fire can be cttainec 3.

Hvdiccarten Pool Fire Total Feat'Fluxest It WST be emphasized that all hydro-arbon liquid spill fires CC NCft

,1Gstrate the-sa e total heating effects.- As shewn by Table I, different liquid-

hydrocarben ' spill fires have ve ry different heating ef fcets.

For example, a spill

-87J/HR-TT}ving Methanol will only yield a total incident heat flux of about 12,gc0 fire invo

,.while a spill fire involving LPO cculd yield up to 40,000 ETU/HpFT l

for large diar.eter spill fires (fire diameters in excess of_10 meterst.

E Since the Total !! vat Flux, "T" appears as a linear ter 2 in Equations (3) and (4), it is: very important to know the type of flarrabic liquid hydrocarton spill fire fer the determination of the required fireprcofing material thickness.

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ATTACHENT g.J-MH/.a.13 Jo Spuest.o41 - XG7J 1Y3H 1?t30!O!it (A(C gQ,N/8-JI'AO S

7

(?/:

.y.

i!. Incidem Fest Tiuxes Ter Texas t*tilities ferv!:es. Inc.:

In ace:rdance with the directions frem 75%

Inc., we have used the follev-ing Ine dent Host T1uxes ter the fireproofir.g c: stir.g thickness retairene.t r.

as repcrted herein:

Cne (1) Hour fire Pating:

The one (1) Hour fire Rating has heer, based upcn the Incident Heat T1ux Level arseciatel with a ene (1) hour exposure to the As;M-E-219 Test Method, as shewn by Tigure 1. As shev,

the integrated incident hest flu for one

'i' hour's expcsure to the AST1-E-119 Test Met' 2

eraates to 24,500 BW/hr-f t,

Three (3) Hour Tire Rating: The Three (3) Hour fire Rating has also been based upon the Incident Heat T1u :.evel Asser-1ated with 'a three (3) hour ex;csure to the ASTM-E-119 Test Methed, as also she-m in Tigare

1. As shevn, the integrated in:ident heat fi.x fer three (3) hour's ex; sure tn the A5 :t-E.

119 Test Method er;stes to 4!,I:0 ET*.'/hr-ft2, 1

i.

ATTACHMENT _ A SHI 2-

'N

-lo.

CALC NO W i~' M %

l c'

WF. MON A ND A$Sor *A*'

.= C.

I'

IV. 577ce-".'PA:. 5 Trt Mrr.stR PI1';:FI r:nzrpe:r:N COAT Nd -u!CYJ:Essrs A ccmplete listing of the calculated Ther-o-Lag 330-1 firepr:ofing cua,

thicknesses f r each of the structural steel ca:ters as specified in the letter frem Texas Utilities Services, Inc. te TSI, Inc., dated 9 July 1981, is pre-sented in Appendix (A) to this report.

One (1) and Three (3) Itour fire Rating thicknesses for Square Structural Tubing, Pectangular structural Tubing, A.gles, Channels, Wide flange Bea.s eno a wide variety of Unistruts are presented. The physical properties for the Uni-strut Ne 1ers'was taken directly frem "U::ISTRUT, General Engineering Catalog

'M.

9" forwarded to TsI, Inc. by Texas Utilities services, Inc., and reforwarced us by T$2, Inc.

It should be er;hasized that the Appendix (A) calculated Thermo-Lag 330-1 fireproofing ceating.aterial thicknesses dc !:07 include a 10 percent aging ar.d weathering allevance in acccrdance with the icng term Envirer..antal Test Freq %.s cenducted by Underwriters' Laborateries, U.S. Ar y Ballistics Peseareb 1.at.-

oratories a'nd ccm.ercial users in the Hydrocarben'(011 and Cas) Processing Industries. Te previde aging and seather alic

.ce, ceating thickner.ses of Appendix (A) s/.cu,,d he increased by 10 percent.

s Prepared By:

/ / $

gwV Dr. H. R. Vesson. PE i

President Vesson & Associates. Inc.

ADACHMENT _ d SHI 5

CALC 80. S M S

• 0 ?5 pg WEsso" 3No AssoctaTrs, INc.

APPENDfX (A)

CAte".N:T3 TVIP.90-LA0 3 30-1 rtRIPPCCr:t:0 C0ATf ?:0 THICKirrtsts TCR T5I/*USI 5TR'.!"WML 5TIIL MD:tIP5 1 Hr. s 3 Hr. ASTP. 119 Tireratings for structural Steet 2

1 Hr. exposures r = 24,500 4tu/hrft (ti.me-avera ed) 3 Hr. exposures r

• 42,000 Btu /hrft (time-averaged)

APPLICASLE COPSILATICt:5 FCR CCATINO THICctE55:

1.

Structural Beams:

1/1.72 g37) g)0.5

( 1.514 T=

2.

Pipe, Tubing, Plates 1/1.3356 7

7=

[

--i

( AT) g

• 7 (W) g,3 23.002 2.

50'.*A?.I STRUC :! PAL WB!!!O 47 = 1000 70 930*y Coating thickness (in.)

Site Ib/ft ft /ft W(1b/f t)

1. hour 3-hour _

2x2x3/16 4.31 0.66 6.47 0 165 0.642 x1/4 5.40 0.66 8.10 0.147 0.574 3x3x3/16 6.86 1.00 6.86 0.160 0.623 xl/4 8.80 1.00 8.80 0.141 0.551 4x4x3/16 9.31 1.33 6.98 0.158 0.618 x1/4 12.02 1.33 9.02 0.139 0.544 x3/8 16.84 1.33 12.63 0.117 0.460 Ex6x1/4 18.82 2.00 9.41 0.136 0.533 x!/16 23.02 2.00 11.51 0.123 0.431 x3/8

~27.04 2.00 13.52 0.114 0.445 Ex5x3/8 36.83 2.66 13.81 0.113 0.440 x1/2 47.35 2.66 17.76 0.100 0.388 12:10x1/2 60.95 3.33 18.29 0.098 0.382 x5/8 79.26 3.33 23.78 0.086 0.335 II.

RICA'!O' LAR s' RUC JFAL TtJBINO:

at = 1000 - 70 = 930'T Coating thickness (in.)

2 size Lb/ft ft /ft W(1b/f t)

1. hour 3-hour 8x4x5/16 23.02 2.00 11.51 0.123 0.482 xJ/8 27.04 2.00 13.52 0.114 0.444 6x4x3/8 21.94 1.66 13.16 0.115 0.450 x1/2 27.68 1.66 16.61 0.103 0.400 w

cacsf;pz d- @ "v7G.

A-1

[/8

.',. e s n v avn A een, o, n 1 o,-

!!I.

ArcLIsi AT = 1000 930*T Notes exposure to both surfaces assumed Coating thi:kness (in.)

p1 thk (in.)

LT = 930'T Sire (50%

lec)

W(ib/ft )

1-heur 3-heur 3x3x3/8 3/16 7.65 0.151 0.590 3\\x3hx3/8

$/16 7.65 0.151 0.590 x1/2 1/4 10.20 0.131 0.511 4 x 4 x 2,'8 3/16 7.65 0.151 0.590 x1/2 1/4 10.20 0.131 0.511 5x5x3/4 3/8 15.30 0.107 0.417 x1 1/2 20.40 0.092 0.361 6x6x3/4 3/8 15.30 0.131 0.417 x1 1/2 20.40 0.092 0.361 ex6x1/2 1/4 10.20 0.131 0.511 x1 1/2 20.40 0.092 0.361 6x4x3/8 3/16 7.65 0.151 0.590 x1/2 1/4 10.20 0.131 0.511 x1 1/2 20.40 0.092 0.361 IV.

CHvr:TLS Coatir.g thi:kness (in.)

W(1b/ft )

AT =

930*T Site web thk (in.1

(! s -eh thk) 1-heur 3-hour M 3x7.1 0.321 6.543 0.164 0.638 C 3x4.1 0.170 3.46a 225 0.817 C 4x5.4 0.180 3.672 218 0.852 x7.25 0.320 6.525 0.164 0.639 C 6x0.2 0.200 4.os:

0.207 0.808 x10.5 0.314 6.406 0.165 0.646 C ex11.5 0.220 4.4sg 0.197 0.771 C10x15.3 0.240 4.896 0.*

0.73!

V. WTOE FLA':CES :

AT = 1000 - 70 = 930*r Coating thickness (in.)

Si:e W(1b/f t) 1-hour 3-hour W 4x13 13 0.169 0.739 W 5x16 16 0.152 0.666 x18.5 18.5 0.141 0.619 W 6xB.5 8.5 0.209 0.913 x15.5 15.5 0.155 0.676 W ex10 10 0.192 0.842 x13 13 0.169 0.739 x1's 15 0.157 0.638 x24 24 0.124 0.544 0.115 0.503 x28 20 W 10x11.5 11.5 0.179 0.755 x15 15 0.157 0.688

~19 29 0.113 0.495 A-2 ATTACHENT 4 SHT /A/0 CALC NO OI/ M S ' D EA

.ssnv svn.\\ c enen tr e (vr 77/c

s VI.

tNIs-te tr ~ ::.:.

AT. 1000 - 70 = 920*T Coating thickness (in.)

2 W(1h/ft )

47 - 930*T Sire p1 thk (50g p1 thk) 1-hour 3-heur P 1000 0.105 0.288 0.283 1.104 1001 0.105 0.288 0.283 1.104 1001 C3 0.105 0.288 0.283 1.104 1004 A 0.105

• 288 0.283 1.104 P 300,0 0.105 0.288 0.283 1.104 3001 0.1c5 0.288 0.283 1.104 P 5C00 0.105 0.288 0.283 1.104 3001 0.105 0.288 0.283 1.104 o

O A*3 ATTACHMENT [

SHI 2' Dko calc so ory-re-wm, '

W esso x.4.... Assoc.aTr s. T s c.___ __ __. _. _