SAE AS 642A-2011 HOSE ASSEMBLY POLYTETRAFLUOROETHYLENE METAL BRAID MEDIUM PRESSURE FLARED STRAIGHT TO 90 《直对90扩口中等压力金属编织聚四氟乙烯软管总成》.pdf

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1、 AEROSPACE STANDARD HOSE ASSEMBLY, POLYTETRAFLUOROETHYLENE,METAL BRAID, MEDIUM PRESSURE, FLARED, STRAIGHT TO 90 AS642Copyright 2011 SAE International All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electron

2、ic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-4970 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org ISSUED 2007-0

3、3REVISED 2011-06THIRD ANGLE PROJECTION CUSTODIAN: SAE G-3/G-3D REV.A FEDERAL SUPPLY CLASS AS642 SHEET 1 OF 7 REV. A PROCUREMENT SPECIFICATION: /15/ AS1946SAE Technical Standards Board Rules provide that: “This report ispublishedby SAE toadvance thestate of technicalandengineeringsciences.The useofth

4、is reportisentirelyvoluntary, andits applicability and suitability forany particular use,including any patent infringement arising therefrom, isthe soleresponsibilityofthe user.”SAE reviews eachtechnicalreportat least every five years at which time itmay bereaffirmed,revised,orcancelled.SAE invites

5、yourwrittencomments andsuggestions. SAE values your input. To provide feedbackon this Technical Report, please visit http:/www.sae.org/technical/standards/AS642A RATIONALE ESTABLISH CUFF DIMENSIONAL REQUIREMENTS FOR INTEGRAL FIRE SLEEVE ON HOSE AND SLEEVE CODE H & J CONFIGURATIONS, FOR STANDARIZATIO

6、N PURPOSES. FIGURE 1 - HOSE ASSEMBLY FIGURE 2 - ABRASION SLEEVE ATTACHMENT /7/ /8/ FIGURE 3 SEE TABLE 7 /26/ AEROSPACE STANDARD AS642 SHEET 2 OF 7 REV. A HOSE ASSEMBLY, POLYTETRAFLUOROETHYLENE, METAL BRAID, MEDIUM PRESSURE, FLARED, STRAIGHT TO 90 TABLE 1 - DIMENSIONS HOSE ASSEMBLY NO. & SIZE /24/ HO

7、SE SIZE (REF) FITTING TYPE /25/ FITTING MATL /5/ THREAD T PER AS8879 (REF) HOSE ID MIN (REF) A1 MAX A2 MAX C MIN BALL DIA ELB/STR /16/ E MAX WITHOUT SLEEVING /17/ F HEX (REF) G MIN G MAX AS642D (-03) AS642D (-03) AS642D (-03) .188 .188 .188 - S E - CRES AL TI CRES AL TI - .3750-24UNJF-3B .3750-24UNJ

8、F-3B .3750-24UNJF-3B .4375-20UNJF-3B .4375-20UNJF-3B .4375-20UNJF-3B - .110 .110 .110 .110 .110 .110 - 1.14 1.14 1.14 1.14 1.14 1.14 - 1.56 1.56 1.56 1.56 1.56 1.56 - .068/.072 .068/.072 .068/.072 .068/.072 .068/.072 .068/.072 - .49 .49 .49 .49 .49 .49 - .500 .500 .500 .562 .562 .562 - .510 .510 .51

9、0 .510 .510 .510 - .680 .680 .680 .635 .635 .635 AS642E (-04) AS642E (-04) AS642E (-04) .250 .250 .250 R S E CRES AL TI CRES AL TI CRES AL TI .3750-24UNJF-3B .3750-24UNJF-3B .3750-24UNJF-3B .4375-20UNJF-3B .4375-20UNJF-3B .4375-20UNJF-3B .5000-20UNJF-3B .5000-20UNJF-3B .5000-20UNJF-3B .173 .173 .173

10、 .173 .173 .173 .173 .173 .173 1.14 1.14 1.14 1.14 1.14 1.14 1.26 1.26 1.26 1.56 1.56 1.56 1.56 1.56 1.56 1.62 1.62 1.62 .068/.072 .068/.072 .068/.072 .112/.119 .112/.119 .112/.119 .112/.119 .112/.119 .112/.119 .55 .55 .55 .55 .55 .55 .55 .55 .55 .500 .500 .500 .562 .562 .562 .625 .625 .625 .510 .51

11、0 .510 .560 .560 .560 .560 .560 .560 .685 .685 .685 .685 .685 .685 .840 .840 .840 AS642F (-05) AS642F (-05) AS642F (-05) .313 .313 .313 R S E CRES AL TI CRES AL TI CRES AL TI .4375-20UNJF-3B .4375-20UNJF-3B .4375-20UNJF-3B .5000-20UNJF-3B .5000-20UNJF-3B .5000-20UNJF-3B .5625-18UNJF-3B .5625-18UNJF-

12、3B .5625-18UNJF-3B .235 .235 .235 .235 .235 .235 .235 .235 .235 1.26 1.26 1.26 1.26 1.26 1.26 1.38 1.38 1.38 1.62 1.62 1.62 1.62 1.62 1.62 1.81 1.81 1.81 .112/.119 .112/.119 .112/.119 .164/.174 .164/.174 .164/.174 .164/.174 .164/.174 .164/.174 .63 .63 .63 .63 .63 .63 .63 .63 .63 .562 .562 .562 .625

13、.625 .625 .688 .688 .688 .560 .560 .560 .635 .635 .635 .635 .635 .635 .840 .840 .840 .840 .840 .840 .885 .885 .885 AS642G (-06) AS642G (-06) AS642G (-06) .375 .375 .375 R S E CRES AL TI CRES AL TI CRES AL TI .5000-20UNJF-3B .5000-20UNJF-3B .5000-20UNJF-3B .5625-18UNJF-3B .5625-18UNJF-3B .5625-18UNJF

14、-3B .7500-16UNJF-3B .7500-16UNJF-3B .7500-16UNJF-3B .298 .298 .298 .298 .298 .298 .298 .298 .298 1.38 1.38 1.38 1.38 1.38 1.38 1.61 1.61 1.61 1.81 1.81 1.81 1.81 1.81 1.81 1.99 1.99 1.99 .164/.174 .164/.174 .164/.174 .218/.230 .218/.230 .218/.230 .218/.230 .218/.230 .218/.230 .70 .70 .70 .70 .70 .70

15、 .70 .70 .70 .625 .625 .625 .688 .688 .688 .875 .875 .875 .635 .635 .635 .700 .700 .700 .700 .700 .700 .885 .885 .885 .885 .885 .885 1.060 1.060 1.060 AS642H (-08) AS642H (-08) AS642H (-08) .500 .500 .500 R S E CRES AL TI CRES AL TI CRES AL TI .5625-18UNJF-3B .5625-18UNJF-3B .5625-18UNJF-3B .7500-16

16、UNJF-3B .7500-16UNJF-3B .7500-16UNJF-3B .8750-14UNJF-3B .8750-14UNJF-3B .8750-14UNJF-3B .391 .391 .391 .391 .391 .391 .391 .391 .391 1.61 1.61 1.61 1.61 1.61 1.61 1.80 1.80 1.80 1.99 1.99 1.99 1.99 1.99 1.99 2.38 2.38 2.38 .218/.230 .218/.230 .218/.230 .289/.306 .289/.306 .289/.306 .289/.306 .289/.3

17、06 .289/.306 .83 .83 .83 .83 .83 .83 .83 .83 .83 .688 .688 .688 .875 .875 .875 1.000 1.000 1.000 .700 .700 .700 .810 .810 .810 .810 .810 .810 1.060 1.060 1.060 1.060 1.060 1.060 1.341 1.341 1.341 AEROSPACE STANDARD AS642 SHEET 3 OF 7 REV. A HOSE ASSEMBLY, POLYTETRAFLUOROETHYLENE, METAL BRAID, MEDIUM

18、 PRESSURE, FLARED, STRAIGHT TO 90 HOSE ASSEMBLY NO. & SIZE /24/ HOSE SIZE (REF) FITTING TYPE /25/ FITTING MATL /5/ THREAD T PER AS8879 (REF) HOSE ID MIN (REF) A1 MAX A2 MAX C MIN BALL DIA ELB/STR /16/ E MAX WITHOUT SLEEVING /17/ F HEX (REF) G MIN G MAX AS642J (-10) AS642J (-10) AS642J (-10) .625 .62

19、5 .625 R S E CRES AL TI CRES AL TI CRES AL TI .7500-16UNJF-3B .7500-16UNJF-3B .7500-16UNJF-3B .8750-14UNJF-3B .8750-14UNJF-3B .8750-14UNJF-3B 1.0625-12UNJ-3B 1.0625-12UNJ-3B 1.0625-12UNJ-3B .485 .485 .485 .485 .485 .485 .485 .485 .485 1.80 1.80 1.80 1.80 1.80 1.80 1.96 1.96 1.96 2.38 2.38 2.38 2.38

20、2.38 2.38 2.99 2.99 2.99 .289/.306 .289/.306 .289/.306 .366/.387 .366/.387 .366/.387 .366/.387 .366/.387 .366/.387 .97 .97 .97 .97 .97 .97 .97 .97 .97 .875 .875 .875 1.000 1.000 1.000 1.250 1.250 1.250 .810 .810 .810 1.091 1.091 1.091 1.091 1.091 1.091 1.341 1.341 1.341 1.341 1.341 1.341 1.591 1.591

21、 1.591 AS642K (-12) AS642K (-12) AS642K (-12) .750 .750 .750 R S E CRES AL TI CRES AL TI CRES AL TI .8750-14UNJF-3B .8750-14UNJF-3B .8750-14UNJF-3B 1.0625-12UNJ-3B 1.0625-12UNJ-3B 1.0625-12UNJ-3B 1.3125-12UNJ-3B 1.3125-12UNJ-3B 1.3125-12UNJ-3B .615 .615 .615 .615 .615 .615 .615 .615 .615 1.96 1.96 1

22、.96 1.96 1.96 1.96 2.32 2.32 2.32 2.99 2.99 2.99 2.99 2.99 2.99 3.24 3.24 3.24 .366/.387 .366/.387 .366/.387 .466/.493 .466/.493 .466/.493 .466/.493 .466/.493 .466/.493 1.17 1.17 1.17 1.17 1.17 1.17 1.17 1.17 1.17 1.000 1.000 1.000 1.250 1.250 1.250 1.500 1.500 1.500 1.091 1.091 1.091 1.341 1.341 1.

23、341 1.341 1.341 1.341 1.591 1.591 1.591 1.591 1.591 1.591 1.715 1.715 1.715 AS642M (-16) AS642M (-16) AS642M (-16) 1.000 1.000 1.000 R S E CRES AL TI CRES AL TI CRES AL TI 1.0625-12UNJ-3B 1.0625-12UNJ-3B 1.0625-12UNJ-3B 1.3125-12UNJ-3B 1.3125-12UNJ-3B 1.3125-12UNJ-3B 1.6250-12UNJ-3B 1.6250-12UNJ-3B

24、1.6250-12UNJ-3B .851 .851 .851 .851 .851 .851 .851 .851 .851 2.32 2.32 2.32 2.32 2.32 2.32 2.37 2.37 2.37 3.24 3.24 3.24 3.24 3.24 3.24 3.68 3.68 3.68 .466/.493 .466/.493 .466/.493 .661/.700 .661/.700 .661/.700 .661/.700 .661/.700 .661/.700 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.52 1.250 1.250 1.

25、250 1.500 1.500 1.500 1.812 1.812 1.812 1.341 1.341 1.341 1.465 1.465 1.465 1.465 1.465 1.465 1.715 1.715 1.715 1.715 1.715 1.715 2.122 2.122 2.122 AS642N (-20) AS642N (-20) AS642N (-20) 1.250 1.250 1.250 R S E CRES AL TI CRES AL TI CRES AL TI 1.3125-12UNJ-3B 1.3125-12UNJ-3B 1.3125-12UNJ-3B 1.6250-1

26、2UNJ-3B 1.6250-12UNJ-3B 1.6250-12UNJ-3B 1.8750-12UNJ-3B 1.8750-12UNJ-3B 1.8750-12UNJ-3B 1.101 1.101 1.101 1.101 1.101 1.101 1.101 1.101 1.101 2.37 2.37 2.37 2.37 2.37 2.37 2.40 2.40 2.40 3.68 3.68 3.68 3.68 3.68 3.68 4.17 4.17 4.17 .661/.700 .661/.700 .661/.700 .850/.900 .850/.900 .850/.900 .850/.90

27、0 .850/.900 .850/.900 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 1.500 1.500 1.500 1.812 1.812 1.812 2.125 2.125 2.125 1.465 1.465 1.465 1.747 1.747 1.747 1.747 1.747 1.747 2.122 2.122 2.122 2.122 2.122 2.122 2.372 2.372 2.372 AS642P (-24) AS642P (-24) AS642P (-24) 1.500 1.500 1.500 R S - CRES AL

28、TI CRES AL TI - 1.6250-12UNJ-3B 1.6250-12UNJ-3B 1.6250-12UNJ-3B 1.8750-12UNJ-3B 1.8750-12UNJ-3B 1.8750-12UNJ-3B - 1.344 1.344 1.344 1.344 1.344 1.344 - 2.40 2.40 2.40 2.40 2.40 2.40 - 4.17 4.17 4.17 4.17 4.17 4.17 - .850/.900 .850/.900 .850/.900 1.063/1.125 1.063/1.125 1.063/1.125 - 2.28 2.28 2.28 2

29、.28 2.28 2.28 - 1.812 1.812 1.812 2.125 2.125 2.125 - 1.747 1.747 1.747 1.997 1.997 1.997 - 2.372 2.372 2.372 2.372 2.372 2.372 - AEROSPACE STANDARD AS642 SHEET 4 OF 7 REV. A HOSE ASSEMBLY, POLYTETRAFLUOROETHYLENE, METAL BRAID, MEDIUM PRESSURE, FLARED, STRAIGHT TO 90 TABLE 2 - TOLERANCES HOSE ASSEMB

30、LY LENGTH TOLERANCE UNDER 18 IN 18 TO 36 IN EXCLUSIVE 36 TO 50 IN EXCLUSIVE 50 IN AND OVER .125 .250 .500 1% TABLE 3 - HOSE AND SLEEVE CODES HOSE OR SLEEVE CODE SLEEVE MATERIAL TEMP. LIMIT F - A B C E F G H J K L (-) INDICATES HOSE ONLY, NO SLEEVE (AS1946) ABRASION SLEEVE TUBULAR (PTFE - AS1291 - CO

31、DE B) /7/ ABRASION SLEEVE COIL (NYLON AS1294) /8/ FIRE SLEEVE (AS1072 SIL-FG) (15 MIN) /9/ /10/ /14/ ABRASION SLEEVE SHRINK-ON (FEP) /12/ ABRASION SLEEVE SHRINK-ON (POLYOLEFIN AS1073 - CODE B) /12/ FIRE SLEEVE (AS1072 SIL-FG) (5 MIN) /9/ 10/ /13/ FIRE SLEEVE INTEGRAL SILICONE (AS1723) (15 MIN) /14/

32、/26/ FIRE SLEEVE INTEGRAL SILICONE (5 MIN) /13/ /26/ INTEGRAL ABRASION SLEEVE (BRAIDED) POLYESTER /11/ ABRASION SLEEVE COIL (PTFE - AS1293) /8/ 450 450 275 450 350 275 450 450 450 300 450 TABLE 4 - HOSE AND OUTSIDE SLEEVE DIAMETERS HOSE OR SLEEVE CODE TOLERANCE HOSE SIZE /6/ .188 HOSE SIZE /6/ .250

33、HOSE SIZE /6/ .313 HOSE SIZE /6/ .375 HOSE SIZE /6/ .500 HOSE SIZE /6/ .625 HOSE SIZE /6/ .750 HOSE SIZE /6/ 1.000 HOSE SIZE /6/ 1.250 HOSE SIZE /6/ 1.500 - A B C E F G H J K L MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN .285 .234 .390 .320 .339 .260 .692

34、.487 .301 .248 .341 .278 .692 .487 .641 .537 .641 .450 .378 .320 .375 .267 .347 .304 .473 .393 .409 .330 .692 .533 .375 .320 .411 .348 .692 .533 .641 .594 .641 .550 .430 .390 .445 .333 .417 .367 .524 .454 .472 .393 .780 .598 .438 .383 .474 .411 .780 .598 .704 .657 .704 .595 .499 .450 .508 .407 .500

35、.430 .620 .515 .535 .456 .840 .658 .507 .452 .547 .484 .840 .658 .766 .719 .766 .670 .559 .510 .571 .470 .614 .546 .715 .645 .669 .590 .970 .778 .635 .578 .663 .600 .970 .778 .891 .844 .891 .775 .665 .625 .687 .586 .799 .641 .818 .748 .767 .681 1.090 .891 .749 .679 .769 .699 1.090 .891 1.016 .949 1.

36、016 .875 .772 .726 .789 .681 .906 .766 .955 .870 .896 .810 1.220 1.016 .887 .811 .904 .834 1.220 1.016 1.141 1.074 1.141 .995 .887 .841 .914 .828 1.140 1.078 1.295 1.210 1.224 1.122 1.590 1.288 1.288 1.146 1.244 1.158 1.590 1.288 1.454 1.394 1.454 1.310 1.210 1.148 1.242 1.138 1.390 1.328 1.550 1.45

37、0 1.474 1.372 1.900 1.578 1.460 1.358 1.482 1.396 1.900 1.578 1.704 1.649 1.704 1.508 1.460 1.398 1.492 1.388 1.707 1.637 1.841 1.771 1.807 1.681 2.190 1.887 1.777 1.667 1.823 1.729 2.190 1.887 2.016 1.957 2.016 1.815 1.782 1.712 1.809 1.697 AEROSPACE STANDARD AS642 SHEET 5 OF 7 REV. A HOSE ASSEMBLY

38、, POLYTETRAFLUOROETHYLENE, METAL BRAID, MEDIUM PRESSURE, FLARED, STRAIGHT TO 90 TABLE 5 - HOSE WEIGHT MAX - ALL OTHERS REF HOSE OR SLEEVE CODE OR FITTING FITTING TYPE /25/ UNITS HOSE SIZE .188 HOSE SIZE .250 HOSE SIZE .313 HOSE SIZE .375 HOSE SIZE .500 HOSE SIZE .625 HOSE SIZE .750 HOSE SIZE 1.000 H

39、OSE SIZE 1.250 HOSE SIZE 1.500 - A B C E F G H J K L FIRESLEEVE CLAMP FITTING END A/D - CRES B/E - AL C/F - TI R, S, E R, S, E R, S, E LB/IN LB/IN LB/IN LB/IN LB/IN LB/IN LB/IN LB/IN LB/IN LB/IN LB/IN LB/EA LB/EA LB/EA LB/EA .005 .003 .001 .009 .001 .002 .009 .016 .016 .006 .003 .015 .040 - .024 .00

40、7 .004 .001 .009 .002 .002 .009 .018 .017 .008 .004 .016 .055 .019 .033 .008 .004 .002 .011 .002 .002 .011 .020 .018 .009 .004 .018 .075 .026 .045 .010 .006 .002 .012 .002 .002 .012 .023 .021 .011 .005 .019 .085 .029 .051 .012 .007 .003 .017 .003 .003 .017 .030 .027 .015 .008 .021 .155 .053 .093 .01

41、6 .008 .004 .018 .004 .003 .018 .037 .035 .018 .009 .023 .235 .080 .141 .020 .010 .004 .028 .006 .005 .028 .045 .042 .023 .011 .025 .330 .112 .198 .045 .014 .005 .030 .007 .006 .030 .085 .079 .050 .018 .029 .535 .182 .321 .058 .020 .006 .040 .007 .006 .040 .107 .100 .063 .022 .033 .995 .338 .597 .07

42、4 .045 .009 .047 .008 .007 .047 .132 .123 .081 .028 .037 1.370 .466 .822 TABLE 6 - SLEEVE LENGTH HOSE SIZE LENGTH .188, .250, .313, .375 .500, .625 .750, 1.000 1.250, 1.500 2.00 .25 2.50 .25 3.00 .25 4.00 .25 TABLE 7 - INTEGRAL FIRE SLEEVE CUFF DIMENSIONS /26/ HOSE SIZE (REF) K MAX L MAX .250 .313 .

43、375 .500 .625 .750 1.00 1.25 1.50 .90 .97 1.03 1.15 1.29 1.41 1.71 2.04 2.37 1.61 1.70 2.18 2.50 2.67 2.67 3.10 2.80 2.95 AEROSPACE STANDARD AS642 SHEET 6 OF 7 REV. A HOSE ASSEMBLY, POLYTETRAFLUOROETHYLENE, METAL BRAID, MEDIUM PRESSURE, FLARED, STRAIGHT TO 90 NOTES: 1. CONSTRUCTION AND PERFORMANCE:

44、AS1946, FITTINGS SHALL BE PERMANENTLY ATTACHED TO THE HOSE. 2. OPERATING CHARACTERISTICS: SEE AS1946. 3. MATERIALS: a. HOSE AND FITTINGS - PER AS1946 /5/ b. SLEEVES - SEE APPLICABLE STANDARDS, TABLE 3 /4/ STANDARD COUPLING NUTS SHALL BE IN ACCORDANCE WITH AN818, AS1790, OR AS4370 (AS1791 WIRE AS APP

45、LICABLE) AND MATE WITH AS4395 OR AS5309 FITTING ENDS. NONSTANDARD COUPLING NUTS MAY BE USED, PROVIDED THEY ARE FUNCTIONALLY EQUIVALENT, AND PROVIDED THEY CANNOT BE REMOVED FROM THE FITTING. NUTS SHALL MEET THE TORQUE TEST REQUIREMENTS PER AS1946. /5/ FOR THE ALUMINUM AND TITANIUM FITTINGS, THE BASIC

46、 MATERIALS ARE ALUMINUM AND TITANIUM BUT SOME OF THE COMPONENTS MAY BE STAINLESS STEEL. /6/ DIAMETERS ARE LISTED FOR CLAMP SELECTION. TUBULAR SLEEVES MAY NOT BE A PERFECT ROUND AND SHALL BE MEASURED WITH A DIAMETER MEASUREMENT TAPE. /7/ THE INSTALLED TUBULAR ABRASION SLEEVES AXIAL MOVEMENT ON THE HO

47、SE SHALL NOT EXCEED .05 IN. ENDS OF THE TUBULAR SLEEVE SHALL BE TERMINATED WITH A LENGTH OF AMS-DTL-23053/11 (FEP) CLASS 1 OR 2, COLOR CLEAR, PER TABLE 6 AND FIGURE 2. /8/ COIL ABRASION SLEEVES, WHEN ASSEMBLED ON A STRAIGHT HOSE, SHALL HAVE AN AVERAGE GAP BETWEEN COILS NOT EXCEEDING .05 in. DISPLACE

48、MENT OF THE COILS OF THE SLEEVE, CAUSING A GREATER GAP, SHALL NOT BE CAUSE FOR REJECTION IF THE COILS CAN BE REPOSITIONED TO MEET THE GAP REQUIREMENTS. ENDS OF THE COIL SLEEVE SHALL BE TERMINATED WITH A LENGTH OF HEAT SHRINKABLE SLEEVING IN ACCORDANCE WITH TABLE 6 AND FIGURE 2. CODE “B“ (NYLON COIL)

49、 ABRASION SLEEVES SHALL BE TERMINATED WITH AMS-DTL-23053/5 CLASS 1 OR 3, COLOR BLACK. CODE “L“ (COIL ABRASION) SLEEVES SHALL BE TERMINATED WITH AMS-DTL-23053/12, CLASS 1, COLOR TRANSPARENT, PTFE. (OPTIONAL FOR BOTH SLEEVES AMS-DTL-23053/11 (FEP) CLASS 1 OR 2, COLOR CLEAR). /9/ THE TABLE 4 SLEEVE DIAMETERS FOR AS1072 SLEEVES APPLY WHEN THE SLEEVE IS COMPRESSED, OR CLAMPED, TO CONTACT THE HOSE. IN THIS CASE, A WRINKLE MAY OCCUR OVER APPROXIMATELY 10% OF THE SLEEVE CIRCUMFERENCE. /10/ THE CUT ENDS OF THE FIRE SLEEVE SHALL BE SEALED USING RTV SILICONE RUBBER, PRIOR