1、 AEROSPACE STANDARD CLAMP, LOOP TYPE, CUSHIONED SUPPORT AS5874Copyright 2015 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, electronic, mechanical, photocopying, recording, or otherwise,
2、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 2008-02REAFFIRMED2015-04THIRD ANGLE PROJECTION CUSTODIAN: G-3
3、 FEDERAL SUPPLY CLASS 5340AS5874 SHEET 1 OF 5 PROCUREMENT SPECIFICATION: NONESAE Technical Standards Board Rules provide that: “This report ispublishedby SAE toadvance thestate of technicalandengineering sciences. Theuse ofthisreportis entirelyvoluntary, andits applicability and suitability forany p
4、articular use,including any patent infringement arising therefrom, is thesole responsibilityoftheuser.”SAE reviews eachtechnicalreport at least every five years at which time itmay berevised,reaffirmed, stabilized, orcancelled. SAE invites yourwrittencomments andsuggestions. SAE values your input. T
5、o provide feedbackon this Technical Report, please visit http:/www.sae.org/technical/standards/AS5874 RATIONALE AS5874 HAS BEEN REAFFIRMED TO COMPLY WITH THE SAE FIVE-YEAR REVIEW POLICY. FIGURE 1 AEROSPACE STANDARD AS5874 SHEET 2 OF 5 CLAMP, LOOP TYPE, CUSHIONED SUPPORT TABLE 1 BASIC NO. AS5874 SIZE
6、 CODE (C) 0D /1/ E .032 /2/ (J) R RADIUS +.010 T TOLERANCE PER AMS 2242 (Y) ASXXXXF2( ) .192 .125 .468 - .090 .020 .325 ASXXXXF3( ) .224 .188 .499 - .090 .020 .325 ASXXXXF4( ) .255 .250 .530 .235 .090 .020 .325 ASXXXXF5( ) .286 .312 .561 .235 .090 .020. .325 ASXXXXF6( ) .318 .375 .592 .235 .090 .020
7、 .325 ASXXXXF7( ) .349 .438 .624 .235 .090 .020 .325 ASXXXXF8( ) .380 .500 .655 .235 .090 .020 .325 ASXXXXF9( ) .423 .562 .741 .256 .125 .032 .368 ASXXXXF10( ) .454 .625 .772 .256 .125 .032 .368 ASXXXXF11( ) .486 .688 .804 .256 .125 .032 .368 ASXXXXF12( ) .517 .750 .835 .256 .125 .032 .368 ASXXXXF13
8、( ) .548 .812 .866 .256 .125 .032 .368 ASXXXXF14( ) .580 .875 .898 .256 .125 .032 .368 ASXXXXF15( ) .611 .938 .929 .256 .125 .032 .368 ASXXXXF16( ) .642 1.000 .960 .256 .125 .032 .368 ASXXXXF17( ) .681 1.062 1.001 .262 .125 .040 .370 ASXXXXF18( ) .712 1.125 1.032 .262 .125 .040 .370 ASXXXXF19( ) .74
9、4 1.188 1.064 .262 .125 .040 .370 ASXXXXF20( ) .775 1.250 1.095 .262 .125 .040 .370 ASXXXXF21( ) .806 1.312 1.126 .262 .125 .040 .370 ASXXXXF22( ) .838 1.375 1.158 .262 .125 .040 .370 ASXXXXF23( ) .869 1.438 1.189 .262 .125 .040 .370 ASXXXXF24( ) .900 1.500 1.220 .262 .125 .040 .370 ASXXXXF32( ) 1.1
10、50 2.000 1.470 .262 .125 .040 .370 MATERIAL BAND: PH=17-7 PH. CORROSION RESISTANT STEEL PER MIL-S-25043 OR AMS 5528. STRESS RELIEVE AND HEAT TREAT TO TH1100 CONDITION PER MIL-H-6875 OR AMS-H-6875, AFTER FORMING. CUSHION /13/ MOLDED, FABRIC REINFORCED /15/ FLUOROSILICONE RUBBER PER AMS-R-25988, TYPE
11、II, CLASS 1, GRADE 60, COLOR: ROYAL BLUE FINISH: BAND: CRES, TYPE 17-7; PASSIVATE PER AMS-QQ-P-35, TYPE II CUSHION: NONE CUSHION MATERIAL CODE: F= FLUOROSILICONE BAND MATERIAL AND LOCKING FEATURE CODE: H = TYPE 17-7PH CRES WITHOUT LOCKING FEATURE L= TYPE 17-7PH CRES WITH LOCKING FEATURE /18/ PROCURE
12、MENT: THE LOOP CLAMPS DEFINED HEREIN SHALL MEET THE REQUIREMENTS DEFINED IN NOTES /12/ /17/ AEROSPACE STANDARD AS5874 SHEET 3 OF 5 CLAMP, LOOP TYPE, CUSHIONED SUPPORT EXAMPLE OF APPROVED NUMBER CALLOUT AS5874 F 16 H = CLAMP, LOOP, 1.000 NOMINAL TUBE SIZE, MOLDED FABRIC REINFORCED FLUOROSILICONE ELAS
13、TOMER CUSHION WITH INTEGRAL WEDGE, 17-7PH CRES BAND, NO LOCKING FEATURE BAND MATERIAL CODE DIA. IN 16 THS CUSHION MATERIAL CODE BASIC PART NUMBER TABLE 2 - PHYSICAL PROPERTIES UNLESS OTHERWISE SPECIFIED, RESULTS ARE AN AVERAGE OF 5 SPECIMENS. TOLERANCE ON TEMPERATURE IS 5 F. FLUID COMPATIBILITY ALLO
14、WABLE CHANGE FROM ACTUAL ORIGINAL PROPERTIES AFTER:TEST TEST REQUIRED FUEL HYDRAULIC DIP TEST (1) METHOD ORIGINAL IMMERSION IMMERSION MIL-DTL-5624 JP-4 MIL-H-5606 168 HOURS AT 100 /11/ 70 HOURS AT 156 F /11/ HARDNESS, DUROMETER “A“ ASTM D 2240 55 TO 65 (4) 65 TO 75 60 TO 75 65 TO 80 TENSILE STRENGTH
15、-PSI ASTM D 412 (2) 720 MIN 640 MIN 610 MIN 680 MIN ELONGATION-% ASTM D 412 (2) 155 MIN 155 MIN 170 MIN 120 MIN TEAR STRENGTH-PPI ASTM D 624, DIE B 240 MIN 250 MIN 235 MIN 230 MIN SPECIFIC GRAVITY ASTM D 471 AS MEASURED (3) - - - VOLUME CHANGE-% ASTM D 471 1. AFTER CONDITIONING - +15% MAX +10% MAX 5
16、% MAX 2. AFTER 24 HOURS AIR DRY - +5% MAX +5% MAX +5% MAX (1) DIP TEST: TEST SAMPLES SHALL BE DIPPED IN P-D-680 SOLVENT AND ALLOWED TO DRY AT ROOM TEMPERATURE FOR 24 HOURS. THIS PROCEDURE SHALL BE REPEATED 10 TIMES. (2) TESTS SHALL BE CONDUCTED IN ACCORDANCE WITH ASTM D 412 ON THE FABRIC REINFORCED
17、CUSHION TEST SPECIMEN (1/2 INCH , WIDE STRIPS CUT FROM ACTUAL CUSHIONS WITH FABRIC WEAVE AT 45 INCHES TO THE DIRECTION OF PULL). THE TENSILE STRENGTH AND PERCENT ELONGATION SHALL BE MEASURED WHEN THE FABRIC REINFORCING MATERIAL BEGINS TO SEPARATE FROM THE ELASTOMER. TENSILE STRENGTH WILL BE BASED ON
18、 OVERALL THICKNESS OF RUBBER AND FABRIC REINFORCING MATERIAL. SPECIMEN FAILURES DUE TO FABRIC SEPARATION AT THE TEST FIXTURE JAWS SHALL BE DISREGARDED AND ANOTHER SAMPLE TESTED. (3) THE PERMISSIBLE VARIATION IN SPECIFIC GRAVITY DURING ACTUAL PRODUCTION FOR THAT VALUE ESTABLISHED IN FIRST ARTICLE TES
19、TS SHALL BE .03. (4) TABULATED HARDNESS RANGE APPLICABLE TO THE AS RECEIVED, NON-SUPPORTED CONDITION. THE REQUIRED HARDNESS, RANGE FOR THE AS MOLDED CONDITION IS 65 TO 80. NOTES: UNLESS OTHERWISE SPECIFIED /1/ DIAMETER “D” IS THE NOMINAL DIAMETER FOR WHICH A CLAMP SIZE IS INTENDED FOR USE. DIAMETER
20、“D” SHALL BE VERIFIED BY THE “DIAMETRAL RETENTION” TEST OF MIL-C-85052. /2/ DIMENSION “E” SHALL BE MEASURED WITH THE CLAMP INSTALLED ON A MANDREL OF “D” DIAMETER .001 AND A .0625 .0005 SPACER BETWEEN THE UPPER AND LOWER FEET. /3/ WEDGE SHALL BE REQUIRED ON SIZE -6 AND LARGER CLAMP CUSHIONS. THE WEDG
21、E SHALL BE MOLDED AS AN INTEGRAL PART OF THE CUSHION AND CONTOURED TO FIT “D” DIAMETER. WEDGE SHALL TOUCH LOWER/BASE PORTION OF CUSHION WHEN CLAMP IS INSTALLED ON MANDREL DEFINED IN PROCUREMENT SPECIFICATION AND WHEN THERE IS NO GAP BETWEEN BOTH CLAMP FEET. /4/ STIFFENING BEAD SHALL BE REQUIRED ON S
22、IZE -4 AND LARGER CLAMPS. SIZE -2 AND -3 CLAMPS USE A PLAIN JOGGLE ONLY. ALL RADII ON THE STIFFENING BEAD SHALL BE SMOOTH AND BLENDED. AEROSPACE STANDARD AS5874 SHEET 4 OF 5 CLAMP, LOOP TYPE, CUSHIONED SUPPORT 5. THIS DRAWING TAKES PRECEDENCE OVER ALL DOCUMENTS REFERENCED HEREIN. 6. METAL BAND SHALL
23、 HAVE ALL BURRS, SHARP EDGES, AND SCALE REMOVED. 7. DIMENSIONAL TOLERANCES AND SYMBOLS PER ANSI Y14.5M-1982. /8/ FIGURE IN PHANTOM SHOWS THE APPROXIMATE FREE STATE, I.E. THE “AS RECEIVED” POSITION/CONDITION OF THE CLAMP. /9/ REFERENCE DIMENSIONS “J” AND “Y” APPLY TO FEATURES INTENDED TO PROVIDE MAXI
24、MUM SUPPORT FOR THE LOWER FOOT BY CLOSELY FITTING THE UPPER FOOT BEND RADIUS TO THE STIFFENING BEAD BLEND RADIUS WHEN CLOSED AGAINST EACH OTHER. /10/ EXCEPT FOR CLAMP BAND SIZES -2, -3, AND -4, IDENTIFICATION SHALL BE THE COMPLETE VENDORS PART DESIGNATION AND MANUFACTURERS NAME (“UMP” IS ACCEPTABLE
25、OPTION FOR UMPCO) OR TRADEMARK OR CAGE CODE. IDENTIFICATION SHALL BE IMPRESSION STAMPED ON THE BAND IN AN AREA NOT COVERED BY THE CUSHION. ALL IDENFICATION SHALL BE LOCATED ABOVE THE TUBE/PAYLOAD THEORECTICAL CENTERLINE. IDENTIFICATION FOR CLAMP BAND SIZES -2, -3, AND -4 SHALL BE THE MANUFACTURERS N
26、AME (“UMP” IS ACCEPTABLE OPTION FOR UMPCO) OR TRADEMARK OR CAGE CODE AND THE SIZE DASH NUMBER. /11/ PROPERTY MEASUREMENTS SHALL BE PERFORMED IMMEDIATELY AFTER REMOVAL FROM THE IMMERSION BATH. /12/ IN ADDITION TO ADHERING TO THE APPLICABLE MATERIAL SPECIFICATIONS DEFINED HEREIN FOR THE CLAMP CUSHIONS
27、 AND CLAMP BANDS, THE CLAMP ASSEMBLIES (BAND AND INSTALLED CUSHION) ARE QUALIFIED BY PERFORMANCE AND SHALL HAVE SUCCESSFULLY COMPLETED THE PERFORMANCE TESTING REQUIREMENTS LISTED BELOW. THE MOLDED CUSHION MATERIAL SHALL SUCCESSFULLY COMPLETE THE FLUID COMPATIBILITY TESTING DEFINED WITHIN TABLE 2, PH
28、YSICAL PROPERTIES. DIAMETREL RETENTION PER MIL-C-85052. COMPRESSION SET PER MIL-C-85052, AIR AGE AT 212 F, NOT TO EXCEED 55 FOR AVERAGE OF 3 SPECIMENS. VIBRATION AND TRANSMISSIBILITY PER MIL-C-85052. HORIZONTAL BURN TEST PER FAR 25.853 (b-3). SPECIMEN/SLAB: APPROXIMATELY 3.00 (W) x 5.00 (L) MAXIMUM
29、BURN RATE: 2.5 INCHES PER MINUTE. RETENTION OF QUALIFICATION REQUIRES THAT EACH APPROVED VENDOR IN CONJUNCTION WITH THE CUSHION MOLDER PERFORM THE ABOVE DEFINED VIBRATION TESTING AND THE FLUID COMPATIBILITY TESTING DEFINED IN TABLE 2 NO LESS THAN ONCE EVERY (6) YEARS FROM THE COMPLETION DATE OF THE
30、INITIAL TESTING. /13/ CUSHION GEOMETRY SHALL BE EQUIVALENT TO THAT DEFINED BY MIL-C-85052/3. THE FABRIC REINFORCING MATERIAL SHALL BE MOLDED WITHIN THE CUSHION SUCH THAT IT IS ON THE BAND SIDE OF THE CLAMP CUSHION. THE LAY OF THE FABRIC WEAVE SHALL BE ORIENTED AT A 45 ANGLE AS SHOWN BELOW: /14/ WHEN
31、 MIL-C-85052/4 CLAMP SUPPORTS ARE USED. MAXIMUM TUBE OVERHANG SHALL BE 1/2 TUBE OD. NOTE: THE SUPPORT CAN BE DETRIMENTAL IF THE CLAMP IS NOT FULLY SUPPORTED. AEROSPACE STANDARD AS5874 SHEET 5 OF 5 CLAMP, LOOP TYPE, CUSHIONED SUPPORT /15/ THE FABRIC SUPPORT MATERIAL SHALL BE EQUIVALENT TO THAT USED I
32、N THE FABRICATION OF QUALIFIED M85052/3 CLAMP CUSHIONS. 16. ALL ASPECTS OF PRODUCTION CLAMP ASSEMBLY FABRICATION SHALL BE IN STRICT ACCORDANCE WITH THE MATERIALS, PROCESSES, AND SOURCES USED TO MANUFACTURE THE QUALIFIED CLAMP ASSEMBLIES. CUSHIONS SHALL BE MOLDED FROM A COMBINATION OF: RAW MATERIAL S
33、UPPLIER, FABRIC MANUFACTURER, WASH-COAT PROVIDER, AND CALENDARING OPERATION PROVIDER WHICH WAS USED TO PRODUCE CUSHIONS THAT, AS AN ASSEMBLY, SUCCESSFULLY COMPLETED THE PERFORMANCE TESTING AND PHYSICAL PROPERTIES REQUIREMENTS DEFINED HEREIN. /17/ EACH LOT OF FLUOROSILICONE CUSHION RAW MATERIAL SMALL
34、 BE CERTIFIED TO THE HARDNESS, TENSILE STRENGTH, ELONGATION, TEAR STRENGTH, AND SPECIFIC GRAVITY REQUIREMENTS DEFINED IN TABLE 2. /18/ LOCKING FEATURE SHALL BE ACCOMPLISHED BY A TONGUE-IN-BRIDGE METHOD LOCATED AT THE END OF THE CLAMP FEET. 19. A CHANGE BAR ( l ) LOCATED IN THE LEFT MARGIN IS FOR THE
35、 CONVENIENCE OF THE USER IN LOCATING AREAS WHERE TECHNICAL REVISIONS, NOT EDITORIAL CHANGES, HAVE BEEN MADE TO THE PREVIOUS ISSUE OF THIS DOCUMENT. AN (R) SYMBOL TO THE LEFT OF THE DOCUMENT TITLE INDICATES A COMPLETE REVISION OF THE DOCUMENT, INCLUDING TECHNICAL REVISIONS. CHANGE BARS AND (R) ARE NO
36、T USED IN ORIGINAL PUBLICATIONS, NOR IN DOCUMENTS THAT CONTAIN EDITORIAL CHANGES ONLY. DESIGN INFORMATION 1. THE LOOP CLAMPS DEFINED HEREIN ARE DESIGNED FOR NEW APPLICATIONS AND TO BE A DROP-IN REPLACEMENT OPTION FOR THE EQUIVALENT SIZE (DASH NUMBER) M85052/1 LOOP CLAMPS. THE FLUOROSILICONE CUSHION
37、MATERIAL DEFINED HEREIN PROVIDES A MORE ROBUST ABILITY TO RESIST CRACKS IN THE CUSHION MATERIAL CAUSED BY THE EFFECTS OF OZONE/UV AS COMPARED TO THE PERFORMANCE OF M85052/1, THE LOOP CLAMPS DEFINED HEREIN ARE INTENDED TO BE USED WITHIN THE FOLLOWING SYSTEMS: ALL AROMATIC FUEL SYSTEM APPLICATIONS REQ
38、UIRING A HIGH DEGREE OF CUSHION EXPOSURE TO SYSTEM FLUID. ALL FLUID AND ELECTRICAL SYSTEMS ON AIRCRAFT AND AEROSPACE VEHICLES USING PETROLEUM BASED HYDRAULIC SYSTEMS. NOTE: THE FLUOROSILICONE MATERIAL CUSHIONS USED ON THESE CLAMPS ARE NOT RESISTANT TO PHOSPHATE ESTER BASED FLUIDS (E.G., SKYDROL). 2. IT IS RECOMMENDED THAT THE LOOP CLAMPS DEFINED HEREIN BE INSTALLED IN ACCORDANCE WITH THE RECOMMENDED MOUNTING METHODS AND CORRESPONDING VIBRATION RATINGS PER ARP1897. 3. OPERATING TEMPERATURE RANGE: -65 F TO +275 F
