1、 AEROSPACE STANDARD HOSE ASSEMBLY, POLYTETRAFLUOROETHYLENE, PTFE CRES REINFORCED, 204 C, 21,000 KPA, LIGHTWEIGHT BEAM SEAL, STRAIGHT TO 90, METRIC MA2172Copyright 2015 SAE International All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, i
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3、ESS: http:/www.sae.org ISSUED 1990-10REAFFIRMED2015-04THIRD ANGLE PROJECTION CUSTODIAN: G-3/G-3D FEDERAL SUPPLY CLASS 4270MA2172 SHEET 1 OF 5 PROCUREMENT SPECIFICATION: MA2007SAE Technical Standards Board Rules provide that: “This report ispublished by SAE toadvance thestate of technicalandengineeri
4、ng sciences. Theuse ofthisreport is entirelyvoluntary, andits applicability and suitability forany particularuse,including any patent infringement arising therefrom, isthe soleresponsibilityofthe user.”SAE reviews eachtechnicalreport at least every five years at which time itmay berevised,reaffirmed
5、, stabilized, orcancelled. SAE invites yourwrittencomments andsuggestions. SAE values your input. To provide feedbackon this Technical Report, please visit http:/www.sae.org/technical/standards/MA2172 RATIONALE MA2172 HAS BEEN REAFFIRMED TO COMPLY WITH THE SAE FIVE-YEAR REVIEW POLICY. FIGURE 1FIGURE
6、 2AEROSPACE STANDARD MA2172 SHEET 2 OF 5 HOSE ASSEMBLY, POLYTETRAFLUOROETHYLENE, PTFE CRES REINFORCED, 204 C, 21,000 KPA, LIGHTWEIGHT BEAM SEAL, STRAIGHT TO 90, METRIC TABLE 1TABLE 2TABLE 3AEROSPACE STANDARD MA2172 SHEET 3 OF 5 HOSE ASSEMBLY, POLYTETRAFLUOROETHYLENE, PTFE CRES REINFORCED, 204 C, 21,
7、000 KPA, LIGHTWEIGHT BEAM SEAL, STRAIGHT TO 90, METRIC TABLE 4TABLE 5NOTES:/1/ LENGTH “L” IS A FOUR DIGIT NUMBER OF WHICH THE FIRST THREE DIGITS DESCRIBE THE HOSE ASSEMBLY LENGTH IN WHOLE CENTIMETERS (CM), AND THE FOURTH DIGIT, THE FRACTION OF A CM IN MILLIMETERS (MM). LENGTH “L” IS MEASURED FROM “F
8、ACE OF SEAT” TO “FACE OF SEAT”. FOR LENGTH INCREMENTS AND TOLERANCES SEE TABLE 3./2/ A TRUE CIRCULAR CROSS SECTION IS NOT REQUIRED THROUGH THE FITTING I.D. HOWEVER, THE APPLICABLE BALL DIAMETER LISTED IN TABLE 1 SHALL PASS THROUGH THE END FITTING AFTER IT IS ATTACHED TO THE HOSE ASSEMBLY./3/ DISTANC
9、E ACROSS CORNERS OF THE COUPLING NUT MAY EXCEED THIS DIMENSION./4/ STANDARD COUPLING NUTS SHALL BE IN ACCORDANCE WITH MA2275 OR MA2276 AND MATE WITH MA2273 FITTING ENDS. NONSTANDARD COUPLING NUTS MAY BE USED PROVIDED THEY ARE DIMENSIONALLY AND FUNCTIONALLY EQUIVALENT AND PROVIDED THEY CANNOT BE REMO
10、VED FROM THE FITTING. NONSTANDARD NUTS SHALL MEET TORQUE TEST REQUIREMENTS PER MA2007./5/ DIAMETERS ARE LISTED FOR CLAMP SELECTION. TUBULAR SLEEVES MAY NOT BE A PERFECT ROUND AND SHALL BE MEASURED WITH A DIAMETER TAPE RULE (OFTEN REFERRED TO AS A PI-TAPE)./6/ TUBULAR ABRASION (TFE) SLEEVES SHALL HAV
11、E AN I.D. NO GREATER THAN HOSE O.D. + 1.27 MM. AXIAL MOVEMENT OF THE SLEEVE INSTALLED ON THE HOSE SHALL NOT EXCEED 1.27 MM. ENDS OF THE TUBULAR SLEEVE SHALL BE TERMINATED WITH A LENGTH OF MIL-I-23053/11 (FEP) CLASS 1 OR 2, COLOR CLEAR, PER TABLE 5 AND FIGURE 2.AEROSPACE STANDARD MA2172 SHEET 4 OF 5
12、HOSE ASSEMBLY, POLYTETRAFLUOROETHYLENE, PTFE CRES REINFORCED, 204 C, 21,000 KPA, LIGHTWEIGHT BEAM SEAL, STRAIGHT TO 90, METRIC NOTES (Continued):/7/ COIL ABRASION SLEEVES, WHEN ASSEMBLED ON A STRAIGHT HOSE, SHALL HAVE AN AVERAGE GAP BETWEEN COILS NOT EXCEEDING 1.27 MM. DISPLACEMENT OF THE COILS OF T
13、HE 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 5 AND FIGURE 2. CODE “B” (NYLON COIL) ABRASION SLEEVES SHAL
14、L BE TERMINATED WITH MIL-I-23053/5 CLASS 1 OR 3, COLOR BLACK. CODE “L” (COIL ABRASION) SLEEVES SHALL BE TERMINATED WITH MIL-I-23053/12A, CLASS 1, COLOR TRANSPARENT, PTFE. (OPTIONAL MIL-I-23053/11 (FEP) CLASS 1 OR 2, COLOR CLEAR.)/8/ THE TABLE 2 SLEEVE DIAMETERS FOR AS1072 SLEEVES APPLY WHEN THE SLEE
15、VE IS COMPRESSED, OR CLAMPED, TO CONTACT THE HOSE. IN THIS CASE, A WRINKLE MAY OCCUR OVER APPROXIMATELY 10% OF THE SLEEVE CIRCUMFERENCE./9/ THE CUT ENDS OF THE FIRESLEEVE SHALL BE COATED WITH RTV SILICONE RUBBER, PRIOR TO INSTALLATION, TO PREVENT WICKING OF THE FLUIDS. THE FIRESLEEVE ENDS SHALL BE S
16、ECURED TO THE HOSE ASSEMBLY END FITTINGS WITH CORROSION RESISTANT STEEL BANDS. AFTER INSTALLATION, CRACKS OR VOIDS IN THE FIRESLEEVE THAT EXPOSE THE FIBERGLASS SHALL BE COATED WITH RTV SILICONE RUBBER./10/ INTEGRAL ABRASION SLEEVE SHALL FORM AN INTEGRAL, PERMANENT PART OF THE HOSE AND SHALL TERMINAT
17、E A MAXIMUM OF 3.0 MM FROM THE END OF THE COLLARS./11/ FEP AND POLYOLEFIN SHRINK ABRASION SLEEVES SHALL BE SHRUNK TO A SNUG FIT OVER THE HOSE AND END FITTING COLLARS./12/ ADD “AS1055 TYPE IIb CLASS B-S/P” TO IDENTIFICATION MARKING TO SHOW LEVEL OF CONFIDENCE, “FIRE PROOF” (15 MIN), WITH AS1055./13/
18、THE ENDS OF THE INTEGRAL FIRESLEEVE SHALL BE COVERED WITH A LENGTH OF SILICONE SLEEVE EXTENDING OVER THE END FITTING SOCKET.GENERAL NOTES:1. MATERIALS: HOSE AND FITTINGS - PER MA2007SLEEVES - SEE APPLICABLE STANDARD, TABLE 22. THIS HOSE ASSEMBLY SHALL BE QUALIFIED IN ACCORDANCE WITH PROCUREMENT SPEC
19、IFICATION MA2007. USERS OF THIS STANDARD ARE ADVISED TO CONTROL SOURCE APPROVAL(S) BY STANDARD PAGE SUPPLEMENT SHEET OR SIMILAR MEANS.3. CONSTRUCTION AND PERFORMANCE: MA2007 FITTINGS SHALL BE PERMANENTLY ATTACHED TO THE HOSE.4. OPERATING CHARACTERISTICS: SEE MA20075. DIMENSIONS IN MILLIMETERS. UNLES
20、S OTHERWISE SPECIFIED, TOLERANCES: LINEAR DIMENSIONS 0.25, ANGULAR DIMENSIONS 2.6. MARKING: MARKING SHALL BE PER MA2007 ON A STAINLESS STEEL BAND NOT OVER 25.4 MM WIDE, OR ON THE COLLAR. THE CHARACTERS SHALL BE A MINIMUM OF 1.6 MM HIGH. THE BAND SHALL BE SO DESIGNED AS TO REMAIN TIGHT ON THE HOSE TO
21、 PREVENT RELATIVE MOVEMENT AND RESULTANT CHAFING. IT SHALL BE OF SUFFICIENT STRENGTH TO PREVENT REMOVAL BY HAND. HOSE ASSEMBLY DATE AND “PT” SYMBOL SHALL BE ELECTROETCHED ON THE BAND OR ON AN END FITTING OR A FIRESLEEVE CLAMP.7. LOCKWIRE HOLE DESIGNATION IS AS FOLLOWS: U = TWO HOLES, 180 APARTW = TH
22、REE HOLES, 120 APARTLOCATION OF THE LOCKWIRE HOLE SHALL BE PER PROCUREMENT SPECIFICATION, MA2007.AEROSPACE STANDARD MA2172 SHEET 5 OF 5 HOSE ASSEMBLY, POLYTETRAFLUOROETHYLENE, PTFE CRES REINFORCED, 204 C, 21,000 KPA, LIGHTWEIGHT BEAM SEAL, STRAIGHT TO 90, METRIC NOTES (Continued):8. EXAMPLE OF PART NUMBER9. DO NOT USE UNASSIGNED SIZE CODES OR SLEEVE CODES.
