1、_ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising there
2、from, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions. Copyright 2015 SAE International All rights reserved. No part of this p
3、ublication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, 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: +1 724-776-497
4、0 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/MA1975 AEROSPACESTANDARDMA1975 Issued 1994-05 Reaffirmed 2015-07 Superseding MA21
5、40 Hose Assemblies, Polytetrafluoroethylene, Aramid Reinforced, 135 C, Standard Duty, 28 000/21 000 kPa, Hydraulic, Aircraft Systems RATIONALE MA1975 has been reaffirmed to comply with the SAE five-year review policy. 1. SCOPE:This document defines the requirements for a PTFE lined, aramid reinforce
6、d assembly suitable for useup to 135 C and up to 28 000 kPa aircraft and missile hydraulic and pneumatic systems.1.1 Product Classification:For service to 21 000 kPa, this hose assembly is suitable for use at reduced bend radius per Table 1.1.2 Field of Application:1.2.1 For use with phosphate ester
7、 or silicate ester hydraulic fluids, the oil immersion samples in 3.5.2.5 and 3.5.2.7 must be preconditioned per 4.5.2.3 using the specific system fluid. Due precaution must be taken in handling any toxic hydraulic fluid.1.2.2 This is not recommended for gaseous service where minor effusion is detri
8、mental.2. REFERENCES:The following documents of the issue in effect on date of invitation for bids or request for proposalsform a part of this document to the extent specified herein.SAE INTERNATIONAL MA1975 Page 2 of 30 TABLE 1 - Physical and Performance RequirementsSAE INTERNATIONAL MA1975 Page 3
9、of 30 2.1 SAE Publications:Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001.AMS 2486 Conversion Coating of Titanium Alloys - Fluoride - Phosphate TypeAMS 4928 Bars and Forgings - 6Al 4V, Annealed - 120 000 psiAMS 4945 Titanium Alloy Tubing, Seamless, Hydraulic, 3Al - 2.5V, Textu
10、re Controlled 105 000 psi (724 MPa) Yield StrengthAMS 4965 Bars, Forgings, and Rings, 6Al 4V, Solution and Precipitation Heat TreatedAMS 5536 Steel Bars, Corrosion Resistant, 18Cr - 8.5Ni (SAE 30302) Cold Drawn, 100 000 psi (690 MPa)AMS 5556 Steel Tubing, Seamless or Welded, Corrosion and Heat Resis
11、tant 18Cr - 11Ni - (Cb+Ta) (SAE 30347) HydraulicAMS 5557 Steel Tubing, Seamless or Welded, Corrosion and Heat Resistant 18Cr - 11Ni - Ti (SAE 30321) HydraulicAMS 5567 Steel Tubing, Seamless or Welded, Corrosion Resistant 19Cr - 10Ni (SAE 30304) Hydraulic, Solution TreatedAMS 5570 Steel Tubing, Seaml
12、ess, Corrosion and Heat Resistant 18Cr - 11Ni - 0.40Ti (SAE 30321)AMS 5571 Steel Tubing, Seamless, Corrosion and Heat Resistant 18Cr - Ni - 0.70(Cb+Ta) (SAE 30347)AMS 5575 Steel Tubing, Welded, Corrosion and Heat Resistant 18Cr - 10.5Ni - 0.70(Cb+Ta) (SAE 30347)AMS 5576 Tubing, Welded, 18Cr - 11Ni -
13、 0.40TiAMS 5637 Steel Bars, Corrosion Resistant, 18Cr - 10Ni (SAE 30304)AMS 5639 Steel Bars, Forgings, Tubing, and Rings, Corrosion Resistant 19Cr - 10Ni (SAE 30304)AMS 5643 Steel Bars, Forgings, Tubing and Rings, Corrosion Resistant 16.5Cr - 4.0Ni - 4.0CuAMS 5644 Steel Bars and Forgings, Corrosion
14、and Heat Resistant 17Cr - 7Ni - 1AlAMS 5645 Steel Bars, Forgings, Tubing and Rings, Corrosion and Heat Resistant, 18Cr - 10Ni - 0.40Ti (SAE 30321)AMS 5646 Steel Bars, Forgings, Tubing and Rings, Corrosion and Heat Resistant, 18Cr - 11Ni - 0.60(Cb+Ta) (SAE 30347)AMS 5647 Steel Bars, Forgings, Tubing
15、and Rings, 18Cr - 8NiAMS 5659 Steel Bars, Forgings, and Rings, Corrosion Resistant 15Cr - 4.5Ni - 0.30(Cb+Ta) - 3.5Cu, Consumable Electrode MeltedAMS 5743 Steel Bars and Forgings, Corrosion and Moderate Heat Resistant 15.5Cr - 4.5Ni - 2.9Mo - 0.10N, Solution Heat Treated, Sub-Zero Cooled, Equalized
16、and Over-TemperedARP603 Impulse Testing of Hydraulic Hose Assemblies, Tubing and FittingsAS611 Polytetrafluoroethylene Hose Assembly Cleaning MethodsARP908 Hose Fitting - Installation and Qualification Test Torque RequirementsAS1055 Fire Testing of Flexible Hose, Tube Assemblies, Coils, Fittings and
17、 Similar System ComponentsAS1072 Sleeve Hose Assembly, Fire ProtectionSAE INTERNATIONAL MA1975 Page 4 of 30 2.1 (Continued):AIR1228 Standard Impulse Machine Equipment and OperationAS1241 Fire Resistant Phosphate Ester Hydraulic Fluid for AircraftARP1835 Preparation for Delivery, General Requirements
18、 for Hose AssembliesAS4488 Tubular Assemblies, Fusion Welded, Inspection Processes and Acceptance Standards forMA1370MA2002 Impulse Testing of Hydraulic Hose, Tubing and Fitting AssembliesMA2014 Fitting End, Flareless Acorn, MetricMA2040 Nut, Sleeve Coupling FlarelessMA2047 Nut Swivel, Wired OnMA207
19、8 Test Methods, Hose AssembliesMA2095 Fitting Design Standard, 24 Cone Dimensions ForMA2096 Fitting End, 24 Cone, Bulkhead, Standard Dimensions ForMA2187 Hose Assembly, PTFE, Aramid Reinforced, Standard Duty, 28 000/21 000 kPa, 135 C, Titanium Fittings, Flareless, Straight to StraightMA2188 Hose Ass
20、embly, PTFE, Aramid Reinforced, Standard Duty, 28 000/21 000 kPa, 135 C, Titanium Fittings, Flareless, Straight to 45MA2189 Hose Assembly, PTFE, Aramid Reinforced, Standard Duty, 28 000/21 000 kPa, 135 C, Titanium Fittings, Flareless, Straight to 90MA2190 Hose Assembly, PTFE, Aramid Reinforced, Stan
21、dard Duty, 28 000/21 000 kPa, 135 C, Titanium Fittings, Flareless, 45 to 90MA2191 Hose Assembly, PTFE, Aramid Reinforced, Standard Duty, 28 000/21 000 kPa, 135 C, Titanium Fittings, Flareless, 45 to 45MA2192 Hose Assembly, PTFE, Aramid Reinforced, Standard Duty, 28 000/21 000 kPa, 135 C, Titanium Fi
22、ttings, Flareless, 90 to 90MA2273 Beam Seal, Male, Design Standard, MetricMA2274 Beam Seal, Male, Bulkhead Design, Standard, MetricMA4568 Hose Assembly, PTFE, Aramid Reinforced, Standard Duty, 4000/3000 psi, 275 F, Titanium Fittings, Flareless, Straight to StraightMA4569 Hose Assembly, PTFE, Aramid
23、Reinforced, Standard Duty, 4000/3000 psi, 275 F, Titanium Fittings, Flareless, Straight to 45MA4570 Hose Assembly, PTFE, Aramid Reinforced, Standard Duty, 4000/3000 psi, 275 F, Titanium Fittings, Flareless, Straight to 90MA4571 Hose Assembly, PTFE, Aramid Reinforced, Standard Duty, 4000/3000 psi, 27
24、5 F, Titanium Fittings, Flareless, 45 to 90MA4572 Hose Assembly, PTFE, Aramid Reinforced, Standard Duty, 4000/3000 psi, 275 F, Titanium Fittings, Flareless, 45 to 45MA4573 Hose Assembly, PTFE, Aramid Reinforced, Standard Duty, 4000/3000 psi, 275 F, Titanium Fittings, Flareless, 90 to 90SAE INTERNATI
25、ONAL MA1975 Page 5 of 30 2.2 ASTM Publications:Available from ASTM, 1916 Race Street, Philadelphia, PA 19103-1187.ASTM A 262 Detecting Susceptibility to Intergranular Attack in Austenitic Stainless SteelsASTM B 348 Titanium AlloyASTM D 638 Precipitation Hardening Iron Base Superalloy Bars, Forgings,
26、 and Forging Stock for High Temperature Service, Standard Specification forASTM D 1457 TFE - Fluorocarbon Resin Molding and Extrusion Materials2.3 U.S. Government Publications:Available from Standardization Documents Order Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.P-D-680 Dr
27、y Cleaning SolventQQ-P-35 Passivation Treatments for Corrosion Resistant SteelsQQ-S-763 Steel Bars, Wire Shapes, and Forgings, Corrosion-ResistingTT-I-735 Isopropyl AlcoholMIL-H-5606 Hydraulic Fluid, Petroleum Base, Aircraft Missile, and OrdnanceMIL-T-8504 Tubing, Steel, Corrosion-Resisting (304) Ae
28、rospace Vehicle Hydraulic Systems, Annealed, Seamless and WeldedMIL-T-8606 Tubing, Steel, Corrosion-Resistant (18-8 Stabilized and Extra Low Carbon)MIL-T-8808 Tubing, Steel, Corrosion-Resistant (18-8 Stabilized), Aircraft Hydraulic QualityMIL-F-8815 Filter and Filter Elements, Fluid Pressure, Hydrau
29、lic Lines, 15 Micron Absolute and 5 Micron Absolute, Type II SystemsMIL-H-83282 Hydraulic Fluid, Fire-Resistant, Synthetic, Hydrocarbon Base, AircraftMIL-F-85421 Dynamic Beam FittingMIL-L-46010 Dry Film LubricantMIL-STD-100 Engineering Drawing Practices for InspectionMIL-STD-105 Sampling Procedures
30、and Tables by AttributesMIL-STD-129 Marking for Shipment and StorageMIL-STD-130 Identification Marking of U.S. Military PropertyMIL-STD-831 Test Reports, Preparation ofMIL-STD-1595 Qualification of Aircraft, Missile and Aerospace Fusion WeldersMIL-STD-1839 Calibration and Measurement RequirementsMIL
31、-STD-2219 Fusion Welding for Aerospace ApplicationsMS19059 Balls, Bearing, Ferrous, Chrome Alloy Steel2.4 NAS Publications:Available from AIA, 1250 Eye Street N.W., Washington, DC 20005.ANSI/ASME B46.1 Surface TextureSAE INTERNATIONAL MA1975 Page 6 of 30 3. TECHNICAL REQUIREMENTS:3.1 Qualification:T
32、he hose assemblies furnished under this document shall be products which are qualified by meeting all the requirements covered by this document.3.2 Materials:The hose assembly materials shall be uniform in quality, free from defects, consistent with good manufacturing practice and shall conform to a
33、pplicable specifications and the requirements specified herein and shall be of the highest quality and suitable for the purpose intended.3.2.1 Metals: Metals used in the hose and fittings shall be corrosion-resistant and shall conform to the following specifications:a. Bars and Forgings:QQ-S-763 - C
34、lass 302 - Cond. A and Cond. B (AMS 5636 and AMS 5637)QQ-S-763 - Class 304 - Cond. A and Cond. B (AMS 5639)QQ-S-763 - Class 304L - Cond. A (AMS 5647)QQ-S-763 - Class 321 - Cond. A (AMS 5645)QQ-S-763 - Class 347 - Cond. A (AMS 5646)AMS 5643 - 17-4PHAMS 5644 - 17-7PHAMS 5659 - 15-5PHAMS 5743 - AM-355A
35、MS 4928 - TI 6AL 4V Annealed Bars and ForgingsAMS 4965 - TI 6AL 4V Heat Treated Bars, Forgings and RingsASTM B 348 - Grade 2 - Titanium Alloyb. Tubing:MIL-T-8504 - Comp. 304 (AMS 5567)MIL-T-8606 - Type I, Comp. 321 (AMS 5570)MIL-T-8808 - Type I or Type II, Comp. 321 (AMS 5557, AMS 5570, or AMS 5576)
36、MIL-T-8808 - Type I or Type II, Comp. 347 (AMS 5571, AMS 5575, or AMS 5556)AMS 4942 - Titanium Tubing, Seamless, Annealed, 40 000 psi (275 MPa) Yield StrengthAMS 4943 - Titanium Alloy Tubing, Seamless, Hydraulic 3.0 Al - 2.5V AnnealedAMS 4945 - Titanium Alloy Tubing, Seamless, Hydraulic, 3Al 2.5V, T
37、exture Controlled, 105 000 psi (724 MPa) Yield StrengthSAE INTERNATIONAL MA1975 Page 7 of 30 3.2.2 Reinforcement: Para-aramid textile treated and applied to the hose with an outer polyester braid or polybenzimidazol/para-aramid blend braid cover to meet all of the requirements herein.3.2.3 Finish:3.
38、2.3.1 Cres Stainless steel, passivate per QQ-P-35.3.2.3.2 If titanium fluoride phosphate conversion coat is used, it shall be per AMS 2486.3.3 Design and Fabrication:The hose assembly shall consist of a seamless polytetrafluoroethylene inner tube, treated para-aramid reinforcement, polyester or poly
39、benzimidazol/para-aramid blend outer braid cover with optional PTFE tape interlayer and corrosion-resistant steel and/or titanium end fittings, as required, to meet the construction and performance requirements of this document.3.3.1 Inner Tube: The inner tube shall be of a seamless construction of
40、virgin polytetrafluoroethylene resin of uniform gauge. It shall have a smooth bore and shall be free from pitting, deep scratches, or projections on the inner surface. Additives may be included in the compound from which the tube is extruded.3.3.2 Reinforcement: The reinforcement shall consist of a
41、treated para-aramid braid and/or wraps with optional PTFE tape interlayer and braided polyester or polybenzimidazol/para-aramid blend outer cover conforming to the applicable specifications listed in 3.2.2. The reinforcement shall be arranged over the inner tube to provide sufficient strength and pr
42、otection for ensuring conformance with the requirements specified herein. Broken reinforcing cords shall be cause for rejection. The outer braid shall provide 100% coverage to protect the para-aramid reinforcement from exposure to ultraviolet light. A continuous lay line interrupted with AS1975, MA1
43、975 or AS/MA1975 and hose manufacturers name or trademark shall be permanently marked in contrasting color along hose length.3.3.3 Fittings: All fittings shall be permanently attached by crimp or swage and proven to meet the requirements herein. Standard hose assemblies shall have flared fittings, f
44、lareless fittings according to MA2014 to mate with MA2095 or MA2096 or dynamic beam fittings to mate with male end per MA2273 or MA2274 in accordance with applicable documents (see Section 2). Antitorque hexes/flats shall be provided and shall fit standard wrench openings. Titanium nut threads and b
45、earing shoulders will be lubricated with dry film per MIL-L-46010 Type I. External coating is permitted.3.3.3.1 Straight Fittings: Straight fittings shall be of one piece construction. Welded or brazed joints must not be located in the fluid paths, except welded and redrawn tubing, in accordance wit
46、h MIL-T-8504, or MIL-T-8808 may be used. Elbow fittings may be classified per 3.3.3.2 for construction.SAE INTERNATIONAL MA1975 Page 8 of 30 3.3.3.2 Other Fittings: Other fittings are preferred to be of one piece construction. If stainless steel tubes are used, they shall be welded and drawn per MIL
47、-T-8504 or MIL-T-8808. If titanium tubes are used, they shall be seamless per AMS 4945. Fitting welds will be butt welds per MIL-STD-2219 or AS4488. If welding is used, a stabilized grade of stainless steel shall be used.3.3.3.3 End Fitting Collars (Sockets): All end fitting collars (sockets), crimp
48、ed or swaged, and fabricated from Type 304 stainless steel shall be capable of passing an embrittlement test as specified in ASTM A 262 Practice E, prior to assembly to the nipple and crimp or swaging operation. Sockets fabricated from stabilized austenitic steel (304 L, 321 or 347) or titanium are
49、acceptable without being subjected to the embrittlement test. Titanium collars are per ASTM B 348 - Grade 2.3.4 Dimensions:The hose assembly dimensions, except for length, shall be as specified in Figure 1 and Table 2.FIGURE 1 - Hose and Fitting DimensionsSAE INTERNATIONAL MA1975 Page 9 of 30 TABLE 2 - Hose and Fitting Dimensions in mmTABLE 3 - Hose ID Ball Size3.4.1 Hose Weight: Hose consisting of inner tube,
