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/MA4098 AEROSPACE STANDARD MA4098 Issued 1995-10 Reaffirmed 2015-08 Hose Assembly,
5、 Polytetrafluoroethylene, Heavy Duty, Metallic Reinforced, 204 C, 35 000 kPa Hydraulic and Pneumatic, Metric RATIONALE MA4098 has been reaffirmed to comply with the SAE five-year review policy. 1. SCOPE:This Aerospace Standard (MA) defines the requirements for a heavy duty polytetrafluoroethylene (P
6、TFE) lined, metallic reinforced, hose assembly suitable for use in 204 C, 35 000 kPa, aircraft and missile hydraulic fluid systems.2. REFERENCES:2.1 Applicable Documents:The following publications form a part of this specification to the extent specified herein. The latest issue of SAE publications
7、shall apply. The applicable issue of other documents shall be as specified in AMS 2350.2.1.1 SAE Publications: Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001.AMS 4928 Ti Alloy Bars, Forgings and Rings, 6Al - 4V, Anneal 120,000 psiAMS 4945 Titanium Alloy Tubing, Seamless, Hydra
8、ulic 3Al - 2.5V, Texture Controlled, 105,000 psi Yield StrengthAMS 4965 Ti Alloy Bars, Forgings and Rings, 6Al - 4V, Solution and Precipitation Heat TreatedAMS 5556 Steel Tubing, Seamless or Welded, Corrosion and Heat-Resistant 18Cr - 11Ni - (Cb + Ta) (SAE 30347) HydraulicAMS 5557 Steel Tubing, Seam
9、less and Welded, Corrosion and Heat-Resistant 18Cr - 11Ni-Ti (SAE 30321) HydraulicAMS 5561 Steel Tubing Welded and Drawn, 9.0Mn - 20Cr - 6.5Ni - 0.28N, High Pressure HydraulicAMS 5567 Steel Tubing, Seamless and Welded, Corrosion-Resistant 19Cr - 10Ni (SAE 30304) Hydraulic, Solution TreatedSAE INTERN
10、ATIONAL MA4098 Page 2 of 20 2.1.1 (Continued):AMS 5570 Steel Tubing, Seamless, 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
11、18Cr - 10.5Ni - 0.70 (Cb + Ta) (SAE 30347)AMS 5576 Tubing Welded, 18Cr - 10.5Ni - 0.40Ti Solution Heat TreatedAMS 5636 Steel Bars, Corrosion-Resistant, 18Cr - 9.0Ni (SAE 30302)AMS 5637 Steel Bars, Corrosion-Resistant, 18Cr - 9.0Ni (SAE 30302)AMS 5639 Steel Bars, Forgings, Tubing, and Rings, Corrosio
12、n-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 and Heat-Resistant 17Cr - 7Ni - 1AlAMS 5645 Steel Bars, Forgings, Tubing and Rings, Corrosion and Heat-Resistant, 18Cr - 10Ni - 0.
13、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 and Rings, 18Cr - 8NiAMS 5659 Steel Bars, Forgings and Rings, Corrosion-Resistant 15Cr - 4.5Ni - 0.30 (Cb + Ta) - 3.5 Consumabl
14、e 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 and Over-TemperedAS611 Tetrafluoroethylene Hose Assembly Cleaning MethodsARP908 Hose Fitting - Installation and Qualification Te
15、st Torque RequirementsAS1055 Fire Resistance and Fire TestARP1835 Preparation for Delivery, General Requirements for Hose AssembliesAS4488 Tubular Assemblies, Fusion Welded, Inspection Process and Acceptance StandardMA1370 (ISO 5855) Screw Threads - MJ Profile, MetricMA2014 (ISO 7321) Fitting Ends -
16、 Flareless Acorn, MetricMA2078 (ISO 8829) Test Methods, Hose AssembliesMA2095 Fitting Design Standard, 24 Cone, Standard DimensionsMA2096 Fitting End, 24 Cone, Bulkhead, Standard DimensionsMA2273 Beam Seal, Male, Design Standard, MetricMA2274 Beam Seal, Male, Bulkhead Design Standard, MetricSAE INTE
17、RNATIONAL MA4098 Page 3 of 20 2.1.2 ASTM Publications: Available from American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103-1187.ASTM A 262 Detecting Susceptibility to Intergranular Attack on Stainless SteelASTM A 580 Stainless and Heat-Resistant Steel Wire - Type 304
18、or 316, Condition B2.1.3 U.S. Government Publications: Available from DODSSP, Subscription Services Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.P-D-680 Dry Cleaning SolventQQ-S-763 Steel Bars, Wire Shapes and Forgings, Corrosion-ResistingMIL-C-5501 Caps and Plugs, Protective,
19、Dust and Moisture SealMIL-F-85720 Fittings, Tube, Fluid Systems, Separable, High Pressure Beam SealMIL-H-5606 Hydraulic Fluid, Petroleum Base, Aircraft, Missile and OrdnanceMIL-H-83282 Hydraulic Fluid, Fire-Resistant, Synthetic Hydrocarbon Base AircraftMIL-L-7808 Lubricating Oil, Aircraft Turbine En
20、gine, Synthetic BaseMIL-T-8504 Tubing, Steel, Corrosion-Resisting (304) Aerospace Vehicle Hydraulic Systems, Annealed, Seamless and WeldedMIL-T-8808 Tubing, Steel, Corrosion-Resistant (18-8 Stabilized) Aircraft Hydraulic QualityMIL-STD-100 Engineering Drawing Practices for InspectionMIL-STD-130 Iden
21、tification Marking of U.S. Military PropertyMIL-STD-831 Test Reports, Preparation ofMIL-STD-2219 Fusion Welding for Aerospace ApplicationH4/H8 Cataloging Handbook3. TECHNICAL REQUIREMENTS:3.1 Qualification:The hose assemblies furnished under this document shall be products which are qualified by mee
22、ting 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, shall conform to applicable specifications and the requirements specified herein, and shall be of the highest qual
23、ity and suitable for the purpose intended.SAE INTERNATIONAL MA4098 Page 4 of 20 3.2.1 Metals: Metals used in the hose and fittings shall be corrosion-resistant and shall conform to the following specification:a. Bars and Forgings:(1) QQ-S-763 Class 302 - Cond. A and Cond. B (AMS 5636 and AMS 5637)(2
24、) QQ-S-763 Class 304 - Cond. A and Cond. B (AMS 5639)(3) QQ-S-763 Class 304L - Cond. A (AMS 5647)(4) QQ-S-763 Class 321 - Cond. A (AMS 5645)(5) QQ-S-763 Class 347 - Cond. A (AMS 5646)(6) AMS 5643 17-4PH(7) AMS 5644 17-7PH(8) AMS 5659 15-5PH(9) AMS 5743 AM-355(10) AMS 4928 Titanium 6Al 4V Annealed(11
25、) AMS 4965 Titanium 6Al 4V Heat Treatedb. Tubing:(1) MIL-T-8504 Comp. 304 (AMS 5567)(2) MIL-T-8808 Type I or Type II, Comp. 321 (AMS 5557, AMS 5570, or AMS 5576)(3) MIL-T-8808 Type I or Type II, Comp. 347 (AMS 5571, AMS 5575, or AMS 5556)(4) AMS 4945 Titanium 3Al 2.5V Texture Controlled(5) AMS 5561
26、Welded and Redrawn Stainless Steel Tubing, 21-6-9c. Wire:(1) ASTM A 580 Specification for Stainless and Heat-Resisting Steel Wire, Type 304 or 316 Condition B3.3 Construction:The hose assembly shall consist of a seamless PTFE inner tube, corrosion-resistant steel-wire reinforcement, and corrosion-re
27、sistant metal end fittings as required to meet the construction and performance requirements of this document and as required for its intended use.3.3.1 Inner Tube: The inner tube shall be of a seamless construction of virgin PTFE resin of uniform gauge. It shall have a smooth bore and shall be free
28、 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 corrosion-resistant steel wires conforming to the applicable specifications listed in 3.2.1. The wires
29、 shall be so arranged over the inner tube as to provide sufficient strength to ensure conformance with the requirements specified herein. Broken reinforcing wires shall be cause for rejection. Crossed-over reinforcing wires shall not be cause for rejection of the hose assembly.SAE INTERNATIONAL MA40
30、98 Page 5 of 20 3.3.3 Interlayers: Interlayers, if used, shall be of a suitable material and shall be resistant to pressure pounding and to all fluids with which the hose may come in contact during normal service. They shall be capable to withstanding temperatures of -54 to 204 C and shall not extru
31、de through the outer braid during testing or in service.3.3.4 Fittings: All fittings shall be proven to meet the requirements herein. Standard hose assemblies shall have a reconnectable configuration of beam seal fittings to mate with MA2273 or MA2274, flareless per MA2014 to mate with MA2095 or MA2
32、096, or other suitable end connections. Fitting hex portions shall fit standard wrench openings.3.3.4.1 Straight Fittings: Straight fittings shall be of one piece construction. Weld or braze joints must not be located in the fluid paths.3.3.4.2 Other Fittings: Other fittings including elbow fittings
33、 shall be of one piece construction to the maximum extent possible. However, those made with other than one piece construction can use stainless steel welded and redrawn tubing per AMS 5561 or titanium seamless tubing per AMS 4945. When weld joints are required the butt weld will be per MIL-STD-2219
34、 or AS4488. If welding is used, a stabilized grade of stainless steel shall be used.3.3.4.3 End Fitting Collars (Sockets): All end fitting collars (sockets) crimped or swaged, fabricated from Type 304 stainless steel are required to be capable of passing an embrittlement test as specified in ASTM A
35、262 Practice E, prior to assembly to the nipple or swaging operation. Sockets fabricated from stabilized austenitic steel (304L, 321, or 347) are acceptable without being subjected to the embrittlement test. Titanium sockets are not recommended.3.3.5 Dimensions: The hose assembly dimensions, except
36、for length, shall be as specified in Figure 4 and Table 5.3.3.6 Hose Weight: Hose consisting of inner tube, reinforcement, and interlayers as outlined in 3.3.1 through 3.3.3 shall not exceed the maximum hose weights covered in Table 1A.3.4 Performance:The hose assembly shall meet the following perfo
37、rmance requirements:3.4.1 Tube:3.4.1.1 Tube Roll and Proof Pressure Test: The tube shall not leak, split, burst, or show any evidence of malfunction when rolled to the flattening and rounding gaps of MA2078 (21 000 kPa and higher) values. The test method is specified in 4.6.2.1.3.4.1.2 Tube Proof Pr
38、essure: The tube, without reinforcing wires, shall not leak, burst, or show any evidence of malfunction when tested to the MA2078 (21 000 kPa and higher) proof pressure values for 1 min. The test method is specified in 4.6.2.1.SAE INTERNATIONAL MA4098 Page 6 of 20 TABLE 1 - Hose Weights and Pressure
39、sTABLE 1A - Physical RequirementsTABLE 1B - Pressure Requirements (kPa)3.4.1.3 Tensile Strength: The longitudinal tensile strength for all sizes of tubes shall be 15 200 kPa minimum. The transverse tensile strength for sizes DN16 and larger shall be 12 500 kPa minimum. For sizes DN12 and smaller the
40、 transverse tensile strength need not be tested. The test method is specified in 4.6.2.2.3.4.1.4 Elongation: Elongation shall be a minimum of 200%. The test method is specified in 4.6.2.3.3.4.1.5 Specific Gravity: The specific gravity values of the hose inner tube shall not exceed 2.155 apparent and
41、 2.190 relative. The test method is specified in 4.6.2.4.3.4.2 Hose Assembly: The hose, complete with reinforcing wires and assembled with end fittings, shall meet the following performance requirements:3.4.2.1 Proof Pressure: The hose assembly shall withstand the proof pressure listed in Table 1B w
42、ithout malfunction or leakage. The test method is specified in 4.6.3.3.4.2.2 Elongation and Contraction: The hose assembly shall not change in length by more than 2% in 250 mm of hose length when subjected to the operating pressure in Table 1B for a minimum of 5 min. The test method is specified in
43、4.6.4.3.4.2.3 Volumetric Expansion: The volumetric expansion of the hose assemblies shall not exceed the limits specified in Table 1A. The test method is specified in 4.6.5.SAE INTERNATIONAL MA4098 Page 7 of 20 3.4.2.4 Leakage: The hose assembly shall not leak (no external wetting) when subjected to
44、 two pressure cycles of 70% of minimum room temperature burst pressure. The test method is specified in 4.6.6.3.4.2.5 Room Temperature Burst Pressure: The hose assembly shall not leak nor burst at any pressure below the burst value specified in Table 1B. The test method is specified in 4.6.7.3.4.2.6
45、 Thermal Shock: The hose assemblies shall not leak nor show any evidence of malfunction when subjected to the Table 1B proof and high temperature burst pressure after being thermally shock tested per MA2078. The test method is specified in 4.6.8.3.4.2.7 Impulse: The hose assemblies shall show no evi
46、dence of leakage from hose or fitting prior to completion of 100 000 pressure impulse cycles. The test method is specified in 4.6.9.3.4.2.8 Assembly Flexibility: The hose assembly shall not leak nor show any evidence of malfunction when subjected to the Table 1B proof pressure after 400 000 flexure
47、cycles. The test method is specified in 4.6.10.3.4.2.9 Stress Degradation (Air Leakage): The air leakage rate from the hose and two end fittings (not including “B“ nuts) when held at the Table 1B operating pressure after completion of the stress degradation test shall not exceed 80 mL/m/min. The tes
48、t method is specified in 4.6.11.3.4.2.10 High Temperature Burst Test: The hose assembly shall not leak nor burst at any pressure below the high temperature burst value specified in Table 1B. The test method is specified in 4.6.8.3.4.2.11 Effusion: The effusion rate for any hose size shall not exceed
49、 26 mL/m of hose length. The test method is specified in 4.6.12.3.4.2.12 Repeated Assembly Torque: The beam seal fitting shall withstand the repetitive torque values specified in MIL-F-85720, and flareless fitting per ARP908, without failure or leakage. There shall be no leakage, galling, or other malfunction of the fitting nut and interface connection during the specified pressure test. The test method is specified in 4.6.13.3.4.2.13 El
