SAE MA 4623-1994 Hose Assembly Polytetrafluoroethylene Para Aramid Reinforced Heavy-Duty 21 000 kPa 135 Degrees C Aircraft Hydraulic Systems Metric (8 2015 Reaffirmed PDF is not Av.pdf

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2、m, is the sole responsibility of the user.”SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions.Copyright 2004 SAE InternationalAll rights reserved. No part of this publication may be

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4、-776-0790Email: custsvcsae.orgSAE WEB ADDRESS: http:/www.sae.orgAEROSPACE STANDARDMA4623Issued 1994-05Reaffirmed 2004-06Hose Assembly, Polytetrafluoroethylene, Para Aramid ReinforcedHeavy-Duty, 21 000 kPa, 135 C, Aircraft Hydraulic Systems, Metric1. SCOPE:This document defines the requirements for h

5、eavy-duty hose assemblies suitable for use in 21 000 kPa, 135 C aircraft systems where rapid rate pressure pulsing and torsional/longitudinal flexing may occur in addition to normal hydraulic system loading.2. APPLICABLE DOCUMENTS:2.1 Applicable Documents:The following publications form a part of th

6、is specification to the extent specified herein. The applicable issue of documents shall be the issue in effect on the date of the purchase order.2.1.1 SAE Publications: Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001.AMS 2486 Conversion Coating of Titanium Alloys - Fluoride -

7、Phosphate TypeAMS 4928 Bars and Forgings - 6Al - 4V, Annealed - 120,000 psiAMS 4945 Tubing, Seamless, Hydraulic, 3Al 2.5V, Texture Controlled, 105,000 psi (724 MPa) Yield StrengthAMS 4965 Bars, Forgings and Rings - 6Al 4V, Solution and Precipitation Heat TreatedAMS 5556 Steel Tubing, Seamless or Wel

8、ded, Corrosion and Heat-Resistant, 18Cr - 11Ni - (Cb+Ta) (SAE 30347) HydraulicAMS 5557 Steel Tubing, Seamless or Welded, Corrosion and Heat-Resistant, 18Cr - 11Ni (SAE 30321) HydraulicAMS 5567 Steel Tubing, Seamless and Welded, Corrosion Resistant 19Cr - 10Ni (SAE 30304) Hydraulic, Solution TreatedA

9、MS 5570 Steel Tubing, Seamless, Corrosion and Heat-Resistant, 18Cr - 11Ni - 0.40Ti (SAE 30321)AMS 5571 Steel Tubing, Seamless, Corrosion and Heat-Resistant, 18Cr - 10.5Ni - 0.70(Cb+Ta) Solution Heat TreatedSAE MA4623 - 2 -2.1.1 (Continued):AMS 5575 Steel Tubing, Welded, Corrosion and Heat-Resistant,

10、 18Cr - 10.5Ni - 0.70(Cb+Ta) (SAE 30347)AMS 5576 Tubing, Welded, 18Cr - 11Ni - 0.40TiAMS 5636 Steel Bars, Corrosion-Resistant, 18Cr - 8.5Ni (SAE 30302) Cold Drawn, 100,000 psi (690 MPa)AMS 5637 Steel Bars, Corrosion-Resistant, 18Cr - 10Ni (SAE 30302)AMS 5639 Steel Bars, Forgings, Tubing and Rings, C

11、orrosion-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 -

12、 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 and Rings, 18Cr - 8NiAMS 5659 Steel Bars, Forgings, and Rings, Corrosion-Resistant 15Cr - 4.5Ni - 0.30(Cb+Ta) - 3.5Cu Co

13、nsumable Electrode MeltedARP603 Impulse Testing of Hydraulic Hose Assemblies, Tubing and FittingsAS611 Polytetrafluoroethylene Hose Assembly Cleaning MethodsARP908 Torque Requirements, Installation and Qualification Test, Hose, and Tube FittingAS1055 Fire Testing of Flexible Hose Tube Assemblies, Co

14、ils, Fittings and Similar SystemsAS1072 Sleeve, Hose Assembly, Fire ProtectionAS1073 Sleeve, Hose Assembly, Heat ShrinkableAIR1228 Standard Impulse Machine Equipment and OperationAS1241 Fire Resistant Phosphate Ester Hydraulic Fluid for AircraftMA1370 Screw Threads - MJ Profile, MetricARP1835 Prepar

15、ation for Delivery, General Requirements for Hose AssembliesMA2002 Impulse Testing of Hydraulic Hose, Tubing, and Fitting AssembliesMA2014 Fitting End, Flareless Acorn, MetricMA2078 Test Methods, Hose AssembliesMA2095 Fitting Design Standard, 24 Cone, Dimensions forMA2096 Fitting End, 24 Cone, Bulkh

16、ead, Standard Dimensions forMA2273 Beam Seal, Male, Design Standard, MetricMA2274 Beam Seal, Male, Bulkhead Design, Standard, MetricAS4265 Impulse Testing of Hydraulic Tubing and Fittings, S-N CurveAS4488 Tubular Assemblies, Fusion Welded, Inspection Processes and Acceptance Standards forMA4624 Hose

17、 Assembly, Polytetrafluoroethylene, Para Aramid Reinforced, Heavy Duty, 21 000 kPa, 135 C, Flareless, Titanium Fittings, St-StMA4625 Hose Assembly, Polytetrafluoroethylene, Para Aramid Reinforced, Heavy Duty, 21 000 kPa, 135 C, Flareless, Titanium Fittings, St-45SAE MA4623 - 3 -2.1.1 (Continued):MA4

18、626 Hose Assembly, Polytetrafluoroethylene, Para Aramid Reinforced, Heavy Duty, 21 000 kPa, 135 C, Flareless, Titanium Fittings, St-90MA4627 Hose Assembly, Polytetrafluoroethylene, Para Aramid Reinforced, Heavy Duty, 21 000 kPa, 135 C, Flareless, Titanium Fittings, 45-45MA4628 Hose Assembly, Polytet

19、rafluoroethylene, Para Aramid Reinforced, Heavy Duty, 21 000 kPa, 135 C, Flareless, Titanium Fittings, 90-90MA4629 Hose Assembly, Polytetrafluoroethylene, Para Aramid Reinforced, Heavy Duty, 21 000 kPa, 135 C, Flareless, Titanium Fittings, 45-902.1.2 U.S. Government Publications: Available from Stan

20、dardization Documents Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.QQ-P-35 Passivation Treatment for Corrosion Resistant SteelQQ-S-763 Steel Bars, Wire Shapes, and Forgings, Corrosion-ResistingMIL-H-5606 Hydraulic Fluid, Petroleum Base, Aircraft Missile, and OrdnanceMIL-T

21、-8504 Tubing, Steel, Corrosion-Resisting (304) Aerospace Vehicle Hydraulic Systems, Annealed, Seamless, and WeldedMIL-T-8505 Tubing, Steel, Corrosion-Resistant (18-8 Stabilized and Extra Low Carbon)MIL-T-8808 Tubing, Steel, Corrosion-Resistant (18-8 Stabilized), Aircraft Hydraulic QualityMIL-T-46010

22、 Lubricant, Solid Film, Heat Cured, Corrosion InhibitingMIL-H-83282 Hydraulic Fluid, Fire-Resistant, Synthetic, Hydrocarbon Base, AircraftMIL-F-85421 Fittings, Tube, Fluid Systems, Separable, Dynamic Beam Seal, Requirements forMIL-STD-100 Engineering Drawing Practices for InspectionMIL-STD-105 Sampl

23、ing Procedures and Tables by AttributesMIL-STD-130 Identification Marking of U.S. Military PropertyMIL-STD-831 Test Reports, Preparation ofMS19059 Balls, Bearing, Ferrous, Chrome Alloy Steel2.1.3 ASTM Publications: Available from American Society for Testing and Materials, 1916 Race Street, Philadel

24、phia, PA 19103.ASTM A 262 Detecting Susceptibility to Intergranular Attack on Stainless SteelASTM B 348 Specification for Titanium and Titanium Alloy Bars and Billets, Grade 2SAE MA4623 - 4 -3. TECHNICAL REQUIREMENTS:3.1 Qualification:The hose assemblies furnished under this document shall be produc

25、ts which are qualified by meeting all the requirements covered by this document (such as MA4624 through MA4629).3.2 Materials:The hose assembly materials shall be uniform in quality, free from defects, consistent with good manufacturing practice and shall conform to applicable specifications, and th

26、e requirements specified herein 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:3.2.1.1 Bars and Forgings:QQ-S-763 Class 302 - Cond. A or Cond. B (A

27、MS 5636 and AMS 5637)QQ-S-763 Class 304 - Cond. A or 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-355AMS 4928 TI 6Al 4V AnnealedAMS 4965 TI 6Al 4V Heat

28、TreatedASTM B 348 Grade 2 - Titanium Alloy3.2.1.2 Tubing:MIL-T-8504 Comp. 304 (AMS 5567)MIL-T-8505 Type I, Comp. 321 (AMS 5570)MIL-T-8808 Type I or Type II, Comp. 321 (AMS 5557, AMS 5570, or AMS 5576)Type I or Type II, Comp. 347 (AMS 5571, AMS 5575, or AMS 5556)AMS 4945 Ti 3Al 2.5V Cold Worked and S

29、tress Relieved3.2.2 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.SAE MA4623 - 5 -3.2.3 Finish:3.2.3.1 Corrosion resistant steel (CRES), passivate per QQ-P-35.3

30、.2.3.2 Titanium fluoride phosphate conversion coating shall be per AMS 2486 when applicable.3.3 Design and Fabrication:The hose assembly shall consist of a seamless polytetrafluoroethylene inner tube, treated para aramid reinforcement, polyester braid or polybenzimidazol/para aramid blend braid cove

31、r 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 virgin polytetrafluoroethylene resin of uniform gauge. It shall have a smooth bore

32、 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 treated para aramid braid and/or wraps with braided polyester or polybenzimidazol/

33、para aramid blend braid cover. The reinforcement shall be arranged over the inner tube to provide sufficient strength and protection for ensuring conformance with the requirements specified herein. Broken reinforcing cords shall be cause for rejection. The outer cover braid shall provide 100% covera

34、ge to protect the para aramid reinforcement from exposure to ultraviolet light. A continuous lay line interrupted with MA4623 (or AS4623) and hose manufacturers name or trademark shall be permanently marked in contrasting color along length of hose.3.3.3 Fittings: All fittings shall be permanently a

35、ttached by crimp or swage and proven to meet the requirements herein. Standard hose assemblies shall have flared fittings; flareless fittings in accordance with MA2014 to mate with MA2095 or MA2096; beam fittings to mate with male end fitting MA2273 and MA2274, in accordance with applicable document

36、s. Antitorque hexes shall be provided and shall fit standard metric wrench openings. All internal surfaces of fitting nuts shall be dry filmed with dry film per MIL-L-46010 Type I. Dry film on external surfaces is optional.3.3.3.1 Insert Fittings: Insert fittings shall be of one-piece construction.

37、Welded joints must not be located in the fluid paths, except welded and redrawn tubing, in accordance with MIL-T-8504 or MIL-T-8808 may be used. Elbow fittings and titanium fittings may be classified per 3.3.3.2 for construction.SAE MA4623 - 6 -3.3.3.2 Other Fittings: Other fittings including elbow

38、fittings shall preferably be of one piece construction, if possible. However, those made with other than one piece construction shall use welded and redrawn tubing in accordance with MIL-T-8504 or MIL-T-8808 and shall employ a butt-weld joint method per AS4488. Titanium tubes shall be in accordance

39、with AMS 4945 and employ a butt-weld joint method per MIL-STD-2219 or AS4488.3.3.3.3 End Fitting Collars (Sockets): All end fitting collars (sockets), crimped or swaged and fabricated from Type 304 stainless steel shall be capable of passing an embrittlement test as specified in ASTM A 262 Practice

40、E, prior to assembly to the nipple and crimp or swaging operation. Sockets fabricated from stabilized austenitic steel (304 L, 321, or 347) and titanium are acceptable without being subjected to the embrittlement test. Titanium collars are per ASTM B 348 - Grade 2.3.4 Dimensions:The hose assembly di

41、mensions, except for length, shall be as specified in Figure 1 and Table 1.3.4.1 Hose Weight: Hose consisting of inner tube, reinforcement, and outer layers as outlined in 3.3.1 and 3.3.2 shall not exceed the maximum hose weights covered in Table 2.3.5 Performance:The hose assembly shall meet the fo

42、llowing performance requirements:3.5.1 Tube:3.5.1.1 Tube Roll: The tube shall not leak, split, burst, or show any evidence of malfunction that would affect continued use of tube when rolled and tested to the applicable proof pressure values of MA2078 for 1 min. The test method is specified in 4.6.2.

43、1.3.5.1.2 PTFE Tube Proof Pressure: The tube, without reinforcement, shall not leak, burst, or show any evidence of malfunction, that would affect continued use of tube when pressurized to the Table 3 applicable proof pressure values of MA2078 for 1 min. Test method is specified in 4.6.2.1.3.5.1.3 T

44、ensile Strength: The longitudinal tensile strength for all sizes of tubes shall be 15 200 kPa minimum at 25 C 1 C. The transverse tensile strength for DN size 16 and larger shall be 2500 kPa minimum at the same temperature. For DN size 12 and smaller, the transverse tensile strength need not be test

45、ed. The test method is specified in 4.6.2.2.3.5.1.4 Elongation: Elongation at 25 C 1 C shall be a minimum of 200%. Test method is specified in 4.6.2.3.SAE MA4623 - 7 -FIGURE 1 - Hose and Fitting DimensionsTABLE 1 - Hose and Fitting Dimensions in mmSAE MA4623 - 8 -TABLE 2 - Physical Requirements of H

46、ose Assemblies and Weight of HoseTABLE 3 - Tube Roll Gap and Proof Pressure3.5.1.5 Specific Gravity: The specific gravity values of the hose inner tube shall not exceed 2.155 apparent and 2.190 relative. The test method is specified in 4.6.2.4.3.5.2 Hose Assembly: The reinforced hose assembled with

47、end fittings shall meet the following performance requirements:3.5.2.1 Proof Pressure: The hose assembly shall withstand the proof pressure listed in Table 2 without malfunction or leakage. The test method is specified in 4.6.3.3.5.2.2 Elongation and Contraction: The hose assembly shall not change i

48、n length by more than 5.0 mm in 250 mm of hose length, when subjected to the maximum operating pressure of Table 2 for a minimum of 5 min. The test method is specified in 4.6.4.SAE MA4623 - 9 -3.5.2.3 Volumetric Expansion: The volumetric expansion of the hose assemblies shall not exceed the limits s

49、pecified in Table 2. The test method is specified in 4.6.5.3.5.2.4 Leakage: The hose assembly shall not leak (no external wetting) or other malfunction when subjected to two pressure cycles of 66% of minimum room temperature burst pressure. The test method is specified in 4.6.6.3.5.2.5 Burst Pressure:3.5.2.5.1 Room Temperature Burst Pressure: The hose assembly shall not leak nor burst at any pressure below the burst value specified in Table 2. The test method is specified in 4.6.7.1.3.5.2.5.2 High Temperature Burst Pressure: The hose a