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 reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2008 SAE International All rights reserved. No part of this publication m
3、ay 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: 724-776-4970 (outside USA)
4、 Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org AS5951C AEROSPACE STANDARD Issued 2004-09 Revised 2008-01 Superseding AS5951B Hose Assembly, Polytetrafluoroethylene, Para-Aramid Reinforced, 5080 psi (35,000 kPa), 275 F (135 C), Aircraft Hydraulic Systems RATIONALE
5、 Revised impulse and vibration test sample lengths and other minor corrections. 1. SCOPE This document defines the requirements for polytetrafluoroethylene (PTFE) lined, para-aramid reinforced, hose assemblies suitable for use in 275 F (135 C), 5080 psi (35,000 kPa) aircraft hydraulic systems. NOTE:
6、 The SI metric units defined herein are soft conversion units. 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 shall apply. The applicable issue of other publications shall be the
7、 issue in effect on the date of the purchase order. In the event of conflict between the text of this specification and references cited herein, the text of this specification takes precedence. Nothing in this specification, however, supersedes applicable laws and regulations unless a specific exemp
8、tion has been obtained. 2.1.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. AMS 2486 Conversion Coating of Titanium Alloys, Fluoride-Phosphate Type AMS 2487 A
9、nodic Treatment of Titanium and Titanium and Titanium Alloys Solution pH 12.4 Maximum AMS 2700 Passivation of Corrosion Resistant Steels AMS 4928 Bars and Forgings - 6Al 4V, Annealed - 120,000 psi AMS 4965 Bars, Wire, Forgings and Rings - 6Al 4V, Solution Heat Treated and Aged AMS 5637 Steel Bars, C
10、orrosion-Resistant. 18Cr - 10Ni (SAE 30302) Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AS5951C - 2 - AMS 5639 Steel Bars, Forgings, Tubing, and Rings, Corrosion-Resistant, 19Cr - 10Ni (SAE 3
11、0304) AMS 5647 Bars and Forgings, 304L CRES (S30403) AMS 5645 Bars and Forgings, 321 CRES (S32100) AMS 5646 Bars and Forgings, 347 CRES (S34700) AMS 5656 Bars and Forgings, 21-6-9 CRES AMS-QQ-P-35 Passivation Treatments for Corrosion-Resistant Steel ARP603 Impulse Testing of Hydraulic Hose Assemblie
12、s, Tubing and Fittings AS611 Hose Assembly and Tubing, Polytetrafluoroethylene, Cleaning Methods ARP908 Torque Requirements, Installation and Qualification Test, Hose and Tube Fittings AS1073 Sleeve, Hose Assembly, Heat Shrinkable Polytetrafluoroethylene Tubing AIR1228 Standard Impulse Machine Equip
13、ment Operation AS1241 Fire Resistant Phosphate Ester Hydraulic Fluid for Aircraft ARP1835 Preparation for Delivery, General Requirements for Hose Assemblies AS2078 Test Methods, Hose Assemblies, Polytetrafluoroethylene (PTFE) ARP4266 Hole Contour, Fluid Passage, Tube Fitting AS4458 Fluid Storage Dev
14、ices - Pressure Vessels, Gas Cylinders - Pressure Equipment - Manufacture AS478 Identification Marking Methods AS5272 Lubricant, Solid Film, Heat Cured, Corrosion Inhibiting AS5685 Steel, Corrosion Resistant, Safety Wire, 18Cr - 11.5Ni (UNS S30500) Solution Heat Treated, Cold Finished AS5827 Fitting
15、 End, Flareless, Extra Fine Thread, Design Standard AS7003 National Aerospace and Defense Contractors Accreditation Program (NADCAP) AS7112 National Aerospace and Defense Contractors Accreditation Program Requirements for Fluid System Components AS8879 Screw Threads, Controlled Radius Root With Incr
16、eased Minor Diameter, General Specification of AS4207 Fitting End, External Thread, Beam Seal, Design Standard AS85720 Fittings, Tube, Fluid Systems, Separable, High Pressure Dynamic Beam Seal, General Specifications AS85720/1 Fitting Tube, Fluid Systems, Separable, High Pressure Dynamic Beam Seal,
17、Design Standard Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AS5951C - 3 - 2.1.2 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, T
18、el: 610-832-9585, www.astm.org. ASTM A 262 Detecting Susceptibility to Intergranular Attack on Stainless Steel ASTM B 348 Specification for Titanium and Titanium Alloy Bars and Billets 2.1.3 U.S. Government Publications Available from the Document Automation and Production Service (DAPS), Building 4
19、/D, 700 Robbins Avenue, Philadelphia, PA 19111-5094, Tel: 215-697-6257, http:/assist.daps.dla.mil/quicksearch/. MIL-PRF-680 Dry Cleaning Solvent MIL-PRF-5606 Hydraulic Fluid, Petroleum Base, Aircraft, Missile, and Ordinance MIL-HDBK-831 Preparation of Test Reports MIL-PRF-83282 Hydraulic Fluid, Fire
20、-Resistant, Synthetic, Hydrocarbon Base, Aircraft MIL-PRF-87257 Hydraulic Fluid, Fire Resistant, Low Temperature, Synthetic Hydrocarbon Base, Aircraft and Missile 2.1.4 NAS Publications Available from Aerospace Industries Association, 1000 Wilson Boulevard, Suite 1700, Arlington, VA 22209-3928, Tel:
21、 703-358-1000, www.aia-aerospace.org. NAS 847 Caps and Plugs, Protective, Dust and Moisture Seal NAS 1760 Fitting End, Flareless Acorn, Standard Dimensions for 2.1.5 ASME Publications Available from ASME, 22 Law Drive, P.O. Box 2900, Fairfield, NJ 07007-2900, Tel: 973-882-1170, www.asme.org. ASME B4
22、6.1 Surface Texture ASME Y14.100 Engineering Drawing Practices 2.1.6 PRI Publications Available from Performance Review Institute, 161 Thornhill Road, Warrendale, PA 15086-7527, Tel: 724-772-1616, www.pri-network.org. PD2001 Qualified Product Management Council Procedures for Qualified Products Grou
23、p PD2101 Aerospace Quality Assurance, Product Standard, Qualification Procedures, Fluid Systems Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AS5951C - 4 - 2.1.7 RTCA Publications Available fro
24、m Radio Technical Commission for Aeronautics, Inc., 1828 L Street, NW, Suite 805, Washington, DC 20036, Tel: 202-833-9339, www.rtca.org. DO-160 Environmental Conditions and Test Procedure for Airborne Equipment 3. TECHNICAL REQUIREMENTS 3.1 Qualification Hose assemblies supplied in accordance with t
25、his document shall be representative of products which have been subjected to and which have successfully passed the qualification tests specified in this standard. 3.1.1 Manufacturer Qualification A manufacturer producing a product in conformance to this procurement specification shall be accredite
26、d in accordance with the requirements of PD2101, AS7003 and AS7112, and shall be listed in a Performance Review Institute (PRI) Qualified Manufacturers List (QML). 3.1.2 Product Qualification All products shall conform to the requirements of this procurement specification and shall be approved in ac
27、cordance with the requirements of PD2001, and PD2101, for listing in a Performance Review Institute (PRI) Qualified Parts List (QPL). When this performance specification is specified on a design activity controlled drawing, the approved source of supply shall be defined by the design activity. 3.2 M
28、aterials The hose assembly materials shall be uniform in quality, free from defects, consistent with good manufacturing practice, and shall conform to applicable specifications and the requirements specified herein. 3.2.1 Metals Metals used in the fittings shall be titanium and corrosion-resistant s
29、teel and shall conform to the following specifications: 3.2.1.1 Bars and Forgings - AMS 4928 6Al-4V Titanium - Annealed - AMS 4965 6Al-4V Titanium - Solution Treated - AMS 5637 302 CRES - AMS 5639 304 CRES - AMS 5645 321 CRES - AMS 5646 347 CRES - AMS 5647 304L CRES - AMS 5656 21-6-9 CRES - ASTM B 3
30、48 Grade 2 - Titanium Alloy Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AS5951C - 5 - 3.2.2 Wire - AS5685 305 CRES 3.2.3 Reinforcement Para-aramid textile treated, as required, and applied to
31、 the hose with an outer polyester, polybenzimidazol/para-aramid blend or air textured nylon braid cover to meet all the requirements herein. 3.3 Design and Construction The hose assembly shall consist of a seamless PTFE inner tube, para-aramid reinforcement, polyester, polybenzimidazol/para-aramid b
32、lend or air textured nylon outer braid cover and titanium end fittings, which may have corrosion resistant sockets/collars 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 PTFE resin of
33、uniform gage. It shall have a smooth bore and shall be free from pitting 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 be a wrapped or braided para-aramid yarn. The reinforcement shall be ar
34、ranged over the inner tube to provide sufficient strength and protection to ensure conformance with the requirements specified herein. Broken reinforcement cords shall be cause for rejection. The reinforcement shall be a color different than the cover material. 3.3.3 Fluid Barrier A full coverage fl
35、uid barrier shall be used between the reinforcement and cover. 3.3.4 Cover The cover shall be a braided polyester, polybenzimidazol/para-aramid blend or air textured nylon. The cover braid shall provide 100% coverage to protect the para-aramid reinforcement from exposure to ultraviolet light, ozone
36、and abrasion. The cover material may be black in color but shall be sufficiently treated to protect against ultraviolet light. There shall be two continuous lay lines, white or other vivid color, consisting of a 4-1/8 inch wide solid stripe, number AS5951/and suppliers name or trademark. 3.3.5 Fitti
37、ngs All fittings shall be permanently attached. Standard hose assemblies shall have flareless fittings according to NAS 1760, AS4458 or equivalent to mate with AS5827, or dynamic beam seal fittings to mate with male end per AS85720/1 or AS4207. Anti-torque hexes or flats shall be provided on fitting
38、s and shall fit standard wrench openings. All internal surfaces of fitting nuts and retainer wire, when used, shall be dry filmed with dry film per AS5272. Dry film on external surfaces and overspray is not cause for rejection. 3.3.5.1 Straight and Standard Shaped Fittings Straight fittings shall be
39、 machined and standard shapes shall be forged or machined. The hose assembly fitting material shall be titanium, except the collar and swivel nut retaining wire may be corrosion resistant steel (CRES). For elbow fittings, the inside corner shall be a radius in accordance with ARP4266. Copyright SAE
40、International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AS5951C - 6 - 3.3.5.2 End Fitting Collars (Sockets) All end fitting collars (sockets), crimped or swaged, and fabricated from Type 304 stainless steel are requir
41、ed to 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. Embrittlement tests are not required on sockets fabricated from stabilized austenitic steel (304L, 321, or 347) and titanium. Titanium collars are
42、per ASTM B 348 - Grade 2. 3.3.5.3 Finish 3.3.5.3.1 Corrosion Resistant Steel Parts Unless otherwise specified, corrosion resistant steel parts shall be passivated in accordance with AMS 2700 or AMS-QQ-P-35. 3.3.5.3.2 Titanium Alloy Parts Titanium alloy parts shall be fluoride phosphate coated per AM
43、S 2486 or titanium anodized per AMS 2487 unless otherwise specified. 3.3.6 Dimensions The hose assembly dimensions, except for length, shall be as specified in Figure 1 and Table 1. 3.3.7 Hose Weight Hose consisting of inner tube, reinforcement, fluid barrier and outer cover as outlined in 3.3.1 thr
44、ough 3.3.4 shall not exceed the maximum hose weights specified in Table 2. Socket or Nipple Hex/Flat Required on Straights;Socket Hex/Flat Optional on Elbow FittingFIGURE 1 - HOSE AND FITTING DIMENSIONS Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction o
45、r networking permitted without license from IHS-,-,-SAE AS5951C - 7 - TABLE 1A - HOSE AND FITTING DIMENSIONS AS SHOWN IN FIGURE 1 - U.S. INCH-POUND UNITS Unbraided PTFE Wall Thickness Spherical Ball Size for Determining Min. Hose Assy ID/3/ T Straight Elbow Hose Size Rigid Tube OD (Ref.) Fitting OD
46、A Max /1/ Fitting ID B /2/ (Ref.) Socket Length C Max Hose ID D Min Hose OD E Min Hose OD E Max Ref. Fittings Fittings04 .250 .78 .133 1.53 .212 .420 .590 .042 .120 .113 06 .375 .90 .226 1.72 .298 .525 .760 .045 .203 .192 08 .500 1.08 .330 1.94 .391 .750 .925 .045 .297 .280 10 .625 1.20 .410 2.47 .4
47、85 .870 .985 .045 .369 .349 12 .750 1.40 .510 3.26 .602 .980 1.180 .050 .459 .434 16 1.000 1.84 .760 3.69 .852 1.264 1.580 .056 .684 .646 /1/ Cross Corners of nut and socket hex may exceed “A” dimension. /2/ “Fitting ID B” is the minimum of the machined nipple/insert, before assembling the hose. It
48、is used to calculate the inspection “spherical ball size” to be used after the fitting has been swaged/crimped. /3/ Minimum specified inside diameter shall be verified by passing the applicable size spherical ball through the hose assembly. TABLE 1B - HOSE AND FITTING DIMENSIONS AS SHOWN IN FIGURE 1 - SI UNITS (CM) Unbraided PTFE Wall Thickness Spherical Ball Size for Determining Min. Hose Assy ID/3/ T Straight Elbow Hose Size Hose Size (mm) (Ref.) Fitting OD A Max /1/ Fitting ID B Min /2/ (Ref.) Socket Length C Max Hose ID D Min Hose OD E Min Hos
