1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 10502:2012Aerospace Hose assemblies in polytetrafluoroethylene (PTFE) for use up to 232 C and 10 500 kPa Technical specifications and requirementsBS ISO 10502:2012 BRITISH
2、 STANDARDNational forewordThis British Standard is the UK implementation of ISO 10502:2012. The UK participation in its preparation was entrusted to T e c h n i c a l Committee ACE/69, Aerospace hydraulic systems, fluids and components.A list of organizations represented on this committee can be obt
3、ained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2012Published by BSI Standards Limited 2012ISBN 978 0 580 69736 4 ICS 49.080; 83.140.40 Comp
4、liance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2012.Amendments issued since publicationDate T e x t a f f e c t e dBS ISO 10502:2012 ISO 2012Aerospace Hose
5、 assemblies in polytetrafluoroethylene (PTFE) for use up to 232 C and 10 500 kPa Technical specifications and requirementsAronautique et espace Tuyauteries flexibles en polyttrafluorothylne (PTFE), pour utilisation jusqu 232 C et 10 500 kPa Spcifications techniques et exigencesINTERNATIONAL STANDARD
6、ISO10502Second edition2012-02-01Reference numberISO 10502:2012(E)BS ISO 10502:2012ISO 10502:2012(E)ii ISO 2012 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2012All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any mean
7、s, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightis
8、o.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 10502:2012ISO 10502:2012(E) ISO 2012 All rights reserved iiiContents PageForeword iv1 Scope 12 Normative references .13 Requirements .23.1 Qualification 23.2 Materials .23.3 Construction .23.4 Inner tube requirements 33.5 Hose 43.6 Screw threads .63
9、.7 Length tolerances .63.8 Part numbering of interchangeable parts .63.9 Identification of products 73.10 Workmanship 73.11 Hose assembly Test and performance requirements . 84 Responsibility for inspection .104.1 General .104.2 Classification of inspections 104.3 Qualification inspections 104.4 Qua
10、lity conformance inspections .134.5 Test conditions .144.6 Inspection methods 155 Preparation for delivery .155.1 Preservation and packaging .155.2 Marking .166 Ordering data 16Annex A (informative) Equivalent materials and components .17BS ISO 10502:2012ISO 10502:2012(E)ForewordISO (the Internation
11、al Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been e
12、stablished has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standard
13、ization.International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voti
14、ng. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such
15、patent rights.ISO 10502 was prepared by Technical Committee ISO/TC 20, Aircraft and space vehicles, Subcommittee SC 10, Aerospace fluid systems and components.This second edition cancels and replaces the first edition (ISO 10502:1992), which has been technically revised as follows:a) requirements ha
16、ve been aligned to ISO 8829-1;b) units in inches have been added;c) in 3.4.1, the requirement relating to relative density has been updated;d) in 3.7, length tolerances have been added;e) in 3.9.3, a requirement has been added to include as a permanent marking on the hose assembly the fire resistanc
17、e type according to ISO 2685;f) Annex A, dealing with equivalent materials and components, has been updated.iv ISO 2012 All rights reservedBS ISO 10502:2012INTERNATIONAL STANDARD ISO 10502:2012(E)Aerospace Hose assemblies in polytetrafluoroethylene (PTFE) for use up to 232 C and 10 500 kPa Technical
18、 specifications and requirements1 ScopeThis International Standard specifies requirements for polytetrafluoroethylene (PTFE) hose assemblies for use in aircraft hydraulic, fuel and lubricating oil systems at temperatures between -55 C (-67 F) and 232 C (450 F) for Class I assemblies and between -55
19、C (-67 F) and 135 C (275 F) for Class II assemblies, and at nominal pressures up to 10 500 kPa (1 523 psi) (105 bar1). The hose assemblies are also suitable for use within the same temperature and pressure limitations in aerospace pneumatic systems where some gaseous diffusion through the wall of th
20、e PTFE liner is tolerated.This International Standard covers hose assemblies of the following classes: class I: hose assemblies with fitting of corrosion-resistant steel or titanium parts 232 C (450 F); class II: hose assemblies with fitting of corrosion-resistant steel and aluminium parts 135 C (27
21、5 F), DN12 and larger.The hose assemblies specified in this International Standard are not intended for use in pneumatic storage systems. In addition, it is intended that installations in which the limits specified in this International Standard are exceeded, or in which the application is not cover
22、ed specifically by this International Standard, for example for oxygen, be subject to the approval of the purchaser.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated refer
23、ences, the latest edition of the referenced document (including any amendments) applies.ISO 2685, Aircraft Environmental test procedure for airborne equipment Resistance to fire in designated fire zonesISO 2859-1, Sampling procedures for inspection by attributes Part 1: Sampling schemes indexed by a
24、cceptance quality limit (AQL) for lot-by-lot inspectionISO 5855-3, Aerospace MJ threads Part 3: Limit dimensions for fittings for fluid systemsISO 6772, Aerospace Fluid systems Impulse testing of hydraulic hose, tubing and fitting assembliesISO 7258, Polytetrafluoroethylene (PTFE) tubing for aerospa
25、ce applications Methods for the determination of the density and relative densityISO 8829-1:2009, Aerospace Test methods for polytetrafluoroethylene (PTFE) inner-tube hose assemblies Part 1: Metallic (stainless steel) braid1) 1 bar = 100 kPa. ISO 2012 All rights reserved 1BS ISO 10502:2012ISO 10502:
26、2012(E)3 Requirements3.1 QualificationHose assemblies supplied in accordance with this International Standard shall be representative of products which have been subjected to, and have successfully passed, the tests specified in this International Standard, and which meet the requirements of this In
27、ternational Standard.3.2 Materials3.2.1 GeneralThe hose assemblies shall be uniform in quality and free from defects in material as is consistent with good manufacturing practice. They shall conform to the applicable specifications and requirements of this International Standard.3.2.2 MetalsCorrosio
28、n-resistant steel shall be used for the hose; fittings shall be of corrosion-resistant steel, titanium, or aluminium alloy suitably treated to resist corrosion when in storage or during normal service use. Metals shall conform to the applicable specifications given in Table 1 (or equivalent specific
29、ations; see Annex A).Table 1 Metals for use in hose assembliesForm MetalMaterial No. (see Annex A)Bars and forgingsAustenitic, annealed or as-rolled, corrosion-resistant steel 1Austenitic, annealed or as-rolled, heat-stabilized, corrosion-resistant steel 2 and 3Precipitation-hardening, corrosion-res
30、istant steel; solution heat treated and in artificially aged condition4, 5 and 6Titanium 6Al-4V 7 and 23Aluminium alloy 2014 17Aluminium alloy 2024 18Aluminium alloy 6061 19 and 20TubingAustenitic, seamless or welded, annealed, corrosion-resistant steel 8Austenitic, seamless or welded, stabilized, c
31、orrosion-resistant steel 9 and 10Titanium 3Al-2,5V 11Titanium T40 24Aluminium alloy 5052 21Aluminium alloy 6061 22Wire Austenitic, cold-drawn, corrosion-resistant steel 12, 13 and 143.3 Construction3.3.1 GeneralThe hose assembly shall consist ofa) a seamless PTFE inner tube (see 3.3.2),b) corrosion-
32、resistant steel-wire reinforcement (see 3.3.3), andc) aluminium, corrosion-resistant steel or titanium end-fittings (see 3.3.4),2 ISO 2012 All rights reservedBS ISO 10502:2012ISO 10502:2012(E)as required to meet the construction and performance requirements of this International Standard and as requ
33、ired for its intended use.3.3.2 Inner tubeThe 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 from pitting or projections on the inner surface. Additives may be included in the compound from which the tube is extrude
34、d.3.3.3 ReinforcementThe reinforcement shall consist of corrosion-resistant steel wires conforming to the applicable specifications given in 3.2.2. The wires shall be arranged on the outside surface of the inner tube so as to provide sufficient strength to ensure compliance with the requirements of
35、this International Standard.Broken or missing reinforcing wires or buckled wires more than 1,5 mm (0.06 in) above the outside diameter surface shall be cause for rejection. Crossed-over reinforcing wires need not be cause for rejection of the hose assembly.3.3.4 Fittings3.3.4.1 GeneralIt shall be pr
36、oven that all fittings comply with the requirements of this International Standard. The hose attachment fitting may be of a permanent or of a reusable design.Unless otherwise specified by the purchaser, the hose assembly end fittings shall have 24 cone fittings.3.3.4.2 Insert fittingsInsert fittings
37、 shall be manufactured in one piece wherever possible. Those constructed of more than one piece shall have either welded joints using butt-weld or lap-weld design, or braze joints using lap-braze design, fabricated from annealed corrosion-resistant steel, titanium or aluminium alloy tubing. Welded a
38、nd redrawn tubing (materials No. 8 and No. 9; see Annex A) may be used for corrosion-resistant steel.3.4 Inner tube requirements3.4.1 Density and relative densityThe relative density of the hose inner tube shall not exceed 2,210 g/cm3(0.079 8 lb/in3) when tested in accordance with ISO 7258, either m
39、ethod A or method B (as specified in ISO 8829-1). The density shall not exceed 2,155 g/cm3(0.077 9 lb/in3) when tested in accordance with ISO 7258, method C (as specified in ISO 8829-1).3.4.2 Tensile strengthWhen tested in accordance with ISO 8829-1:2009, 4.2, the longitudinal tensile strength for a
40、ll sizes of tubes shall be at least 15,1 N/mm2(2 190 psi)2).When tested in accordance with ISO 8829-1, the transverse tensile strength for sizes DN16 and larger shall be at least 12,4 N/mm2(1 798 psi); for sizes under DN16, the transverse strength need not be tested.3.4.3 ElongationWhen tested in ac
41、cordance with ISO 8829-1, the elongation shall be at least 200 %.2) 1 N/mm2= 1 MPa. ISO 2012 All rights reserved 3BS ISO 10502:2012ISO 10502:2012(E)3.4.4 Tube rollThe tube shall not leak, split, burst or show any signs of malfunction, when tested through the sequence specified in ISO 8829-1.3.4.5 Tu
42、be proof pressureAfter being subjected to the tube roll test sequence (see 3.4.4), the tube, without reinforcing wires, shall not leak, burst or show any signs of malfunction, when tested as specified in ISO 8829-1.3.4.6 Electrical conductivityWhen tested in accordance with ISO 8829-1:2009, 4.4, the
43、 electrical current shall be greater than or equal toa) 10 A for sizes DN05 to DN12 (incl.), orb) 20 A for sizes DN16 and over.3.5 Hose3.5.1 Dimensional requirementsThe hose assembly dimensions, except for length, shall be as specified in Figure 1 and Table 2.aWidth across corners of nut and socket
44、hexagon may exceed the values given for Df(see footnote b of Table 2).Figure 1 Hose and fitting dimensions4 ISO 2012 All rights reservedBS ISO 10502:2012ISO 10502:2012(E)Table 2 Hose and fitting dimensions (see Figure 1)Dimensions in millimetres (inches)Hose dash sizeHose sizeHose (braided) FittingA
45、ttachment lengthWall thickness of inner tubeNumber of braidsInside diameterOutside diameterInside diameteraOutside diameterbdhDhdfDfl (nom.) min. min. max. min. max. max. min. max.03 DN052,3 (0.091)5,8 (0.228)6,8 (0.268)2 (0.079)12,7 (0.500)31,8 (1.252)0,89 (0.035)1,19 (0.047)104 DN064,4 (0.173)7,7
46、(0.303)9,5 (0.374)3,4 (0.134)14,2 (0.559)31,8 (1.252)05 DN085,8 (0.228)9,3 (0.366)10,6 (0.417)4,9 (0.193)16 (0.630)34,3 (1.350)06 DN107,6 (0.299)10,9 (0.429)12,7 (0.500)6,5 (0.256)18 (0.709)37 (1.457)08 DN129,9 (0.390)13,9 (0.547)15,6 (0.614)8,5 (0.335)21,4 (0.843)44 (1.732)0,97 (0.038)1,27 (0.050)1
47、0 DN1612,3 (0.484)16,3 (0.642)20,3 (0.799)11 (0.433)26 (1.024)49 (1.930)1,07 (0.042)1,37 (0.054)12 DN2015,6 (0.614)19,5 (0.768)23,0 (0.906)13,8 (0.543)30 (1.181)55,1 (2.169)16 DN2521,6 (0.850)27,4 (1.079)29,0 (1.142)19,7 (0.776)38,6 (1.520)65 (2.559)220 DN3228 (1.102)33,7 (1.327)35,3 (1.390)25,4 (1.
48、000)50,8 (2.000)66,1 (2.600)1,14 (0.045)1,45 (0.057)24 DN4034,1 (1.343)41,6 (1.638)43,3 (1.705)31,7 (1.248)58 (2.283)68,1 (2.681)1,65 (0.065)1,96 (0.077)aMinimum inside diameter through the elbow area may be 0,8 mm (0.031 in) less than the values given for df.bWidth across corners of nut and socket
49、hexagon may exceed the values given for Df.3.5.2 Physical requirementsHose assemblies shall comply with the physical and linear density (weight) requirements; refer to the relative dash size as specified in Table 3.3.5.3 Bore checkWhen bent to the appropriate minimum bend radius as specified in Table 3, the hose assembly shall permit the free passage of a solid rigid sphere throughout its length. The diameter of the sphere shall be 90 % of the appropriate minimum internal d
