1、BS EN ISO6802:2008ICS 23.040.70NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDRubber and plasticshoses and hoseassemblies with wirereinforcements Hydraulic impulsetest with flexing (ISO6802:2005)This British Standardwas published under theauthority of the Stand
2、ardsPolicy and StrategyCommittee on 31 December2008 BSI 2008ISBN 978 0 580 54304 3Amendments/corrigenda issued since publicationDate CommentsBS EN ISO 6802:2008National forewordThis British Standard is the UK implementation of EN ISO 6802:2008. Itis identical to ISO 6802:2005. It supersedes BS EN 26
3、802:1993 which iswithdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee PRI/66, Rubber and plastics tubing, hoses and hoseassemblies.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to in
4、clude all the necessary provisionsof a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 6802November 2008ICS 23.040.70 Supersedes EN 26802:1993 English Ver
5、sionRubber and plastics hoses and hose assemblies with wirereinforcements - Hydraulic impulse test with flexing (ISO6802:2005)Tuyaux et flexibles en caoutchouc et en plastique renforcspar des fils mtalliques - Essai dimpulsions hydrauliquesavec flexions (ISO 6802:2005)This European Standard was appr
6、oved by CEN on 29 October 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationals
7、tandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified
8、 to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Ne
9、therlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation
10、in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 6802:2008: EBS EN ISO 6802:2008EN ISO 6802:2008 (E) 3 Foreword The text of ISO 6802:2005 has been prepared by Technical Committee ISO/TC 45 “Rubber and rubber products” of the International Organization for Stand
11、ardization (ISO) and has been taken over as EN ISO 6802:2008 by Technical Committee CEN/TC 218 “Rubber and plastics hoses and hose assemblies” the secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by publication of an identical text
12、or by endorsement, at the latest by May 2009, and conflicting national standards shall be withdrawn at the latest by May 2009. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for id
13、entifying any or all such patent rights. This document supersedes EN 26802:1993. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denma
14、rk, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 6802:2005 has been approved
15、 by CEN as a EN ISO 6802:2008 without any modification. BS EN ISO 6802:2008ISO 6802:2005(E) ISO 2005 All rights reserved iiiContents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references . 1 3 Test methods. 1 4 Apparatus 1 5 Test piece 3 6 Procedure 3 7 Test report . 3 BS EN ISO 6802:20
16、08ISO 6802:2005(E) iv ISO 2005 All rights reservedForeword ISO (the International 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
17、 member body interested in a subject for which a technical committee has been established 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 Internationa
18、l Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. 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
19、 adopted by the technical committees are circulated to the member bodies for voting. 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
20、 patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 6802 was prepared by Technical Committee ISO/TC 45, Rubber and rubber products, Subcommittee SC 1, Hoses (rubber and plastics). This third edition cancels and replaces the second edition (ISO 6802:19
21、91), which has been technically revised. BS EN ISO 6802:2008ISO 6802:2005(E) ISO 2005 All rights reserved vIntroduction Hydraulic hoses and hose assemblies are frequently flexed in service. As there may be a need to take this into account during testing, this International Standard provides a standa
22、rd method of flexing during impulse testing. BS EN ISO 6802:2008BS EN ISO 6802:2008INTERNATIONAL STANDARD ISO 6802:2005(E) ISO 2005 All rights reserved 1Rubber and plastics hoses and hose assemblies with wire reinforcements Hydraulic impulse test with flexing 1 Scope This International Standard desc
23、ribes a pressure impulse test with flexing for wire-reinforced rubber and plastics hydraulic hoses and hose assemblies. The test is applicable to high-pressure hydraulic hoses and hose assemblies, which are subject to pulsating pressure in service. This International Standard describes two methods o
24、f flexing the hose or hose assembly. The actual pressure impulse test is described in ISO 6803. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest e
25、dition of the referenced document (including any amendments) applies. ISO 6803, Rubber or plastics hoses and hose assemblies Hydraulic-pressure impulse test without flexing 3 Test methods Two methods of flexing are described: method 1 which uses a revolving manifold as shown in Figure 1, and method
26、2 which uses a horizontally sliding manifold as shown in Figure 2. When no requirement is stated in the product standard, use method 1. 4 Apparatus The apparatus consists of a flex test rig, on which the test pieces can be installed, capable of producing flexing in the ways shown in Figures 1 and 2.
27、 The rig comprises a stationary manifold and a movable manifold, the latter being capable of either executing a revolving motion (see Figure 1) or executing a horizontally reciprocating (to-and-fro) motion (see Figure 2). The centreline of the stationary manifold is at the same height as, and parall
28、el to, the centre of rotation of the revolving manifold or at the same height as the centre of the horizontally reciprocating manifold. The movable manifold is geared so that it stays parallel to the stationary manifold at all times. The number of revolving or to-and-fro cycles executed per minute b
29、y the movable manifold shall be within 34 % to 38 % of the number of impulse cycles produced per minute, i.e. the number of flex cycles executed during any given length of time is in a definite proportion to the number of impulse cycles. The vertical centreline through the stationary manifold at eac
30、h coupling is a distance l from the centre of rotation or centre of reciprocating motion of the movable manifold. In each case, the hose is subjected to a back-bending motion, with its inside radius being bent to a radius smaller than the minimum bend radius and the radius near each coupling being b
31、ent to a radius larger than the minimum bend radius. BS EN ISO 6802:2008ISO 6802:2005(E) 2 ISO 2005 All rights reservedKey 1 test pressure inlet 2 fluid circulation line 3 check valve Figure 1 Apparatus for hydraulic impulse test with flexing using a revolving manifold Key 1 test pressure inlet 2 fl
32、uid circulation line 3 check valve 4 horizontal reciprocating motion Figure 2 Apparatus for hydraulic impulse test with flexing using a horizontally reciprocating manifold BS EN ISO 6802:2008ISO 6802:2005(E) ISO 2005 All rights reserved 3The distance l shall be calculated, to an accuracy of 2 mm, us
33、ing the equation b, min ext1, 7 5lr d=+ where rb, min is the minimum bend radius; dext is the external diameter of the hose. 5 Test piece The free length of hose L measured between the couplings shall be calculated, to an accuracy of 15 mm, using the equation b, min ext4,14 3,57L rd=+ where rb, mina
34、nd dextare as defined in Clause 4. A minimum of four test pieces shall be tested. The minimum bend radius will be specified in the International Standard for the product concerned. 6 Procedure Attach one end of the test piece assembly to the movable manifold of the apparatus and attach the other end
35、 to the stationary manifold. Carry out the pressure impulse test by the method described in ISO 6803. Start the test and continue until failure or until the number of cycles specified in the relevant product standard has been completed. If a failure occurs within 25 mm of one of the end couplings, i
36、t shall be regarded as a coupling failure and recorded as such. 7 Test report The test report shall include the following information: a) a reference to this International Standard; b) a full description of the hose or hose assembly tested; c) the method used (method 1 or method 2); d) the test temp
37、erature; e) the test pressure; f) the test fluid; g) the rate of pressure rise; h) the impulse cycle rate; i) the flexing frequency; BS EN ISO 6802:2008ISO 6802:2005(E) 4 ISO 2005 All rights reservedj) the number of impulse cycles to failure, or the number of impulse cycles completed, for each test
38、piece; k) the position of the failure and the mode of failure for each test piece, or the condition of each test piece on completion of the test; l) the date of the test. BS EN ISO 6802:2008BS EN ISO6802:2008BSI GroupHeadquarters 389Chiswick High Road,London, W4 4AL, UKTel +44 (0)20 8996 9001Fax +44
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