1、March 2010 Translation by DIN-Sprachendienst.English price group 7No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 2
2、3.100.40!$zM“1618742www.din.deDDIN EN ISO 6802Rubber and plastics hoses and hose assemblies with wirereinforcements Hydraulic impulse test with flexing (ISO 6802:2005)English translation of DIN EN ISO 6802:2010-03Gummi- und Kunststoffschluche und Schlauchleitungen mit Drahtgeflechteinlage Hydraulik-
3、Impulsprfung mit wechselnder Biegung (ISO 6802:2005)Englische bersetzung von DIN EN ISO 6802:2010-03Tuyaux et flexibles en caoutchouc et en plastique renforcs par des fils mtalliques Essai dimpulsions hydrauliques avec flexions (ISO 6802:2005)Traduction anglaise de DIN EN ISO 6802:2010-03SupersedesD
4、IN EN 26802:1993-02www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 10 pages03.10 DIN EN ISO 6802:2010-03 2 A comma is used as the decimal marker. National foreword This document has been prepared by Technical Committee ISO/TC 45 “Rubber
5、 and rubber products”, (Secretariat: DSM, Malaysia), Subcommittee SC 1 “Hoses” (Secretariat: DSM, Malaysia), and has been adopted as EN ISO 6802:2008 by Technical Committee CEN/TC 218 “Rubber and plastics hoses and hose assemblies” (Secretariat: BSI, United Kingdom). The responsible German body invo
6、lved in its preparation was the Normenausschuss Kautschuktechnik (Rubber Technology Standards Committee), Working Committee NA 045-02-12 AA Schluche. The DIN Standard corresponding to the International Standard referred to in this document is as follows: ISO 6803 DIN EN ISO 6803 Amendments This stan
7、dard differs from DIN EN ISO 26802:1993-02 as follows: a) The standard has been brought in line with the current rules of presentation. b) The standard has been editorially and technically revised. c) Clause 3, method 1 (revolving manifold) has been included. d) Clause 3, method 2 (horizontally slid
8、ing manifold) has been included. Previous editions DIN 6802: 1985-01 DIN EN 26802: 1993-02 National Annex NA (informative) Bibliography DIN EN ISO 6803, Rubber or plastics hoses and hose assemblies Hydraulic-pressure impulse test without flexing EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN I
9、SO 6802 November 2008 ICS 23.040.70 Supersedes EN 26802:1993 English Version Rubber and plastics hoses and hose assemblies with wire reinforcements - Hydraulic impulse test with flexing (ISO 6802:2005) Tuyaux et flexibles en caoutchouc et en plastique renforcs par des fils mtalliques - Essai dimpuls
10、ions hydrauliques avec flexions (ISO 6802:2005) Gummi- und Kunststoffschluche und Schlauchleitungen mit Drahtgeflechteinlage - Hydraulik-Impulsprfung mit wechselnder Biegung (ISO 6802:2005) This European Standard was approved by CEN on 29 October 2008. CEN members are bound to comply with the CEN/CE
11、NELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to a
12、ny CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions
13、. 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, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
14、 Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Me
15、mbers. Ref. No. EN ISO 6802:2008: EContents 2 EN ISO 6802:2008 (E) DIN EN ISO 6802:2010-03 Page Foreword .3 Introduction.4 1 Scope5 2 Normative references5 3 Test methods .5 4 Apparatus.5 5 Test piece .7 6 Procedure.7 7 Test report7 Foreword The text of ISO 6802:2005 has been prepared by Technical C
16、ommittee ISO/TC 45 “Rubber and rubber products” of the International Organization for Standardization (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 sh
17、all be given the status of a national standard, either by publication of an identical text 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 m
18、ay be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying 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
19、implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzer
20、land and the United Kingdom. Endorsement notice The text of ISO 6802:2005 has been approved by CEN as a EN ISO 6802:2008 without any modification. 3 DIN EN ISO 6802:2010-03 EN ISO 6802:2008 (E) Introduction Hydraulic hoses and hose assemblies are frequently flexed in service. As there may be a need
21、to take this into account during testing, this International Standard provides a standard method of flexing during impulse testing. 4 EN ISO 6802:2008 (E) DIN EN ISO 6802:2010-03 1 Scope This International Standard describes a pressure impulse test with flexing for wire-reinforced rubber and plastic
22、s 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 of flexing the hose or hose assembly. The actual pressure impulse test is describe
23、d 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 edition of the referenced document (including any amendments) applies. ISO 6803, R
24、ubber 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 2 which uses a horizontally sliding manifold as shown in Figure 2. When no requir
25、ement 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. The rig comprises a stationary manifold and a movable manifold, the latter being
26、 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 parallel to, the centre of rotation of the revolving manifold or at the same height as
27、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 by the movable manifold shall be within 34 % to 38 % of the number of impulse cycl
28、es 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 each coupling is a distance l from the centre of rotation or centre of reciprocating
29、 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 bent to a radius larger than the minimum bend radius. 5 DIN EN ISO 6802:2010-03 EN
30、 ISO 6802:2008 (E) Key 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 fluid circulation line 3 check valve 4 horizontal reciprocating motion Figure 2 Apparatus for hydrauli
31、c impulse test with flexing using a horizontally reciprocating manifold 6 EN ISO 6802:2008 (E) DIN EN ISO 6802:2010-03 The distance l shall be calculated, to an accuracy of 2 mm, using the equation b, min ext1, 7 5lr d=+ where rb, min is the minimum bend radius; dext is the external diameter of the
32、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, minand dextare as defined in Clause 4. A minimum of four test pieces shall be tested. The minimum bend radius will be speci
33、fied 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 to the stationary manifold. Carry out the pressure impulse test by the method described in ISO 6803. Start the test an
34、d 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, it shall be regarded as a coupling failure and recorded as such. 7 Test report The test report shall include the followi
35、ng 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 temperature; e) the test pressure; f) the test fluid; g) the rate of pressure rise; h) the impulse cycle rate; i) the flexi
36、ng frequency; 7 DIN EN ISO 6802:2010-03 EN ISO 6802:2008 (E) j) the number of impulse cycles to failure, or the number of impulse cycles completed, for each test 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. 8 EN ISO 6802:2008 (E) DIN EN ISO 6802:2010-03
