BS EN ISO 6803-2017 Rubber or plastics hoses and hose assemblies Hydraulic-pressure impulse test without flexing《橡胶或塑料软管及软管组件 无挠性液压脉冲试验》.pdf

1、BS EN ISO 6803:2017Rubber or plastics hoses andhose assemblies Hydraulic-pressure impulse test withoutflexing (ISO 6803:2017)BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS EN ISO 6803:2017 BRITISH STANDARDNational forewordThis British Standard is the UK implement

2、ation of EN ISO 6803:2017. It supersedes BS EN ISO 6803:2008 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee PRI/66, Rubber and plastics tubing, hoses and hose assemblies.A list of organizations represented on this committee can be obtained on request

3、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 2017.Published by BSI Standards Limited 2017ISBN 978 0 580 89091 8 ICS 23.040.70; 23.100.40Compliance with a

4、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 2017.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EUROPISCH

5、E NORM EN ISO 6803 March 2017 ICS 23.040.70; 23.100.40 Supersedes EN ISO 6803:2008English Version Rubber or plastics hoses and hose assemblies - Hydraulic-pressure impulse test without flexing (ISO 6803:2017) Tuyaux et flexibles en caoutchouc ou en plastique - Essai dimpulsions de pression hydrauliq

6、ue sans flexion (ISO 6803:2017) Gummi- oder Kunststoffschluche und -schlauchleitungen - Hydraulik-Druck-Impulsprfung ohne Biegung (ISO 6803:2017) This European Standard was approved by CEN on 10 September 2016. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate

7、 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-CENELEC Management Centre or to any CEN member. This European Stand

8、ard 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-CENELEC Management Centre has the same status as the official versions. CEN members are the nati

9、onal standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Ser

10、bia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CEN All rights of exploitation in any form and by

11、 any means reserved worldwide for CEN national Members. Ref. No. EN ISO 6803:2017 EBS EN ISO 6803:2017EN ISO 6803:2017 (E) 3 European foreword This document (EN ISO 6803:2017) has been prepared by Technical Committee ISO/TC 45 “Rubber and rubber products“ in collaboration with Technical Committee CE

12、N/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 or by endorsement, at the latest by September 2017 and conflicting national standards

13、shall be withdrawn at the latest by September 2017. 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 identifying any or all such patent rights. This document supersedes EN ISO 68

14、03:2008. 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, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, Fr

15、ance, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 6803:2017 has been approved by CEN

16、as EN ISO 6803:2017 without any modification. BS EN ISO 6803:2017ISO 6803:2017(E)Foreword iv1 Scope . 12 Normative references 13 Terms and definitions . 14 Apparatus . 15 Test fluid 26 Test temperature 27 Test pieces . 28 Procedure. 39 Expression of results 410 Test report . 4Annex A (informative) P

17、rocedure for the optional cool down leakage test . 7Bibliography 8 ISO 2017 All rights reserved iiiContents PageBS EN ISO 6803:2017ISO 6803:2017(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of

18、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 established has the right to be represented on that committee. International organizations, governmental and non-governmental,

19、 in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/

20、IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).Attention is drawn to the possibil

21、ity 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 patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of pa

22、tent declarations received (see www .iso .org/ patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as i

23、nformation about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www .iso .org/ iso/ foreword .htmlThis document was prepared by Technical Committee ISO/TC 45, Rubber and rubber products, Subcommittee SC 1, Rubber and pl

24、astics hoses and hose assemblies.This fourth edition cancels and replaces the third edition (ISO 6803:2008), which has been technically revised to include cool down testing as specified in 4.1 and 8.2.iv ISO 2017 All rights reservedBS EN ISO 6803:2017INTERNATIONAL STANDARD ISO 6803:2017(E)Rubber or

25、plastics hoses and hose assemblies Hydraulic-pressure impulse test without flexing1 ScopeThis document describes hose impulse testing, without flexing, of rubber or plastics hydraulic hose assemblies at both high and low impulse pressures. The high-pressure testing is carried out at pressures greate

26、r than 3 MPa and the low-pressure testing at pressures from 1,5 MPa to 3 MPa. The test procedure is applicable to hydraulic hose assemblies that are subject to pulsating pressures in service which are included in the product requirements.NOTE Impulse test procedures with flexing can be found in ISO

27、6802.2 Normative referencesThe following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (inclu

28、ding any amendments) applies.ISO 3448, Industrial liquid lubricants ISO viscosity classificationISO 8330, Rubber and plastics hoses and hose assemblies VocabularyISO/TR 11340, Rubber and rubber products Hydraulic hose assemblies External leakage classification for hydraulic systems3 Terms and defini

29、tionsFor the purposes of this document, the terms and definitions given in ISO 8330 apply.ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at h t t p :/ www .electropedia .org/ ISO Online browsing platform: available at

30、h t t p :/ www .iso .org/ obp4 Apparatus4.1 Pressure-application apparatus, capable of applying an internal pulsating pressure to the test piece at a rate specified in 8.2 using a hydraulic fluid circulating through the test hose, while the fluid is maintained at the required test temperature. Each

31、pressure cycle shall be within the tolerances shown in Figure 2 (for high-pressure testing) or Figure 3 (for low-pressure testing). The nominal rate of pressure rise for high-pressure testing is given by Formula (1) in Figure 2. The rate of pressure rise for low-pressure testing shall be such that t

32、he pulse remains within the wave form envelope (see Figure 3).4.2 Graphical recorder, digital-storage facility or oscilloscope, capable of measuring the pressure cycle to ensure that the wave form is within the envelope shown in Figure 2 or Figure 3. The recorder shall have a natural frequency of mo

33、re than 250 Hz and shall be critically damped to give a response which is flat to within 5 % at up to 0,6 times the natural frequency. ISO 2017 All rights reserved 1BS EN ISO 6803:2017ISO 6803:2017(E)5 Test fluidSelect a test fluid preferably with a kinematic viscosity from 32 mm2/s to 100 mm2/s at

34、40 C (i.e. from grade ISO VG 32 to ISO VG 100 as specified in ISO 3448), and circulate it at a rate sufficient to maintain a uniform fluid temperature within the test pieces. Other fluids may be used as agreed upon between the customer and the manufacturer.6 Test temperatureThe test temperature is n

35、ormally specified in the referring hose standard. When the test temperature is not defined in the hose standard, the following temperatures are the preferred temperatures:85 C, 100 C, 120 C, 125 C, 135 C, 150 CThe test fluid shall be circulated through the test pieces at the specified or chosen temp

36、erature with a tolerance of 3 C. Cooling or heating of the test chamber shall not be permitted, except when referring standards require testing with synthetic-base fluids at a temperature higher than 150 C. When such higher temperatures are required, the test fluid need not be circulated, provided b

37、oth the fluid and the test pieces are externally heated in the test chamber at the specified temperature with a tolerance of 5 C.7 Test pieces7.1 Test pieces shall be complete hose assemblies with suitable end fittings attached. Unless otherwise specified, test four unaged hose assemblies with end f

38、ittings which have been attached for not more than 30 days. Where the referring standard requires, also test aged hose assemblies.7.2 Calculate the necessary free length of the hose in the test piece as shown in Figure 1.For values of d less than 25,4 mm, use d = 25,4 mm for the +2d term in the expr

39、ession for the hose free length, so that the hose between the fitting shell and the start of the bend radius is straight.The actual free hose length shall agree with the calculated free hose length to within 01+% or 08+mm ,whichever is greater.2 ISO 2017 All rights reservedBS EN ISO 6803:2017ISO 680

40、3:2017(E)a) Hose sizes up to and including 22 mm nominal inside diameterb) Hose sizes larger than 22 mm nominal inside diameterKeyr minimum bend radiusd hose outside diameterFigure 1 Test pieces for pressure impulse test8 Procedure8.1 Connect the test pieces to the apparatus. The test pieces shall b

41、e installed in accordance with Figure 1, i.e. test pieces of hose of nominal inside diameter up to and including 22 mm shall be bent through 180 and hoses of nominal inside diameter larger than 22 mm shall be bent through 90.8.2 Bring the test fluid to the test temperature and then apply a pulsating

42、 pressure internally to the hose assemblies at a uniform rate between 0,5 Hz and 1,3 Hz for the high-pressure test and between 0,2 Hz and 1,0 Hz for the low-pressure test. Record the pulse rate used. The pressure cycle shall fall within the shaded area of either Figure 2 or Figure 3, depending upon

43、the test pressure. Continue the test for the specified number of cycles or until an assembly fails. If a test is stopped before completion of the minimum number of cycles and then restarted, leakage may occur at the hose/fitting junction upon restarting the test and until the test temperature is rea

44、ched. Leakage less than class 4 as defined in ISO/TR 11340 does not constitute a failure of the hose assembly. Any leakage shall be reported in accordance with the classification in ISO/TR 11340.Determine the duration required for the impulse test, in total number of cycles, from the referring stand

45、ard. Where agreed samples are required, refer to the relevant hose or hose assembly standard.It is recommended that the test fluid be changed frequently to prevent breakdown.If the optional cool down leakage test for the impulse test is required in the individual product standard, then carry out the

46、 procedure as given in Annex A.This is a destructive test. Assemblies which have been subjected to this test, should therefore be discarded. ISO 2017 All rights reserved 3BS EN ISO 6803:2017ISO 6803:2017(E)9 Expression of resultsRecord the number of cycles to failure or, if failure did not occur, th

47、e number of cycles completed.NOTE The test results obtained are only valid for the combination of hose, fitting type and fitting design that was actually tested.10 Test reportThe test report shall include the following information:a) reference to this document, i.e. ISO 6803:2017;b) full description

48、 of the hose or hose assembly tested, including the fitting identification andattachment details, such as skive length and crimp diameter;c) test temperature;d) test pressure;e) test fluid;f) rate of pressure rise;g) pulse cycle rate;h) whether the test pieces were bent through 90 or through 180;i)

49、number of cycles to failure, or the number of cycles completed, for each test piece;j) position and mode of failure of each test piece, or the condition of each test piece on completion ofthe test;k) date of the test.4 ISO 2017 All rights reservedBS EN ISO 6803:2017ISO 6803:2017(E)Keyp test pressureaRate of rise to be determined between these points.bSecant pressure rise.cOne pulse cycle.d45 % to 55 % of the cycle.The secant pressure rise is the straight line drawn through two points on the pressure rise curve, one poin