1、BS EN ISO6803:2008ICS 23.040.70NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDRubber or plasticshoses and hoseassemblies Hydraulic-pressureimpulse test withoutflexing (ISO 6803:2008)Copyright European Committee for Standardization Provided by IHS under license
2、with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-This British Standardwas published under theauthority of the StandardsPolicy and StrategyCommittee on 31 March2009 BSI 2009ISBN 978 0 580 57030 8Amendments/corrigenda issued since publicationDate CommentsBS EN
3、 ISO 6803:2008National forewordThis British Standard is the UK implementation of EN ISO 6803:2008. Itsupersedes BS EN ISO 6803:1997 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee PRI/66, Rubber and plastics tubing, hoses and hoseassemblies.A list of or
4、ganizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunityfrom legal obligatio
5、ns.Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 6803August 2008ICS 23.040.70 Supersedes EN ISO 6803:1997 English VersionR
6、ubber or plastics hoses and hose assemblies - Hydraulic-pressure impulse test without flexing (ISO 6803:2008)Tuyaux et flexibles en caoutchouc ou en plastique - Essaidimpulsions de pression hydraulique sans flexion (ISO6803:2008)Gummi- und Kunststoffschluche und -schlauchleitungen -Hydraulik-Druck-I
7、mpulsprfung ohne Biegung (ISO6803:2008)This European Standard was approved by CEN on 9 August 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
8、-date lists and bibliographical references concerning such nationalstandards 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 t
9、he responsibility of a CEN member into its own language and notified 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, Hungar
10、y, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue
11、de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 6803:2008: ECopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking p
12、ermitted without license from IHS-,-,-BS EN ISO 6803:2008EN ISO 6803:2008 (E) 3 Foreword This document (EN ISO 6803:2008) has been prepared by Technical Committee ISO/TC 45 “Rubber and rubber products“ in collaboration with Technical Committee CEN/TC 218 “Rubber and plastics hoses and hose assemblie
13、s” 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 February 2009, and conflicting national standards shall be withdrawn at the latest by February 2009. Att
14、ention 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 6803:1997. According to the CEN/CENELEC Internal Regulati
15、ons, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherla
16、nds, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 6803:2008 has been approved by CEN as a EN ISO 6803:2008 without any modification. Copyright European Committee for Standardization Provided by IHS under
17、license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 6803:2008ISO 6803:2008(E) ISO 2008 All rights reserved iiiContents Page1 Scope 12 Normative references 13 Terms and definitions 14 Apparatus . 15 Test fluid . 16 Test temperature 27 Test piec
18、es . 28 Procedure . 39 Expression of results 310 Test report 5Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 6803:2008ISO 6803:2008(E)iv ISO 2008 All rights reservedFo
19、rewordISO (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 ISOtechnical committees. Each member body interested in a subject for which a techni
20、cal committee has beenestablished has the right to be represented on that committee. International organizations, governmental andnon-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the InternationalElectrotechnical Commission (IEC) on all matters of elec
21、trotechnical 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 Standardsadopted by the technical committees are circulated to the me
22、mber bodies for voting. Publication as anInternational 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 patentrights. ISO shall not be held responsible for identifyin
23、g any or all such patent rights.ISO 6803 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 6803:1994), which has been technically revisedto include low-pressure impu
24、lse testing. The standard thus now covers high-pressure testing at pressuresgreater than 3 MPa and low-pressure testing at pressures from 1,5 MPa to 3 MPa.Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted with
25、out license from IHS-,-,-BS EN ISO 6803:2008INTERNATIONAL STANDARD ISO 6803:2008(E) ISO 2008 All rights reserved 1Rubber or plastics hoses and hose assemblies Hydraulic-pressure impulse test without flexing1ScopeThis International Standard describes hose impulse testing, without flexing, of rubber o
26、r plastics hydraulic hoseassemblies at both high and low impulse pressures. The high-pressure testing is carried out at pressuresgreater than and the low-pressure testing at pressures from to . The test procedure isapplicable to hydraulic hose assemblies that are subject to pulsating pressures in se
27、rvice which are included inthe product requirements.NOTE Impulse test procedures with flexing can be found in ISO 6802, Rubber and plastics hoses and hose assemblieswith wire reinforcements Hydraulic impulse test with flexing.2 Normative referencesThe following referenced documents are indispensable
28、 for the application of this document. For datedreferences, only the edition cited applies. For undated references, the latest edition of the referenced document(including any amendments) applies.ISO 3448, Industrial liquid lubricants ISO viscosity classificationISO 8330, Rubber and plastics hoses a
29、nd hose assemblies VocabularyISO/TR 11340, Rubber and rubber products Hydraulic hose assemblies External leakage classificationfor hydraulic systems3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 8330 apply.4 Apparatus4.1 Pressure-application apparatu
30、s, capable of applying an internal pulsating pressure to the test piece ata rate of using a hydraulic fluid circulating through the test hose, while the fluid is maintained atthe required test temperature. Each pressure cycle shall be within the tolerances shown in Figure 2 (for high-pressure testin
31、g) or Figure 3 (for low-pressure testing). The nominal rate of pressure rise for high-pressuretesting is given by Equation (1) in Figure 2. The rate of pressure rise for low-pressure testing shall be such thatthe pulse remains within the wave form envelope (see Figure 3).4.2 Graphical recorder, digi
32、tal-storage facility or oscilloscope, capable of measuring the pressure cycleto ensure that the wave form is within the envelope shown in Figure 2 or Figure 3. The recorder shall have anatural frequency of more than and shall be critically damped to give a response which is flat to withinat up to 0,
33、6 times the natural frequency.5Test fluidSelect a test fluid preferably with a kinematic viscosity from to at (i.e. from gradeISO VG 32 to ISO VG 100 as specified in ISO 3448), and circulate it at a rate sufficient to maintain a uniform3 MPa 1,5 MPa 3 MPa1Hz 0,25 Hz250 Hz5%32 mm2/s 100 mm2/s 40CCopy
34、right European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 6803:2008ISO 6803:2008(E)2 ISO 2008 All rights reservedfluid temperature within the test pieces. Other fluids may be used as
35、 agreed upon between the customer andthe manufacturer.6 Test temperatureThe test temperature is normally specified in the referring hose standard. When the test temperature is notdefined in the hose standard, the following temperatures are the preferred temperatures:, , , , , The test fluid shall be
36、 circulated through the test pieces at the specified or chosen temperature with a toleranceof . Cooling or heating of the test chamber shall not be permitted, except when referring standardsrequire testing with synthetic-base test fluids at a temperature higher than . When such highertemperatures ar
37、e required, the test fluid need not be circulated, provided both the fluid and the test pieces areexternally heated in the test chamber at the specified temperature with a tolerance of .7 Test pieces7.1 Test pieces shall be complete hose assemblies with suitable end fittings attached. Unless otherwi
38、sespecified, test four unaged hose assemblies with end fittings which have been attached for not more than30 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 less than
39、, use for the term in the expression for the hose freelength, 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 or , whicheveris greater.a) Hose sizes up to and includingnomin
40、al inside diameterb) Hose sizes larger thannominal inside diameterKeyminimum bend radiushose outside diameterFigure 1 Test pieces for pressure impulse test85C 100C 120C 125C 135C 150C3C150C5Cd 25,4 mm d = 25,4 mm +2d+10%+80mm22 mm 22 mmrdCopyright European Committee for Standardization Provided by I
41、HS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 6803:2008ISO 6803:2008(E) ISO 2008 All rights reserved 38 Procedure8.1 Connect the test pieces to the apparatus. The test pieces shall be installed in accordance with Figure 1,i.e. t
42、est pieces of hose of nominal inside diameter up to and including shall be bent through andhoses of nominal inside diameter larger than shall be bent through .8.2 Bring the test fluid to the test temperature and then apply a pulsating pressure internally to the hoseassemblies at a uniform rate betwe
43、en and for the high-pressure test and between andfor the low-pressure test. Record the pulse rate used. The pressure cycle shall fall within the shadedarea of either Figure 2 or Figure 3, depending upon the test pressure. Continue the test for the specified numberof cycles or until an assembly fails
44、. If a test is stopped before completion of the minimum number of cycles andthen restarted, leakage may occur at the hose/fitting junction upon restarting the test and until the testtemperature is reached. Leakage less than class 4 as defined in ISO/TR 11340 does not constitute a failure ofthe hose
45、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 standard.Where agreed samples are required, refer to the relevant hose or hose assembly standard.It is rec
46、ommended that the test fluid be changed frequently to prevent breakdown.NOTE This is a destructive test. Assemblies which have been subjected to this test, should therefore be discarded.9 Expression of resultsRecord the number of cycles to failure or, if failure did not occur, the number of cycles c
47、ompleted.NOTE The test results obtained are only valid for the combination of hose, fitting type and fitting design that was actuallytested.22 mm 18022 mm 900,5 Hz 1,3 Hz 0,2 Hz1,0 HzCopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction
48、or networking permitted without license from IHS-,-,-BS EN ISO 6803:2008ISO 6803:2008(E)4 ISO 2008 All rights reservedKeytest pressureaRate of rise to be determined between these points.bSecant pressure rise.cOne pulse cycle.dto of the cycle.The secant pressure rise is the straight line drawn through two points on the pressure rise curve, one point atof the test pressure and the other at of the test pressure.Point 0 is the intersection of the secant pressure rise with 0 pressure.The rate of pressure rise is the slope of the secant pressure rise, expressed in
