BS EN ISO 1402-2009 Rubber and plastics hoses and hose assemblies - Hydrostatic testing《橡胶和塑料软管及软管组件 液压静力试验》.pdf

1、BSENISO1402:2009ICS 23.040.70NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISHSTANDARDRubberandplasticshosesandhoseassembliesHydrostatictesting(ISO1402:2009)This British Standardwas publishedunderthe authority of theStandards PolicyandStrategy Committee on 30November2009B

2、SI 2009ISBN9780580584114Amendments/corrigendaissuedsincepublicationDate CommentsBSENISO1402:2009NationalforewordThis BritishStandardisthe UK implementation of EN ISO 1402:2009.Itsupersedes BS EN ISO 1402:1997 which is withdrawn.The UK participation in its preparation was entrustedtoTechnicalCommitte

3、e PRI/66/-/4, Methods of test.Alist of organizationsrepresented on thiscommittee canbeobtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof acontract. Users areresponsible for itscorrect application.CompliancewithaBritishStandardcannotconferi

4、mmunityfromlegalobligations.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORMEN ISO 1402 October 2009 ICS 23.040.70 Supersedes EN ISO 1402:1996English Version Rubber and plastics hoses and hose assemblies - Hydrostatic testing (ISO 1402:2009) Tuyaux et flexibles en caoutchouc et en plastique - Essai

5、shydrostatiques (ISO 1402:2009) Gummi- und Kunststoffschluche und -schlauchleitungen -Hydrostatische Prfung (ISO 1402:2009) This European Standard was approved by CEN on 26 September 2009.CEN members are bound to comply with the CEN/CENELEC Internal Regulations wh ich stipulate the conditions for gi

6、ving this European Standard the status of a national standard without any alteration. Up-to-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 ver

7、sions (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.CEN members are the national standards bodies of Austria, Belgium

8、, 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, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STAND

9、ARDIZATION COMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members.Ref. No. EN ISO 1402:2009: EBS EN ISO 1402:2009EN ISO 1402:2009 (E)

10、3 Foreword This document (EN ISO 1402:2009) has been prepared by Technical Committee ISO/TC 45 “Rubber and rubber products“ in collaborationwith Technical Committee CEN/TC218 “Rubber and plastics hoses andhose assemblies”, the secretariat of which is held by BSI.This European Standard shall be given

11、 the status ofa national standard, either by publication of an identical text or by endorsement, at the latestbyApril 2010, and conflicting national standards shall be withdrawn at the latest by April 2010.Attention is drawn to the possibility that some of the elements of this document may be the su

12、bject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any orall such patent rights. This document supersedes EN ISO 1402:1996.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement th

13、is European Standard: Austria, Belgium, Bulgaria, Cyprus, CzechRepublic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, S lovakia, Slovenia, Spain, Sweden, Switzerland and the

14、UnitedKingdom. Endorsement noticeThe text of ISO 1402:2009 has been approved by CEN as a EN ISO 1402:2009 without any modification.BS EN ISO 1402:2009ISO 1402:2009(E) ISO 2009 All rights reserved iiiContents PageForeword iv1Scope12Normative references13Terms and definitions.14General .15Apparatus.16

15、Test pieces.26.1 Hose assemblies .26.2 Hoses26.3 Number of test pieces.27Application of hydrostatic pressure27.1 General .27.2 Procedure.28Hydrostatic pressure tests.38.1 Proof pressure hold test.38.2 Measurement of deformation under pressure38.3 Burst pressure test58.4 Leakage test.69Test report6BS

16、 EN ISO 1402:2009ISO 1402:2009(E)iv ISO 2009 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 co

17、mmittees. Each member body interested in a subject for which a tec hnical committee has beenestablished 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 closelywith the

18、 International 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 Internation

19、al Standardsadopted by the technical committees are ci rculated to the member bodies for voting. Public ation 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 t

20、he subject of patent rights. ISO shall not be held responsible for identifying an y or all such patent rights. ISO 1402 was prepared by Technical Committee ISO/TC 45, Rubber and rubber products, Subcommittee SC 1, Hoses (rubber and plastics). This fourth edition cancels and replaces the third editio

21、n (ISO 1402:1994), which has been technically revised. BS EN ISO 1402:2009INTERNATIONAL STANDA RD ISO 1402:2009(E) ISO 2009 All rights reserved 1Rubber and plastics hoses and hose assemblies Hydrostatic testing 1 Scope This International Standard specifies methods for the hydrostatic testing of rubb

22、er and plastics hoses andhose assemblies, including methods for the determination of dimensional stability.2 NormativereferencesThe following referenced documents are indispensable for the application of this document. For datedreferences, only the edition cited applies. For undated references, the

23、latest edition of the referenceddocument (including any amendments) applies.ISO 4671, Rubber and plastics hoses and hose assemblies Methods of measurement of the dimensions ofhoses and the lengths of hose assembliesISO 7751, Rubber and plastics hoses and hose assemblies Ratios of proof and burst pre

24、ssure to designworking pressureISO 8330, Rubber and plastics hoses and hose assemblies VocabularyISO 23529, Rubber General procedures for preparing and conditioning test pieces for physical testmethods3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 8

25、330 apply.4 General Unless otherwise specified, all tests shall be carried out at standard temperature (see ISO 23529). 5 Apparatus 5.1 Pressure source, capable of applying pressure at the rate specified in 7.2.2, up to the required testpressure. 5.2Calibrated pressure gauge or pressure transducer w

26、ith digital readout, chosen for each test sothat the test pressure is between 15 % and 85 % of the full-scale reading. In the interest of accuracy, calibrated pressure gauges or pressure transducers with digital readouts shall bechecked at frequent intervals and the fitting of restrictors is recomme

27、nded to minimize shock damage. BS EN ISO 1402:2009ISO 1402:2009(E)2 ISO 2009 All rights reserved5.3 Dimensional equipment , sliding vernier callipers or micrometer, length measuring tape, circumferentialmeasuring tape ( tape). 6 Test pieces 6.1 Hose assemblies When hose assemblies are to be tested,

28、the manufactured assembly length shall be used for the test. 6.2 Hoses The hydrostatic pressure and burst tests shall be carried out o n a hose test piece with a minimum free length,excluding end fittings and end reinforcements, of 600 mm when deformation is to be measured and 300 mmwhen it is not.

29、When a longer testlength is required for a particular hose type or size, it must be specified inthe individual hose product specification. 6.3Number oftest pieces At least two testpieces shall be tested. 7 Application of hydrostatic pressure7.1 General Water or another liquid suitable for the hose u

30、nder test shall be used as the test medium. WARNING Hoses and hose assemblies pressurized by liquids can fail in a potentially dangerous manner. For this reason, the test shall be performed in a suitable enclosure. Also, the use of air andother gases as test media shall be avoided because of the ris

31、k to o perators. In special cases, wheresuch media are required for the tests, strict safety measures are imperative. Furthermore, it is stressed that, even when a liquidis used as the test medium, it is essential that all air is expelled fromthe test piece because of the risk of injury to the opera

32、tor due to the sudden expansion of trapped airreleased when the hose bursts. 7.2 Procedure 7.2.1 Fill the test piece with test liquid, expelling all air, and connect to the testequipment. Close the valveand apply the hydrostatic pressure at a uniform rate of increase. Measure the pressure using a ca

33、librated pressure gauge or pressure transducer with digital readout (5.2).IMPORTANT It is important to allow unrestricted movement of the free or plugged end of the testpiece during the test. 7.2.2 The rate of pressure increase shall be constant and chosen to reach the final pressure after a period

34、of between 30s and 60 s for hoses with nominal inside diameters up to 50 mm. For hoses with nominal inside diameters greater than 50 mm and less than or equal to 250 mm, the time needed to reach the final pressureshall be between 60 sand 240 s. For hoses with nominal inside diameters greater than 25

35、0 mm, the timeneeded to reach the final pressure shall be decided between the manufacturer and the user. BS EN ISO 1402:2009ISO 1402:2009(E) ISO 2009 All rights reserved 38 Hydrostatic pressure tests 8.1Proof pressure hold testWhen proof pressure tests are used to determine leakage of hoses or hose

36、assemblies, apply the specified proof pressure in accordance with 7.2.2 and hold it neither for less than 30 s nor for more than 60 s, unlessotherwise specified in the product standard, examining the test pieces during this period for evidenceofleakage, cracking, abrupt distortions indicating irregu

37、larityin material or manufacture, or other signs of failure.Unless otherwise specified for the hose, the proof pressure shall be related to the maximum working pressureby the ratio given in ISO 7751. NOTE 1This text uses the term “maximum working pressure” instead of the deprecated term “design work

38、ingpressure”. NOTE 2 The test is not applicable to curved hose. 8.2Measurement of deformation under pressure8.2.1 General procedure 8.2.1.1 Setting up the test piece When tests for determining change in length, change in outside diameter and twisting and/or warping are required, straighten the hose

39、or hose assembly, lay it out horizontall y for inspection and apply a hydrostaticpressure of 0,7 bar (0,07 MPa). This isnecessary to stabilize the hose/hose assembly. Apply this pressureapproximately 5min after completion of the proof pressure test. The s upporting surface upon which the hose/hose a

40、ssembly rests shall be flat and smooth enough to allow the hose/hose assembly to expand orcontractwithout restriction. Alternatively, the hose/hose assembly may be supported on rollers, or suspendedvertically. When a section of hose is used as a testpiece, it mayalso be placed in a test rig in a ver

41、ticalposition. 8.2.1.2 Reference marks For long hoses or hose test pieces (see 6.2), while maintaining the pressure, make three reference marks(A, B and C) on the outer surface, the middle mark (B) being made approximately midway along the length of the hose, and the outer marks (A and C) 250 mm (mi

42、nimum)from B. Each mark shall consist of an arc on the circumference of the hose through which is drawn a straight line perpendicular to the arc, the three lines beingco-linear (see Figure 1). For hose assemblies, measure the distance between the contact faces of the end fittings, or place the refer

43、ence marks on the hose surface near the end of the inserted part of the fitting.8.2.1.3Measurement of initial dimensionsMaintain the initial pressure of 0,7 bar (0,07 MPa) for approximately5 min and make the appropriate measurements (see 8.2.2, 8.2.3 and 8.2.4) at the reference marks A and C with an

44、 accuracy of 1 mmusing the measuring tape (see 5.3) and record these. Also measure the externaldiameter or circumferenceaccurately. 8.2.2 Change in length at the specified test pressure NOTE The test pressure will be specified in the appropriate hoseproduct specification and could be the maximumwork

45、ing pressure (see Note 1 to 8.1), the proof pressure or any other pressure below the proof pressure at which the hosedeformation characteristics are to be measured. Raise the pressure to the test pressure specified in the hose product standard at the rate specified in 7.2.2 and maintain it for 5 min

46、 (or longer when specified in the hose product standard). At the end of this period,BS EN ISO 1402:2009ISO 1402:2009(E)4 ISO 2009 All rights reservedmeasure the length between the reference marks A and C or, in the case of hose assemblies, between the contact faces of the end fittings, with an accur

47、ac y of 1 mm, using the measuring tape (see 5.3) and recordthese values. Calculate the change in length, l , expressed as a percentage of the originallength, from the equation )( 100100 lll l=where l 0 is the distance between the reference marks A and C or the overall length (hose assemblies)measure

48、d at the initial pressure of 0,7 bar (0,07 MPa), in metres; l 1 is the distance between reference marks A and C measured at the specified tes t pressure, in metres. The percentage change inlength, l , will be positive (+ ) in the case of an increase in length and negative ( ) in the case of a decrea

49、se in length. For an illustration of the test procedure, see Figure 3. 8.2.3 Change in external diameter at the specified test pressure, measured at the approximate middle of the hose assembly 8.2.3.1 General The external diameter should preferably be determined from measurements of circumference made with anaccuracy of 1 mm using the circumferential measuring tape (see ISO4671). The measurements may,however,be made directly, using sliding vernier callipers having a minimum useful tip width of 5 mm. 8.2.3.2 Determination by measurin