EN ISO 4023-2009 en Rubber hoses and hose assemblies for steam - Test methods《蒸汽用橡胶软管和软管组件的试验方法》.pdf

1、BS EN ISO4023:2009ICS 23.040.70NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDRubber hoses and hoseassemblies for steam Test methods (ISO4023:2009)This British Standardwas published under theauthority of the StandardsPolicy and StrategyCommittee on 30 June2010

2、BSI 2010ISBN 978 0 580 61718 8Amendments/corrigenda issued since publicationDate CommentsBS EN ISO 4023:2009National forewordThis British Standard is the UK implementation of EN ISO 4023:2009. Itsupersedes BS EN ISO 4023:1995 which is withdrawn.The UK participation in its preparation was entrusted t

3、o TechnicalCommittee PRI/66/-/4, Rubber and plastics tubing, hoses and hoseassemblies - Methods of test.A list of organizations 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 r

4、esponsible for its correct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 4023 November 2009 ICS 23.040.70 Supersedes EN ISO 4023:1995English Version Rubber hoses and hose assemblies for steam - Tes

5、t methods (ISO 4023:2009) Tuyaux et flexibles en caoutchouc pour la vapeur - Mthodes dessai (ISO 4023:2009) Gummischluche und -schlauchleitungen fr Dampf - Prfverfahren (ISO 4023:2009) This European Standard was approved by CEN on 7 October 2009. CEN members are bound to comply with the CEN/CENELEC

6、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 any CEN

7、 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. CEN

8、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, Swed

9、en, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management 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.

10、Ref. No. EN ISO 4023:2009: EBS EN ISO 4023:2009EN ISO 4023:2009 (E) 3 Foreword This document (EN ISO 4023:2009) 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 assemblies” the sec

11、retariat 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 May 2010, and conflicting national standards shall be withdrawn at the latest by May 2010. Attention is drawn to t

12、he 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 4023:1995. According to the CEN/CENELEC Internal Regulations, the national st

13、andards 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, Netherlands, Norway, Poland,

14、 Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 4023:2009 has been approved by CEN as a EN ISO 4023:2009 without any modification. BS EN ISO 4023:2009ISO 4023:2009(E) ISO 2009 All rights reserved iiiContents Page Foreword

15、iv 1 Scope1 2 Normative references1 3 Method A: Vertical rack method 1 3.1 Principle1 3.2 Apparatus.2 3.3 Test piece .2 3.4 Procedure.2 3.5 Test report4 4 Method B: Horizontal rack method4 4.1 Principle4 4.2 Apparatus.4 4.3 Test piece .5 4.4 Procedure.5 4.5 Test report6 5 Method C: Flexing test, ver

16、tical arrangement 6 5.1 Principle6 5.2 Apparatus.6 5.3 Test piece .6 5.4 Procedure.7 5.5 Test report8 6 Method D: Flexing test, horizontal arrangement8 6.1 Principle8 6.2 Apparatus.9 6.3 Test piece .9 6.4 Procedure.9 6.5 Test report11 BS EN ISO 4023:2009ISO 4023:2009(E) iv ISO 2009 All rights reserv

17、edForeword 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 member body interested in a subject for which a

18、 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 International Electrotechnical Commission (IEC) on all matte

19、rs 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 adopted by the technical committees are circula

20、ted 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 patent rights. ISO shall not be held responsibl

21、e for identifying any or all such patent rights. ISO 4023 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 edition (ISO 4023:1991), which has been technically revised. The maj

22、or technical change is the broadening of the scope to include hose assemblies. These have to be fitted with suitable end connections and couplings as, for a particular hose design, the type of end connection used can have a significant influence on the test results. A procedure for dealing with any

23、initial leakage between hose body and end fitting which sometimes occurs at the start of the test is also included. BS EN ISO 4023:2009INTERNATIONAL STANDARD ISO 4023:2009(E) ISO 2009 All rights reserved 1Rubber hoses and hose assemblies for steam Test methods WARNING Persons using this Internationa

24、l Standard should be familiar with normal laboratory practice. This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user to establish appropriate health and safety practices and to ensure compliance with any national r

25、egulatory conditions. All necessary safety devices shall be provided to ensure safe working conditions for the operators. 1 Scope This International Standard specifies test methods in which a rubber hose test piece or hose assembly is exposed to saturated steam, thus simulating service conditions. F

26、our methods are specified, namely: method A: vertical rack method; method B: horizontal rack method; method C: flexing test, vertical arrangement; method D: flexing test, horizontal arrangement. 2 Normative references The following referenced documents are indispensable for the application of this d

27、ocument. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 6134, Rubber hoses and hose assemblies for saturated steam Specification 3 Method A: Vertical rack method 3.1 Principle A lengt

28、h of hose or hose assembly is held in a fixed vertical position and saturated steam is passed through it. NOTE The temperature or pressure of the steam and the time of exposure are given in ISO 6134 for each particular hose type. The relevant hose product standard will normally state which, if any,

29、physical properties are to be used to check for hose deterioration as well as the permitted changes in these properties. Properties commonly specified are bursting strength, tensile strength, elongation at break of the lining and/or cover and adhesion between layers. Visually assessed test criteria

30、may also be specified, for example rupture of reinforcement, cracking of cover to a specified depth and pitting or blistering of the lining. Sometimes, the time of exposure until the hose fails may be specified as the test criterion. For hose assemblies, the check is carried out as for hoses but, in

31、 addition, it is recorded in the test report whether there is any failure or leakage at the end-fitting-to-hose interface. BS EN ISO 4023:2009ISO 4023:2009(E) 2 ISO 2009 All rights reserved3.2 Apparatus Refer to Figure 1. Two fixed horizontal steam manifolds having suitable connections for attaching

32、 test pieces are placed one above the other at such a distance that the test pieces will just fit between the connections in a vertical position without distortion. Dry saturated steam at the required pressure is supplied to the test pieces through the upper manifold, which is equipped with a pressu

33、re-regulating valve, a recording gauge and one or more suitable indicating gauges. The lower manifold is connected to a steam trap. Shut-off valves are provided at each opening in each manifold. Should the apparatus be confined within an enclosure as a safety precaution, the enclosure shall be desig

34、ned so that the ambient temperature measured 25 mm from the outer surface of the hose is not more than 11 C above room temperature. 3.3 Test piece 3.3.1 Hoses The test piece shall be a sample of hose, not less than 500 mm in length, and of a length sufficient to allow coupling removal after the stea

35、m test and recoupling the hose with an appropriate coupling for a burst test. 3.3.2 Hose assemblies The test piece for the hose assembly shall be not less than 500 mm in length and shall be fitted with the recommended or specified end fittings. 3.4 Procedure Mount the test piece in the apparatus and

36、 subject it to the internal steam conditions specified in ISO 6134 for the particular type of hose under test. After exposure for the time specified in ISO 6134 for the particular type of hose under test, release the pressure in the test piece, remove it from the apparatus, allow it to cool and hold

37、 it under atmospheric conditions for not less than 16 h and not more than 100 h. After this time, examine the test piece visually and carry out the physical determinations specified; at the same time, determine the same properties on a length of hose or a hose assembly which has not been exposed. In

38、 the case of hose assemblies, if a burst test is specified in the relevant product standard the complete hose assembly shall be removed from the apparatus to carry out the test. If so specified, the exposure shall be continued until the hose or hose assembly fails, as indicated by the specified crit

39、eria, and the time to failure noted. These specified criteria will be stated in the relevant hose product standard. Normally, at the start of the test, tightening of the hose end fittings to stop initial slight leakage between end fitting and hose body is allowed, unless the hose product standard ex

40、plicitly forbids it. Once the end fittings have been tightened and leakage has been stopped as a result of this action, however, further tightening necessary to stop any subsequent leakage is not allowed and the hose assembly will be considered to have failed the test if such leakage takes place. BS

41、 EN ISO 4023:2009ISO 4023:2009(E) ISO 2009 All rights reserved 3Dimensions in millimetres Key 1 steam inlet manifold 2 recording and indicating gauges 3 pressure-regulating valve 4 suitable end fittings with couplings 5 steam hose or hose assembly under test 6 manifold aTo open/close valve. bTo stea

42、m trap. Figure 1 Schematic diagram of arrangement for vertical steam rack test (method A) BS EN ISO 4023:2009ISO 4023:2009(E) 4 ISO 2009 All rights reserved3.5 Test report The test report shall include the following particulars: a) a full description of the hose or hose assembly (including end fitti

43、ngs) tested; b) a reference to this test method, i.e. ISO 4023:2009, method A; c) a reference to the relevant specification in which the test criteria are given or details of such criteria; d) details of the visual assessment of the test piece after testing; e) the results of the physical tests spec

44、ified in the relevant specification; f) if testing was continued until the test piece failed, the time to failure; g) any other expression of results required by the relevant specification; h) any special observations. 4 Method B: Horizontal rack method 4.1 Principle A length of hose or a hose assem

45、bly fitted with the recommended or specified end fittings is held in a horizontal position in such a manner that it sags, enabling condensate to collect in part of it. NOTE 1 The temperature or pressure of the steam and the time of exposure are given in ISO 6134 for each particular hose type. The ex

46、tent to which changes in appearance and physical properties as a result of exposure are permitted will normally be stated in the relevant hose specification (see also the note in 3.1). NOTE 2 This test is usually used to measure the tendency for the lining to blister or “chunk” out (“popcorning”), i

47、.e. for portions of the lining to fracture and become detached. For hose assemblies, the test is carried out as for hoses but, in addition, it is recorded in the test report whether there is any failure or leakage at the end-fitting-to-hose interface. 4.2 Apparatus Refer to Figure 2. Two fixed horiz

48、ontal steam manifolds having suitable connections for attaching test pieces are placed parallel to each other and in the same horizontal plane approximately 1 m from each other. Dry saturated steam at the required pressure is supplied to the test piece through one manifold, which is equipped with a

49、pressure-regulating valve, a recording gauge and a suitable indicating gauge. The other manifold is connected to a steam trap. Shut-off valves are provided at each opening in each manifold. Should the apparatus be confined within an enclosure as a safety precaution, the enclosure shall be so designed that the ambient temperature measured 25 mm from the outer surface of the hose is not greater than 11 C above room temperature. BS EN ISO 4023:2009ISO 4023:2009(E) ISO 2009 All rights reserved 5Dimensions in millimetres Key 1 hose or ho