1、April 2010 Translation by DIN-Sprachendienst.English price group 10No 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、23.040.70!$aU9“1625022www.din.deDDIN EN ISO 4023Rubber hoses and hose assemblies for steam Test methods (ISO 4023:2009)English translation of DIN EN ISO 4023:2010-04Gummischluche und Schlauchleitungen fr Dampf Prfverfahren (ISO 4023:2009)Englische bersetzung von DIN EN ISO 4023:2010-04Tuyaux et flex
3、ibles en caoutchouc pour la vapeur Mthodes dessai (ISO 4023:2009)Traduction anglaise de DIN EN ISO 4023:2010-04SupersedesDIN EN ISO 4023:1995-04www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 16 pages04.10 DIN EN ISO 4023:2010-04 2 A co
4、mma is used as the decimal marker. National foreword The responsible German body involved 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 refe
5、rred to in clause 2 of this document is as follows: ISO 6134 DIN EN ISO 6134 Amendments This standard differs from DIN EN ISO 4023:1995-04 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) The
6、 standard has been extended to include hose assemblies. d) End connections and couplings have been specified. Previous editions DIN EN ISO 4023: 1995-04 National Annex NA (informative) Bibliography DIN EN ISO 6134, Rubber hoses and hose assemblies for saturated steam Specification This document has
7、been prepared by Technical Committee ISO/TC 45 “Rubber and rubber products”, (Secretariat: DSM, Malaysia), Subcommittee SC 1 “Hoses (rubber and plastics)” (Secretariat: DSM, Malaysia), and has been adopted as EN ISO 4023:2009 by Technical Committee CEN/TC 218 “Rubber and plastics hoses and hose asse
8、mblies” (Secretariat: BSI, United Kingdom). 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 - Test methods (ISO 4023:2009) Tuyaux et flexibles en caoutchouc pour la vapeur
9、- Mthodes dessai (ISO 4023:2009) 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 Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard wit
10、hout 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 member. This European Standard exists in three official versions (English, French, German). A version in any other languag
11、e 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, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
12、 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 STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMIT
13、EE 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. Ref. No. EN ISO 4023:2009: EGummischluche und Schlauchleitungen fr Dampf - Contents DIN EN ISO 4023:2010-04 EN ISO 4023:200
14、9 (E) 2 Page Foreword3 1 Scope 4 2 Normative references 4 3 Method A: Vertical rack method.4 3.1 Principle4 3.2 Apparatus .5 3.3 Test piece .5 3.4 Procedure .5 3.5 Test report 7 4 Method B: Horizontal rack method 7 4.1 Principle7 4.2 Apparatus .7 4.3 Test piece .8 4.4 Procedure .8 4.5 Test report 9
15、5 Method C: Flexing test, vertical arrangement.9 5.1 Principle9 5.2 Apparatus .9 5.3 Test piece .9 5.4 Procedure 10 5.5 Test report . 11 6 Method D: Flexing test, horizontal arrangement. 11 6.1 Principle. 11 6.2 Apparatus 12 6.3 Test piece 12 6.4 Procedure 12 6.5 Test report . 14 Foreword hose assem
16、blies” 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 May 2010, and conflicting national standards shall be withdrawn at the latest by May 2010. Attention
17、 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 4023:1995. According to the CEN/CENELEC Internal Regulations, t
18、he 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, Netherlands, N
19、orway, Poland, 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. DIN EN ISO 4023:2010-04 EN ISO 4023:2009 (E) 3 This document (EN ISO 4023:200
20、9) 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 WARNING Persons using this International Standard should be familiar with normal laboratory practice. This standard does not purport
21、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 regulatory conditions. All necessary safety devices shall be provided to ensure safe working co
22、nditions 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. Four methods are specified, namely: method A: vertical rack method; method B: horizontal rack m
23、ethod; 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 document. For dated references, only the edition cited applies. For undated references, the lat
24、est 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 length of hose or hose assembly is held in a fixed vertical position and saturated steam is passed
25、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, physical properties are to be used to check for hose deterioration as well as the permitted ch
26、anges 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 may also be specified, for example rupture of reinforcement, cracking of cover to a specified
27、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 addition, it is recorded in the test report whether there is any failure or leakage at the en
28、d-fitting-to-hose interface. DIN EN ISO 4023:2010-04 EN ISO 4023:2009 (E) 4 3.2 Apparatus Refer to Figure 1. Two fixed horizontal steam manifolds having suitable connections for attaching test pieces are placed one above the other at such a distance that the test pieces will just fit between the con
29、nections 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 pressure-regulating valve, a recording gauge and one or more suitable indicating gauges. The lower manifold is connecte
30、d 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 designed so that the ambient temperature measured 25 mm from the outer surface of the hose is not more than 11 C above
31、 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 steam test and recoupling the hose with an appropriate coupling for a burst test. 3.3.2 Hose assemblies The test piec
32、e 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 subject it to the internal steam conditions specified in ISO 6134 for the particular type of hose under test. Af
33、ter 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 it under atmospheric conditions for not less than 16 h and not more than 100 h. After this time, examine the tes
34、t 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 the case of hose assemblies, if a burst test is specified in the relevant product standard the complete hose ass
35、embly 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 criteria, and the time to failure noted. These specified criteria will be stated in the relevant hose product standar
36、d. 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 explicitly forbids it. Once the end fittings have been tightened and leakage has been stopped as a result of this a
37、ction, 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. DIN EN ISO 4023:2010-04 EN ISO 4023:2009 (E) 5 Dimensions in millimetres Key 1 steam inlet manifold 2 recording and
38、 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 steam trap. Figure 1 Schematic diagram of arrangement for vertical steam rack test (method A) DIN EN ISO 4023:2010-04 EN ISO 4023:2009 (
39、E) 6 3.5 Test report The test report shall include the following particulars: a) a full description of the hose or hose assembly (including end fittings) 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
40、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 specified in the relevant specification; f) if testing was continued until the test piece failed, the time to failure; g) any other expression of results r
41、equired by the relevant specification; h) any special observations. 4 Method B: Horizontal rack method 4.1 Principle A length of hose or a hose assembly fitted with the recommended or specified end fittings is held in a horizontal position in such a manner that it sags, enabling condensate to collec
42、t 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 extent to which changes in appearance and physical properties as a result of exposure are permitted will normally be stated in the relevant hose specific
43、ation (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.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 recor
44、ded 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 horizontal steam manifolds having suitable connections for attaching test pieces are placed parallel to each other and in the same horizontal plane approxim
45、ately 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 pressure-regulating valve, a recording gauge and a suitable indicating gauge. The other manifold is connected to a steam trap. Shut-off valves are prov
46、ided 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. DIN EN ISO 4023:2010-
47、04 EN ISO 4023:2009 (E) 7 Dimensions in millimetres Key 1 hose or hose assembly under test 2 suitable end fittings with couplings 3 manifold Figure 2 Schematic diagram of arrangement for horizontal steam rack test (method B) 4.3 Test piece The test piece shall be a sample of hose or a hose assembly
48、fitted with the recommended or specified end fittings and of suitable length to conform to Figure 2. 4.4 Procedure Mount the test piece in the apparatus so that there is a sag in the hose of 100 mm to 400 mm below the level of the hose at the manifolds. Subject the hose to the internal steam conditi
49、ons specified in ISO 6134 for the particular type of hose under test. After 20 h, exhaust the hose within a time of 1 min or less and allow the hose to cool to room temperature for 4 h. Repeat this cycle for the length of time specified in ISO 6134 for the particular type of hose under test. After exposure for the specified time, release the pressure in the test piece, remove it from the apparatus, allow it to cool and hold it under atmospheric conditions for not less than 16 h and not more than 100 h. After this time, examine the test piece visua
