1、English price group 8No 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 23.040.70!%fJ“2679639www.din.deDIN EN ISO 7751
2、Rubber and plastics hoses and hose assemblies Ratios of proof and burst pressure to maximum working pressure (ISO 7751:2016);English version EN ISO 7751:2016,English translation of DIN EN ISO 7751:2017-06Gummi und Kunststoffschluche und schlauchleitungen Verhltnisse von Prf und Berstdruck zur Ausleg
3、ung des maximalen Betriebsdruckes (ISO 7751:2016);Englische Fassung EN ISO 7751:2016,Englische bersetzung von DIN EN ISO 7751:2017-06Tuyaux et flexibles en caoutchouc et en plastique Rapports des pressions dpreuve et de rupture la pression maximale de service (ISO 7751:2016);Version anglaise EN ISO
4、7751:2016,Traduction anglaise de DIN EN ISO 7751:2017-06SupersedesDIN EN ISO 7751:201703www.beuth.deDocument comprises 11 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.June 201706.17 DIN EN ISO 7751:2017-06 2 A comma is used
5、as the decimal marker. National foreword This document (EN ISO 7751:2016) 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” (Secretariat: BSI, United Kingdom). The respo
6、nsible German body involved in its preparation was DIN-Normenausschuss Elastomer-Technik (DIN Standards Committee Elastomer Technology), Working Committee NA 045-02-12 AA “Rubber and plastics hoses and hose assemblies (Mirror Committee to CEN/TC 218; ISO/TC 45/SC 1)”. The DIN Standards corresponding
7、 to the International Standards referred to in this document are as follows: ISO 1402 DIN EN ISO 1402 ISO 8330 DIN EN ISO 8330 Amendments This standard differs from DIN EN ISO 7751:2011-12 as follows: a) the standard has been editorially and technically revised; b) the term “maximum working pressure
8、” from Amendment A1:2011 has been included in the draft; c) Clause 3 “Terms and definitions” has been included; d) Clauses 2, 4 and 5 have been revised; e) in Table 1, a new category for hoses (hoses for delivery of cement, concrete, plaster and grout) has been included; f) the note has been include
9、d that the ratios of proof pressure and minimum burst pressure in Table 1 are only meant to be a guideline if there are no specifications for these pressures in the hose product standards; g) a Bibliography has been included. Compared with DIN EN ISO 7751:2017-03, the following corrections have been
10、 made: a) in Clause 5, Table 1 (second column, line 2), the sentence Schlauch fr alle anderen Flssigkeiten, fr Feststoffe gelst in Flssigkeiten oder Luft und Wasserschlauch mit einem Betriebsdruck ber 1 MPa (10 bar) has been replaced by Schlauch fr alle anderen Flssigkeiten, fr Feststoffe gelst in F
11、lssigkeiten oder Luft und Wasserschlauch mit einem maximalen Betriebsdruck grer oder gleich 1 MPa (10 bar). In the English version, this sentence was already correct (“Hose for all other liquids, solid materials suspended in liquids or air, and water hose, maximum working pressure more than or equal
12、 to 1 MPa (10 bar)”). b) in Clause 5, Table 1 (fourth column, line 5), the value “2,0” has been replaced by “10,0”. Previous editions DIN EN ISO 7751: 1997-06, 2011-12, 2017-03 DIN EN ISO 7751:2017-06 3 National Annex NA (informative) Bibliography DIN EN ISO 1402, Rubber and plastics hoses and hose
13、assemblies Hydrostatic testing DIN EN ISO 8330, Rubber and plastics hoses and hose assemblies Vocabulary DIN EN ISO 7751:2017-06 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 7751 November 2016 ICS 23.040.70 Supersedes EN ISO 7751:1997 English Version Ru
14、bber and plastics hoses and hose assemblies Ratios of proof and burst pressure to maximum working pressure (ISO 7751:2016) Tuyaux et flexibles en caoutchouc et en plastique Rapports des pressions dpreuve et de rupture la pression maximale de service (ISO 7751:2016) Gummi- und Kunststoffschluche und
15、-schlauchleitungen Verhltnisse von Prf- und Berstdruck zum Betriebsdruck (ISO 7751:2016) This European Standard was approved by CEN on 9 October 2016. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status
16、 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 Standard exists in three official versions (English, French, Germ
17、an). 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 national standards bodies of Austria, Belgium, Bulgaria, Croatia
18、, 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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and Unit
19、ed Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN
20、ISO 7751:2016 E EN ISO 7751:2016 (E) 2 Contents Page European foreword . 3 Foreword 4 1 Scope 5 2 Normative references 5 3 Terms and definitions . 5 4 Proof pressure ratio . 5 5 Minimum burst pressure ratio . 5 Bibliography 7 DIN EN ISO 7751:2017-06 EN ISO 7751:2016 (E) 3 European foreword This docu
21、ment (EN ISO 7751:2016) 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 secretariat of which is held by BSI. This European Standard shall be given the status of a
22、national standard, either by publication of an identical text or by endorsement, at the latest by May 2017, and conflicting national standards shall be withdrawn at the latest by May 2017. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent r
23、ights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 7751:1997. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European St
24、andard: 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, Slovakia, Slovenia,
25、Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 7751:2016 has been approved by CEN as EN ISO 7751:2016 without any modification. DIN EN ISO 7751:2017-06 ForewordISO (the International Organization for Standardization) is a worldwide federation of nationa
26、l 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 technical committee has been established has the right to be represented on that committee. Internation
27、al 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 matters of electrotechnical standardization.The procedures used to develop this document and those intended f
28、or its further maintenance are described in the ISO/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.o
29、rg/directives).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 responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be
30、 in the Introduction and/or on the ISO list of patent 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
31、related to conformity assessment, as well as information 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.html.The committee responsible for this document is ISO/TC 45, Rubber and rubber pro
32、ducts, Subcommittee SC 1, Rubber and plastics hoses and hose assemblies.This third edition cancels and replaces the second edition (ISO 7751:1991), which has been technically revised. It also incorporates the Amendment ISO 7751:1991/Amd.1:2011.The main changes are as follows: the term “design workin
33、g pressure” has been replaced by “maximum working pressure” throughout the text in accordance with ISO 7751:1991/Amd.1:2011; a new category (hoses for delivery of cement, concrete, plaster and grout) has been added.EN ISO 7751:2016 (E) 4 DIN EN ISO 7751:2017-06 1 ScopeThis document specifies ratios
34、of proof pressure and minimum burst pressure to maximum working pressure for various categories of hose service.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, o
35、nly the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 1402, Rubber and plastics hoses and hose assemblies Hydrostatic testing3 Terms and definitionsFor the purposes of this document, the terms and definitions given
36、 in ISO 8330 apply.ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at http:/www.electropedia.org/ ISO Online browsing platform: available at http:/www.iso.org/obp4 Proof pressure ratioThe methods and procedures to perfo
37、rm the proof tests are specified in ISO 1402.The ratio of proof pressure to maximum working pressure shall, unless otherwise specified, in the relevant hose/hose assembly product standard, be in accordance with Table 1, which states the pressures for guidance only. When the hose product standard spe
38、cifies different pressures, these pressures shall be used when testing the hoses.5 Minimum burst pressure ratioThe methods and procedures to perform the burst tests are specified in ISO 1402.The ratio of minimum burst pressure to maximum working pressure shall, unless otherwise specified, in the rel
39、evant hose/hose assembly product standard, be in accordance with Table 1.EN ISO 7751:2016 (E) 5 DIN EN ISO 7751:2017-06 Table 1 Ratios of proof and minimum burst pressure to maximum working pressureNo.Type of service (for guidance only)Ratio of proof pressure to maximum working pres-sureRatio of min
40、imum burst pressure to maximum working pressure1Water hose, maximum working pressure 1 MPa (10 bar)1,5 3,02Hose for all other liquids, solid materials suspended in liquids or air, and water hose, maximum working pressure more than or equal to 1 MPa (10 bar)2,0 4,03 Hose for compressed air and other
41、gases 2,0 4,04Hose for liquid media that change into the gaseous state when subjected to a reduction in pressure, i.e. released to atmosphere2,5 5,05 Steam hose 5,0 10,06 Jetting hose 1,5 2,57Hoses for the delivery of cement, concrete, plaster and grout1,5 2,0NOTE The ratios of proof and minimum bur
42、st pressures stated in Table 1 are intended to be used for guidance only, when the hose product standard concerned does not specify these pressures for the various types and classes of hoses and hose assemblies covered by that standard.EN ISO 7751:2016 (E) 6 DIN EN ISO 7751:2017-06 BibliographyISO 8330, Rubber and plastics hoses and hose assemblies VocabularyEN ISO 7751:2016 (E) 7 DIN EN ISO 7751:2017-06
