BS EN ISO 2503-2009 Gas welding equipment - Pressure regulators and pressure regulators with flow-metering devices for gas cylinders used in welding cutting and allied processes up.pdf

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1、BS EN ISO2503:2009ICS 23.060.40; 25.160.30NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDGas welding equipment Pressure regulatorsand pressureregulators with flow-metering devices forgas cylinders used inwelding, cutting andallied processes up to300 bar (30 MPa

2、)Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 15/12/2009 02:16, Uncontrolled Copy, (c) BSIThis British Standard was published under the authority of the Standards Policy and Strategy Committee on 30September 2009 BSI 2009ISBN 978 0 580 60488 1Amendments/corrigenda issued since publicationD

3、ate CommentsBS EN ISO 2503:2009National forewordThis British Standard is the UK implementation of EN ISO 2503:2009. It supersedes BS EN 13918:2003 and BS EN ISO 2503:1998 which arewithdrawn.The UK participation in its preparation was entrusted to Technical Committee WEE/18, Gas welding and cutting a

4、ppliances.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immu

5、nity from legal obligations.Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 15/12/2009 02:16, Uncontrolled Copy, (c) BSIEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 2503July 2009ICS 25.160.30 Supersedes EN 13918:2003, EN ISO 2503:1998 English VersionGas welding equipment - Pressure r

6、egulators and pressureregulators with flow-metering devices for gas cylinders used inwelding, cutting and allied processes up to 300 bar (30 MPa)(ISO 2503:2009)Matriel de soudage aux gaz - Dtendeurs et dtendeursdbitmtres intgrs pour bouteilles de gaz utiliss pour lesoudage, le coupage et les techniq

7、ues connexes jusqu300 bar (30 MPa) (ISO 2503:2009)Gasschweigerte - Druckregler und Druckregler mitDurchflussmessgerten fr Gasflaschen fr Schweien,Schneiden und verwandte Prozesse bis 300 bar (30 MPa)(ISO 2503:2009)This European Standard was approved by CEN on 17 June 2009.CEN members are bound to co

8、mply 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-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Managem

9、ent 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 the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theof

10、ficial versions.CEN 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, Slo

11、venia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT 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 reservedworldwide for CEN natio

12、nal Members.Ref. No. EN ISO 2503:2009: ELicensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 15/12/2009 02:16, Uncontrolled Copy, (c) BSIBS EN ISO 2503:2009EN ISO 2503:2009 (E) 3 Foreword This document (EN ISO 2503:2009) has been prepared by Technical Committee ISO/TC 44 “Welding and allied proces

13、ses“ in collaboration with Technical Committee CEN/TC 121 “Welding” the secretariat of which is held by DIN. 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 January 2010, and conflicting national

14、standards shall be withdrawn at the latest by January 2010. Attention 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 E

15、N ISO 2503:1998, EN 13918:2003. According to the CEN/CENELEC Internal Regulations, 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, Hu

16、ngary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 2503:2009 has been approved by CEN as a EN ISO 2503:2009 without any modific

17、ation. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 15/12/2009 02:16, Uncontrolled Copy, (c) BSIBS EN ISO 2503:2009ISO 2503:2009(E) ISO 2009 All rights reserved iiiContents Page Foreword iv 1 Scope1 2 Normative references2 3 Terms and definitions .2 4 Symbols and abbreviated terms 4 5 Desi

18、gn requirements.4 5.1 Materials .4 5.2 Design and construction 4 6 Physical performance and operating characteristics7 6.1 Pressures .7 6.2 Flow rates for pressure regulators without flow-metering devices .7 6.3 Equipment classes for pressure regulators without flow-metering devices 7 6.4 Pressure-r

19、elief valve .9 6.5 Operating-temperature range.9 6.6 Performance and operating characteristics .9 7 Marking.11 7.1 Pressure regulators without flow-metering devices11 7.2 Pressure regulators with flow-metering devices .11 8 Instructions for use.12 9 Type-test procedure12 9.1 General .12 9.2 Test sam

20、ples and necessary documents .13 9.3 Test conditions13 9.4 Units13 9.5 Test for performance and operating characteristics of pressure regulators without flow-metering devices .14 9.6 Test for performance and operating characteristics of pressure regulator with flow-metering devices .17 9.7 Tests for

21、 mechanical resistance of pressure regulators or pressure regulator with a flow-metering device .19 9.8 Test for durability of markings.23 Annex A (informative) Pressure regulators24 Annex B (informative) Operating principles of pressure regulators with flow-metering devices28 Bibliography30 License

22、d Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 15/12/2009 02:16, Uncontrolled Copy, (c) BSIBS EN ISO 2503:2009ISO 2503:2009(E) iv ISO 2009 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies).

23、 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. International organizations, governmental and non-

24、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. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part

25、2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a

26、 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 responsible for identifying any or all such patent rights. ISO 2503 was prepared by Technical Committee ISO/TC 44, Welding and allied processes, Subcommi

27、ttee SC 8, Equipment for gas welding, cutting and allied processes. This third edition cancels and replaces the second edition (ISO 2503:1998), and also ISO 7292:1997, which have been technically revised. Requests for official interpretations of any aspect of this International Standard should be di

28、rected to the Secretariat of ISO/TC 44/SC 8 via your national standards body. A complete listing of these bodies can be found at www.iso.org. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 15/12/2009 02:16, Uncontrolled Copy, (c) BSIBS EN ISO 2503:2009INTERNATIONAL STANDARD ISO 2503:2009(E)

29、ISO 2009 All rights reserved 1Gas welding equipment Pressure regulators and pressure regulators with flow-metering devices for gas cylinders used in welding, cutting and allied processes up to 300 bar (30 MPa) 1 Scope This International Standard specifies requirements for single or two-stage pressur

30、e regulators without flow-metering devices for connection to gas cylinders used for compressed gases up to 300 bar 1)(30 MPa), dissolved acetylene, liquefied petroleum gases (LPG), methylacetylene-propadiene mixtures (MPS), and carbon dioxide (CO2), for use in welding, cutting and allied processes.

31、It does not cover pressure regulators having a nominal outlet pressure p2 20 bar. This International Standard also specifies requirements for single or two-stage pressure regulators with flow-metering devices for connection to gas cylinders used for compressed gases or mixtures up to 300 bar (30 MPa

32、), and carbon dioxide (CO2), for use in welding, cutting and allied processes. Typical processes using this equipment are: tungsten inert-gas arc welding (TIG), metal-arc inert-gas welding (MIG), metal-arc active-gas welding (MAG), plasma arc welding, tubular-cored-wiretubular-cored-wire welding and

33、 plasma cutting. Annex B gives examples of flow-control systems and their flow-measuring devices. This International Standard does not cover pressure regulators intended for direct use on cylinder bundles. Such regulators comply with the safety requirements of ISO 7291, in particular with the adiaba

34、tic compression test for oxygen regulators. NOTE In addition to terms used in English and French, two of the three official ISO languages (English, French and Russian), this document gives the equivalent terms in German; these are published under the responsibility of the member body for Germany (DI

35、N), and are given for information only. Only the terms and definitions given in the official languages can be considered as ISO terms and definitions. 1) 300 bar relates to the maximum cylinder filling pressure at 15 C. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 15/12/2009 02:16, Uncontr

36、olled Copy, (c) BSIBS EN ISO 2503:2009ISO 2503:2009(E) 2 ISO 2009 All rights reserved2 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 latest edition of t

37、he referenced document (including any amendments) applies. ISO 554, Standard atmospheres for conditioning and/or testing Specifications ISO 5145, Cylinder valve outlets for gases and gas mixtures Selection and dimensioning ISO 5171, Gas welding equipment Pressure gauges used in welding, cutting and

38、allied processes ISO/TR 7470, Valve outlets for gas cylinders List of provisions which are either standardized or in use ISO 9090, Gas tightness of equipment for gas welding and allied processes ISO 9539, Materials for equipment used in gas welding, cutting and allied processes ISO 15296, Gas weldin

39、g equipment Vocabulary Terms used for gas welding equipment 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 15296 and the following apply. 3.1 accuracy of a flow-metering device classification based on the permissible error of the flow indication of

40、the device 3.2 adjustable pressure regulators pressure regulator that is provided with a means of operator adjustment at the outlet pressure NOTE See A.1. 3.3 fixed orifice device, which delivers but does not indicate, a known flow when supplied with a constant upstream pressure and facing no signif

41、icant back pressure 3.4 flow gauge device which measures pressure and which is calibrated in units of flow NOTE The flow gauge does not measure flow. It indicates flow by measuring the pressure upstream of a fixed orifice. 3.5 flow meter device that measures and indicates the flow of a specific gas

42、or gas mixture 3.6 indicated flow(s) flow(s) indicated on the measuring device of a pressure regulator with a flow-metering device Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 15/12/2009 02:16, Uncontrolled Copy, (c) BSIBS EN ISO 2503:2009ISO 2503:2009(E) ISO 2009 All rights reserved 33.7

43、maximum intermediate pressure p2m for pressure regulators with flow-metering devices, maximum pressure specified by the manufacturer and measured in the intermediate pressure chamber, downstream of the pressure-regulator valve and upstream of the flow-adjusting and measuring device NOTE This maximum

44、 pressure is defined for the pressure-regulator tests, and is above the normal operating pressure of the flow meter. 3.8 nominal discharge Qn for pressure regulators with flow-metering devices, discharge specified by the manufacturer (measured downstream of the flow-adjusting and measuring devices)

45、3.9 permissible error of the flow indication difference between the indicated flow and the true flow, as a percentage of the indicated flow 3.10 preset pressure regulator pressure regulator that is not provided with a means of operator adjustment at the outlet pressure NOTE See A.2. 3.11 pressure ga

46、uge device that measures and indicates pressure 3.12 pressure regulator device for regulating a generally variable inlet pressure to an outlet pressure that is as constant as possible NOTE See A.1. 3.13 pressure regulator with flow-metering devices device for regulating a generally variable inlet ga

47、s pressure to an outlet pressure that is as constant as possible, ensuring in addition a selected gas flow NOTE 1 See A.2. NOTE 2 It is generally a pressure regulator equipped with flow-adjusting and measuring devices which are not intended to be separated from the regulating device by the operator.

48、 3.14 stability of the flow-metering device ability of a flow-metering device, when at a given flow setting, to deliver flows at any inlet pressure close to the true value of the flow delivered at the nominal pressure p1 3.15 true flow flow measured with a calibrated measuring device Licensed Copy:

49、Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 15/12/2009 02:16, Uncontrolled Copy, (c) BSIBS EN ISO 2503:2009ISO 2503:2009(E) 4 ISO 2009 All rights reserved4 Symbols and abbreviated terms The symbols used in this International Standard are given in Table 1. Table 1 Symbols and definitions Symbol Definition p1nominal inlet pressure specified by the manufacturer, see Table 3 for preferred values p2nominal outlet pressure specified by the manufacturer, see Table 3 for preferred values p2Racetylene outlet pressure used fo