BS EN ISO 5171-2010 Gas welding equipment - Pressure gauges used in welding cutting and allied processes《气体焊接设备 焊接，切割和相关工艺过程中使用的压力仪表》.pdf

1、BS EN ISO5171:2010ICS 17.100; 25.160.30NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDGas welding equipment Pressure gaugesused in welding,cutting and alliedprocesses (ISO5171:2009)This British Standardwas published under theauthority of the StandardsPolicy and

2、 StrategyCommittee on 30 April2010 BSI 2010ISBN 978 0 580 68919 2Amendments/corrigenda issued since publicationDate CommentsBS EN ISO 5171:2010National forewordThis British Standard is the UK implementation of EN ISO 5171:2010.It is identical to ISO 5171:2009. It supersedes BS EN 562:2003 which iswi

3、thdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee WEE/18, Gas welding and cutting appliances.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

4、a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 5171 March 2010 ICS 17.100; 25.160.30 Supersedes EN 562:2003English Version Gas welding equipment - P

5、ressure gauges used in welding, cutting and allied processes (ISO 5171:2009) Matriel de soudage au gaz - Manomtres utiliss pour le soudage, le coupage et les techniques connexes (ISO 5171:2009) Gasschweigerte - Manometer fr Schweien, Schneiden und verwandte Prozesse (ISO 5171:2009) This European Sta

6、ndard was approved by CEN on 21 February 2010. 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 without any alteration. Up-to-date lists and bibliographical references concerni

7、ng 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 language made by translation under the responsibility of a CEN member into its own l

8、anguage 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, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

9、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 KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2

10、010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 5171:2010: EBS EN ISO 5171:2010EN ISO 5171:2010 (E) 3 Foreword The text of ISO 5171:2009 has been prepared by Technical Committee ISO/TC 44 “Welding and allied processes” of t

11、he International Organization for Standardization (ISO) and has been taken over as EN ISO 5171:2010 by 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

12、 or by endorsement, at the latest by September 2010, and conflicting national standards shall be withdrawn at the latest by September 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 respo

13、nsible for identifying any or all such patent rights. This document supersedes EN 562:2003. 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, Croatia, Cyprus, C

14、zech 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 the United Kingdom. Endorsement notice The text of ISO 5171:20

15、09 has been approved by CEN as a EN ISO 5171:2010 without any modification. BS EN ISO 5171:2010ISO 5171:2009(E) ISO 2009 All rights reserved iiiContents Page Foreword iv 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 1 4 Pressure. 2 4.1 Unit of pressure 2 4.2 Maximum scale reading .

16、 2 4.3 Maximum pressure mark . 2 5 Manufacturing requirements . 3 5.1 Materials 3 5.2 Design and dimensions 3 6 Safety . 8 7 Marking 8 8 Tests. 8 8.1 General. 8 8.2 Design and manufacturing standard 9 8.3 Accuracy 9 8.4 Torsion test . 10 8.5 Bend test 10 8.6 Case vent test 11 8.7 Overpressure test .

17、 12 8.8 Flammability test. 12 Bibliography . 13 BS EN ISO 5171:2010ISO 5171:2009(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 Standar

18、ds 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-governmental, in liaison with ISO, also take

19、 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 2. The main task of technical committees is

20、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 vote. Attention is drawn to the possibility

21、 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 5171 was prepared by Technical Committee ISO/TC 44, Welding and allied processes, Subcommittee SC 8, Equipment for gas welding, cuttin

22、g and allied processes. This third edition cancels and replaces the second edition (ISO 5171:1995), which has been technically revised. Requests for official interpretations of any aspect of this International Standard should be directed to the Secretariat of ISO/TC 44/SC 8 via your national standar

23、ds body. A complete listing of these bodies can be found at http:/www.iso.org/. BS EN ISO 5171:2010INTERNATIONAL STANDARD ISO 5171:2009(E) ISO 2009 All rights reserved 1Gas welding equipment Pressure gauges used in welding, cutting and allied processes 1 Scope This International Standard specifies r

24、equirements for Bourdon-tube pressure gauges normally used with compressed gas systems at pressures up to 30 MPa (300 bar) in welding, cutting and allied processes. It also covers use for dissolved acetylene and for liquefied gases under pressure. It does not cover gauges for acetylene in acetylene-

25、manufacturing plants. 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 latest edition of the referenced document (including any amendments) applies. ISO

26、7-1, Pipe threads where pressure-tight joints are made on the threads Part 1: Dimensions, tolerances and designation ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads Part 1: Dimensions, tolerances and designation ISO 497, Guide to the choice of series of preferred numb

27、ers and of series containing more rounded values of preferred numbers ISO 4589-2:1996, Plastics Determination of burning behaviour by oxygen index Part 2: Ambient-temperature test ISO 9539, Materials for equipment used in gas welding, cutting and allied processes ISO 10102, Assembly tools for screws

28、 and nuts Double-headed open-ended engineers wrenches Length of wrenches and thickness of the heads ANSI/ASME B1.20.1, Pipe threads, general purpose (inch) 1)3 Terms and definitions For the purposes of this document, the following definitions apply. 3.1 Bourdon-tube pressure gauges device incorporat

29、ing elastic tube with direct indication by pointer and graduated scale of the pressure being measured 1) Published by and available from the American National Standards Institute (ANSI), 11 West 42nd Street, New York, NY 10036. BS EN ISO 5171:2010ISO 5171:2009(E) 2 ISO 2009 All rights reserved3.2 ca

30、se outer housing that contains the Bourdon tube and the movement 3.3 dial plate or area on which the scale is marked 3.4 flange circular extension of the case used for mounting 3.5 pointer indicator whose position in relation to the scale indicates the value of the measured pressure 3.6 pointer stop

31、 projection that stops the travel of the pointer 3.7 scale array of marks, together with any associated figuring, in relation to which the position of the pointer is observed 3.8 vent blowout device safety device or venting area incorporated in the case or backplate to permit the rapid safe dissipat

32、ion of internal pressure in the event of a leakage or burst in the Bourdon tube 3.9 window transparent front through which the dial is observed 4 Pressure 4.1 Unit of pressure All pressures given are gauge (effective) pressures in megapascals (MPa) and bar. 4.2 Maximum scale reading Where practical,

33、 the maximum scale reading for a particular gas and pressure level shall be selected from the values given in Table 1. Where not practical, the maximum scale reading shall be selected from the R10 series of preferred numbers or the more rounded values given in ISO 497. 4.3 Maximum pressure mark The

34、maximum operating pressure shall be indicated on the dial by a symbol or coloured mark and shall not exceed 3/4 of the maximum scale reading. NOTE For pressure gauges used with regulators conforming to ISO 2503, the maximum pressure mark is normally p2for low-pressure gauges and p1for high-pressure

35、gauges, as defined in ISO 2503:1998, Table 4. BS EN ISO 5171:2010ISO 5171:2009(E) ISO 2009 All rights reserved 3Table 1 Maximum scale reading Values in megapascals (bar) Pressure level Acetylene Oxygen and other gases Low-pressure (LP) 0,1 (1) 0,16 (1,6) 0,25 (2,5) 0,25 (2,5) 0,4 (4) 0,6 (6) 1,0 (10

36、) 1,6 (16) 2,5 (25) 4,0 (40) High-pressure (HP) a,b,c4 (40) 25 (250) 31,5 (315) 40 (400) a25 MPa (250 bar) pressure gauge for use with CO2and compressed gas cylinders filled to a maximum settled filling pressure of 18,5 MPa (185 bar) at 15 C. b31,5 MPa (315 bar) pressure gauge for use with compresse

37、d gas cylinders filled to a maximum settled filling pressure of 23 MPa (230 bar) at 15 C. c40 MPa (400 bar) pressure gauge for use with compressed gas cylinders filled to a maximum settled filling pressure of 30 MPa (300 bar) at 15 C. 5 Manufacturing requirements 5.1 Materials 5.1.1 General The mate

38、rials of the pressure gauge components liable to come into contact with the gas shall have adequate resistance to the chemical action of the gas under operating conditions. Bourdon tubes and other parts in contact with acetylene gas shall conform to ISO 9539. 5.1.2 Oxygen pressure gauges Bourdon tub

39、es and other parts in contact with the gas shall be resistant to the chemical action of the oxygen and shall not be flammable under operating conditions. Thread sealants or sealing rings shall also be resistant to the chemical action of the oxygen and shall not be flammable under operating condition

40、s. Components in contact with oxygen gas shall conform to ISO 9539. Only lubricants suitable for use in oxygen at the service pressure and temperature shall be used. 5.2 Design and dimensions 5.2.1 Operational requirement 5.2.1.1 Accuracy The pressure gauge accuracy shall be at least that of class 2

41、,5, i.e. with a maximum deviation within the tolerance, 2,5 % (of full-scale reading), over the entire scale. BS EN ISO 5171:2010ISO 5171:2009(E) 4 ISO 2009 All rights reserved5.2.1.2 Overpressure requirements Those parts of the pressure gauge that are in contact with the gas shall not burst or leak

42、 when tested to a pressure corresponding to 2,5 times the maximum scale reading (see 8.7). 5.2.1.3 Torsion After application of the torque of 10 Nm according to 8.4.1 for a period of not less than 30 s, the pressure gauge shall satisfy the conditions of accuracy specified in 5.2.1.1. After applicati

43、on of the torque of 25 Nm according to 8.4.2 for a period of not less than 30 s, the pressure gauge shall be leak-tight at a pressure corresponding to the maximum scale reading. The tests above apply to gauges with connecting threads of a nominal size of 1/4. Connecting threads of nominal size 1/8 s

44、hall only be used when equivalent safety can be demonstrated. 5.2.1.4 Bending After application of the load of 1 kN according to 8.5, the pressure gauge shall be leak-tight to atmosphere at a pressure corresponding to the maximum scale reading. 5.2.2 Dimensions The nominal size is based on the diame

45、ter of the casing (dimension A in Figures 1 and 2). The values 40, 50 and 63 are standardized. The dimensions shall be in accordance with Figure 1 and Table 2, or Figure 2 and Table 3, as appropriate. The connecting dimensions are shown in Figure 3 and Table 4. Figure 1 Pressure gauge with bottom en

46、try BS EN ISO 5171:2010ISO 5171:2009(E) ISO 2009 All rights reserved 5Table 2 Dimensions of pressure gauge with bottom radial entry B Normal size degrees A mm Parallel thread Tapered thread 40 270 5240+G1/8 B or G1/4 B R1/8 or 1/8-27 NPT EXT or R1/4 or 1/4-18 NPT EXT 50 270 7250+G1/8 B or G1/4 B R1/

47、8 or 1/8-27 NPT EXT or R1/4 or 1/4-18 NPT EXT 63 270 7263+G1/4 B R1/4 or 1/4-18 NPT EXT The thread connection (see Figure 3), according to the type, shall conform to the following standards: for parallel thread, ISO 228-1; for tapered thread (Symbol R), ISO 7-1; for tapered thread (Symbol NPT), ANSI

48、/ASME B1.20.1. Type B Type E Type F Key 1 fixing holes, F Figure 2 Pressure gauge with rear entry BS EN ISO 5171:2010ISO 5171:2009(E) 6 ISO 2009 All rights reservedTable 3 Dimensions of pressure gauge with rear entry B Normal size degreesAmaxmm Parallel thread Tapered thread Cmaxmm D mm Fminmm 40 27

49、0 42 G1/8 B or G1/4 B R1/8 or 1/8-27 NPT EXTor R1/4 or 1/4-18 NPT EXT 61 51 3,6 50 270 52 G1/8 B or G1/4 B R1/8 or 1/8-27 NPT EXTor R1/4 or 1/4-18 NPT EXT 68 60 3,6 63 270 67 G1/4 B R1/4 or 1/4-18 NPT EXT 81 75 3,6 The thread connection (see Figure 3), according to the type, shall conform to the following standards: for parallel thread, ISO 228-1; for tapered thread (symbol R), ISO 7-1; for tapered thread (Symbol NPT), ANSI/ASME B1.20.1. Key 1 spigot 2 wrench flats (square, hexagon or other fo