1、July 2010 Translation by DIN-Sprachendienst.English price group 12No 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 1
2、7.100; 25.160.30!$iJG“1703936www.din.deDDIN EN ISO 5171Gas welding equipment Pressure gauges used in welding, cutting and allied processes(ISO 5171:2009)English translation of DIN EN ISO 5171:2010-07Gasschweigerte Manometer fr Schweien, Schneiden und verwandte Prozesse (ISO 5171:2009)Englische berse
3、tzung von DIN EN ISO 5171:2010-07Matriel de soudage aux gaz Manomtres utiliss pour le soudage, le coupage et les techniques connexes(ISO 5171:2009)Traduction anglaise de DIN EN ISO 5171:2010-07SupersedesDIN EN 562:2003-09www.beuth.deIn case of doubt, the German-language original shall be considered
4、authoritative.Document comprises 20 pages07.10 DIN EN ISO 5171:2010-07 2 A comma is used as the decimal marker. National foreword This standard has been prepared by Technical Committee ISO/TC 44 “Welding and allied processes”, Subcommittee SC 8 “Equipment for gas welding, cutting and allied processe
5、s” in collaboration with Technical Committee CEN/TC 121 “Welding” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was the Normenausschuss Schweitechnik (Welding Standards Committee), Working Committee NA 092-00-07 AA Ausrstung zum Gasschweien, Schneiden und verwa
6、ndte Prozesse. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 7-1 DIN EN 10226-1 (in parts identical) ISO 228-1 DIN EN ISO 228-1 ISO 497 DIN 323-1 and DIN 323-2 (in parts identical) ISO 1302 DIN EN ISO 1302 ISO 2503:1998 DIN EN ISO 250
7、3:1998 ISO 4589-2:1996 DIN EN ISO 4589-2:1999 ISO 7000:2004 DIN ISO 7000:2008 ISO 9539 DIN EN ISO 9539 ISO 10102 DIN 3110 (in parts identical) Amendments This standard differs from DIN EN 562:2003-09 as follows: a) The text of ISO 5171:2009 has been adopted in its entirety. b) Clause 2 “Normative re
8、ferences” has been updated. c) Clause 3 “Terms and definitions” has been extended. d) Clause 7 “Marking” has been modified. e) Figure 10 “Bend test Pressure gauge with rear entry” has been corrected. f) In subclause 8.6 “Case vent test”, the test pressure has been increased from 200 bar to 300 bar.
9、g) The bibliography has been updated. Previous editions DIN 1907: 1925-04, 1942-08 DIN 8549: 1953- 6, 1965-02 DIN 8549-1: 1973-04 DIN 8549: 1980-01, 1986-12 DIN EN 562: 1994-11, 2003-09 0DIN EN ISO 5171:2010-07 3 National Annex NA (informative) Bibliography DIN 323-1, Preferred numbers and series of
10、 preferred ounded alues DIN 323-2, Preferred umbers and eries of referred umbers Introduction DIN 3110, Engineers wrenches, double head Test torques series C DIN EN 10226-1, Pipe threads where pressure tight joints are made on the threads Part 1: Taper external threads and parallel internal threads
11、Dimensions, tolerances and designation DIN EN ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads Part 1: Dimensions, tolerances and designation DIN EN ISO 1302, Geometrical Product Specifications (GPS) Indication of surface texture in technical product documentation DIN
12、EN ISO 2503:1998, Gas welding equipment Pressure regulators for gas cylinders used in welding, cutting and allied processes up to 300 bar DIN EN ISO 4589-2:1999, Plastics Determination of burning behaviour by oxygen index Part 2: Ambient-temperature test DIN EN ISO 9539, Gas welding equipment Materi
13、als for equipment used in gas welding, cutting and allied processes DIN ISO 7000:2008, Graphical symbols for use on equipment Index and synopsis numbers Basic values, calculated values, r vn s p nDIN EN ISO 5171:2010-07 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE
14、NORM EN ISO 5171 March 2010 ICS 17.100; 25.160.30 Supersedes EN 562:2003English Version Gas welding equipment - Pressure 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
15、:2009) Gasschweigerte - Manometer fr Schweien, Schneiden und verwandte Prozesse (ISO 5171:2009) This European Standard 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 t
16、he 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 member. This European Standard exists in three official versions (English, French, Ger
17、man). 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 members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cypru
18、s, Czech 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 United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COM
19、IT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 5171:2010: EContents DIN EN ISO 5171:2010-07 EN ISO 5171:2010
20、(E) 2 Page Foreword3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Pressure5 4.1 Unit of pressure .5 4.2 Maximum scale reading 5 4.3 Maximum pressure mark 5 5 Manufacturing requirements 6 5.1 Materials .6 5.2 Design and dimensions 6 6 Safety . 11 7 Marking 11 8 Tests. 11 8.1 Genera
21、l. 11 8.2 Design and manufacturing standard 12 8.3 Accuracy 12 8.4 Torsion test . 13 8.5 Bend test 13 8.6 Case vent test 14 8.7 Overpressure test . 15 8.8 Flammability test. 15 Bibliography. 16 Foreword DIN EN ISO 5171:2010-07 EN ISO 5171:2010 (E) 3 The text of ISO 5171:2009 has been prepared by Tec
22、hnical Committee ISO/TC 44 “Welding and allied 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 September 2010, and conflicting national standards shall be withdrawn at the latest by September 2010
23、. 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 EN 562:2003. According to the CEN/CENELEC Internal Regulati
24、ons, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
25、 Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 5171:2009 has been approved by CEN as a EN ISO 5171:2010 without any modification. EN ISO 5171:2010 by Technical Committee CEN/TC 121 “Welding” t
26、he secretariat of which is held by DIN. processes” of the International Organization for Standardization (ISO) and has been taken over as 1 Scope This International Standard specifies requirements for Bourdon-tube pressure gauges normally used with compressed gas systems at pressures up to 30 MPa (3
27、00 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-manufacturing plants. 2 Normative references The following referenced documents are indispensable for the applicati
28、on 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 7-1, Pipe threads where pressure-tight joints are made on the threads Part 1: Dimensions, tolerances and designatio
29、n 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 numbers and of series containing more rounded values of preferred numbers ISO 4589-2:1996, Plastics Determination of bu
30、rning 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 and nuts Double-headed open-ended engineers wrenches Length of wrenches and thickness of the heads ANSI/ASME B1.20
31、.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 incorporating elastic tube with direct indication by pointer and graduated scale of the pressure being measured 1) Published
32、by and available from the American National Standards Institute (ANSI), 11 West 42nd Street, New York, NY 10036. DIN EN ISO 5171:2010-07 EN ISO 5171:2010 (E) 4 3.2 case 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 circul
33、ar 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 projection that stops the travel of the pointer 3.7 scale array of marks, together with any associated figuring, in relation to which
34、 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 dissipation 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
35、 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, the maximum scale reading for a particular gas and pressure level shall be selected from the values given in Table 1. Where not pract
36、ical, 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 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 r
37、eading. 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 gauges, as defined in ISO 2503:1998, Table 4. DIN EN ISO 5171:2010-07 EN ISO 5171:2010 (E) 5 Table 1 Maximum scale reading Values in m
38、egapascals (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) 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
39、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 compressed 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 cy
40、linders 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 materials 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 op
41、erating conditions. Bourdon tubes and other parts in contact with acetylene gas shall conform to ISO 9539. 5.1.2 Oxygen pressure gauges Bourdon tubes 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.
42、 Thread sealants or sealing rings shall also be resistant to the chemical action of the oxygen and shall not be flammable under operating conditions. Components in contact with oxygen gas shall conform to ISO 9539. Only lubricants suitable for use in oxygen at the service pressure and temperature sh
43、all 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 2,5, i.e. with a maximum deviation within the tolerance, 2,5 % (of full-scale reading), over the entire scale. DIN EN ISO 5171:2010-07 EN ISO 5171:2010 (E
44、) 6 5.2.1.2 Overpressure requirements Those parts of the pressure gauge that are in contact with the gas shall not burst or leak 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
45、 period of not less than 30 s, the pressure gauge shall satisfy the conditions of accuracy specified in 5.2.1.1. After application 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 rea
46、ding. The tests above apply to gauges with connecting threads of a nominal size of 1/4. Connecting threads of nominal size 1/8 shall 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
47、 to atmosphere at a pressure corresponding to the maximum scale reading. 5.2.2 Dimensions The nominal size is based on the diameter 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
48、and Table 3, as appropriate. The connecting dimensions are shown in Figure 3 and Table 4. Figure 1 Pressure gauge with bottom entry DIN EN ISO 5171:2010-07 EN ISO 5171:2010 (E) 7 Table 2 Dimensions of pressure gauge with bottom radial entry B Normal size degrees A mm Parallel thread Tapered thread 4
49、0 270 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 R1/8 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/ASME B1.20.1. Type B Type E Type F Key 1 fixing holes, F Figure 2 Pressure gauge with r
