1、December 2011 Translation by DIN-Sprachendienst.English price group 11No 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).I
2、CS 25.160.30!$xXZ“1855355www.din.deDDIN EN ISO 9012Gas welding equipment Air-aspirated hand blowpipes Specifications and tests (ISO 9012:2008)English translation of DIN EN ISO 9012:2011-12Gasschweigerte Handbrenner fr angesaugte Luft Anforderungen und Prfungen (ISO 9012:2008)Englische bersetzung von
3、 DIN EN ISO 9012:2011-12quipement de soudage aux gaz Chalumeaux manuels aro-gaz air aspir Spcifications et essais (ISO 9012:2008)Traduction anglaise de DIN EN ISO 9012:2011-12SupersedesDIN EN 731:1995-08www.beuth.deDocument comprises 17 pagesIn case of doubt, the German-language original shall be co
4、nsidered authoritative.12.11 DIN EN ISO 9012:2011-12 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 processes” and has been ta
5、ken over without any modification by 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, Schneid
6、en und verwandte Prozesse. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 554 similar to DIN 50014:1985-07 (withdrawn: 2008-09) ISO 3253 similar to DIN EN 560 ISO 9090 DIN ISO 9090 ISO 9539 DIN EN ISO 9539 Amendments This standard diff
7、ers from DIN EN 731:1995-08 as follows: a) Clause 2 “Normative references” has been updated; b) Subclause 6.5 “Hose connection” has been revised; c) in Clause 9 “Code letters identifying the gas(es) used” a new code letter “Y” has been added; d) a Bibliography has been included. Previous editions DI
8、N 8543-4: 1981-11 DIN EN 731: 1995-08 National Annex NA (informative) Bibliography DIN 50014:1985-07, Climates and their technical application Standard atmospheres DIN EN 560, Gas welding equipment Hose connections for equipment for welding, cutting and allied processes DIN EN ISO 9539, Gas welding
9、equipment Materials for equipment used in gas welding, cutting and allied processes DIN ISO 9090, Gas tightness of equipment for gas welding and allied processes EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 9012 October 2011 ICS 25.160.30 Supersedes EN 731:1995English Version Gas welding
10、 equipment - Air-aspirated hand blowpipes - Specifications and tests (ISO 9012:2008) quipement de soudage aux gaz - Chalumeaux manuels aro-gaz air aspir - Spcifications et essais (ISO 9012:2008) Gasschweigerte - Handbrenner fr angesaugte Luft - Anforderungen und Prfungen (ISO 9012:2008) This Europea
11、n Standard was approved by CEN on 18 September 2011. 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 co
12、ncerning 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, German). A version in any other language made by translation under the responsibility of a CEN member
13、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, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ir
14、eland, 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 KOMITEE FR NORMUNG Management Centre: Avenue Marnix
15、 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 9012:2011: EContents Page Foreword3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Main types of aspiration5 5 Description of components
16、 8 5.1 Shank or handle 8 5.2 Attachment .8 5.3 Self-closing on/off valve control 9 5.4 Device to prevent inadvertent operation.9 6 Requirements.9 6.1 General9 6.2 Materials .9 6.3 Valves9 6.4 Shank 9 6.5 Hose connection10 6.6 Gas tightness .10 6.7 Gas-flow rate 10 6.8 Safety against sustained backfi
17、ring and blowing-off of the flame .10 6.9 Flame adjustment 10 6.10 Stability in air currents10 6.11 Ignition 11 7 Tests11 7.1 General11 7.2 General checks 11 7.3 Operational tests11 7.4 Shank-overheating tests .11 7.5 Gas tightness .11 7.6 Valve endurance test.12 7.7 Checking gas-flow rates .12 7.8
18、Safety against sustained backfire and blowing-off of the flame 12 7.9 Stability in air currents12 7.10 Verification of the device against inadvertent operation 12 8 Marking .12 8.1 General12 8.2 Marking of the shank.13 8.3 Marking of the attachment 13 9 Code letters identifying the gas(es) used .13
19、10 Instructions for use .13 Bibliography 15 EN ISO 9012:2011 (E) DIN EN ISO 9012:2011-12 2 Foreword The text of ISO 9012:2008 has been prepared by Technical Committee ISO/TC 44 “Welding and allied processes” of the International Organization for Standardization (ISO) and has been taken over as EN IS
20、O 9012:2011 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 or by endorsement, at the latest by April 2012, and conflicting national standards shal
21、l be withdrawn at the latest by April 2012. 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 731:1995. Acco
22、rding 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, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, It
23、aly, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 9012:2008 has been approved by CEN as a EN ISO 9012:2011 without any modification. EN ISO 9012:2011 (E)
24、 DIN EN ISO 9012:2011-12 3 1 Scope This International Standard specifies requirements and test methods for air-aspirated hand blowpipes. This International Standard applies to blowpipes for brazing, soldering, heating, fusion and other allied thermal processes, which use a fuel gas and aspirated air
25、 (injector-type blowpipes), and are intended for manual use. This International Standard is applicable to: air-aspirated hand blowpipes which are fed with a fuel gas in the gaseous phase, at a controlled pressure by a regulator, through a gas supply hose; air-aspirated hand blowpipes which are fed w
26、ith a liquefied fuel gas in the gaseous phase at the container pressure, through a gas supply hose; so-called liquid-phase blowpipes which are fed with a fuel gas in the liquid phase, and where thermal evaporation takes place within the blowpipe. It does not apply to blowpipes in which the fuel gas
27、leaves the injector in the liquid phase, or to so-called “cartridge” blowpipes where the gas supply is fixed directly onto the blowpipe and possibly constitutes the shank. NOTE Figures 1 to 4 of this International Standard are given for guidance only, to facilitate the explanation of the terms. They
28、 do not specify the construction details which are left to the discretion of the manufacturer. 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 ed
29、ition of the referenced document (including any amendments) applies. ISO 554, Standard atmospheres for conditioning and/or testing Specifications ISO 9090, Gas tightness of equipment for gas welding and allied processes ISO 9539, Materials for equipment used in gas welding, cutting and allied proces
30、ses 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 air-aspirated blowpipe blowpipe in which the fuel gas leaves the injector in the gaseous phase, being subsequently mixed in the mixing zone with a sufficient quantity of air, aspirated from
31、the ambient atmosphere, to produce a technically usable flame EN ISO 9012:2011 (E) DIN EN ISO 9012:2011-12 4 See Figure 1. NOTE See Table 1 for the key to Figure 1. Figure 1 Schematic drawing of the mixing zone 3.2 sustained backfire penetration of the flame into the blowpipe, with continued burning
32、 upstream of the part intended for this purpose, i.e. within: the blowpipe nozzle, behind the grid or flame-supporting devices; the tube; the blowpipe shank. 3.3 blowing-off of the flame detachment of the flame from the blowpipe nozzle, possibly causing the flame to be extinguished 4 Main types of a
33、spiration Depending on the location of the mixing zone, a distinction is made between blowpipes with air aspiration in the: a) attachment (see Figure 2); b) nozzle (see Figure 3); c) shank (see Figure 4). EN ISO 9012:2011 (E) DIN EN ISO 9012:2011-12 5 NOTE See Table 1 for the key to Figure 2. Figure
34、 2 Examples of blowpipes with air aspiration in the attachment NOTE See Table 1 for the key to Figure 3. Figure 3 Examples of blowpipes with air aspiration in the nozzle EN ISO 9012:2011 (E) DIN EN ISO 9012:2011-12 6 NOTE See Table 1 for the key to Figure 4. Figure 4 Examples of blowpipes with air a
35、spiration in the shank Table 1 Labels for Figures 1 to 4 Assemblies Items A hose 1 handle B shank 2 valve C attachment with air aspiration 3 hose connection D soldering attachment with air aspiration with a copper bit 4 head connection E bent tube 5 injector F straight tube 6 air inlet G blowpipe no
36、zzle with air aspiration 7 tube (may include air inlet) H liquid-phase nozzle with air aspiration 8 blowpipe nozzle I injector-type shank 9 soldering bit J attachment for bit soldering 10 bit support K attachment (without injector) 11 connection 12 adjustment of air inlet 13 control of automatic fla
37、me-reducing device 14 vaporization for system liquid-phase blowpipe 15 ignition system 16 on/off valve control EN ISO 9012:2011 (E) DIN EN ISO 9012:2011-12 7 5 Description of components 5.1 Shank or handle (see Figures 2 and 3, assembly B, and Figure 4, assembly I) 5.1.1 General The shank is used fo
38、r holding the attachment. It includes the system for fitting the hose and the gas control device(s). It may also include the injector (see Figure 4, assembly I). 5.1.2 Valve shank (see Figures 2 and 3, assembly B, and Figure 4, assembly I) This type of shank is fitted with a single valve (item 2) fo
39、r opening, shutting and regulating the gas-flow rate. 5.1.3 Shank with automatic flame-reducing device (see Figures 2 and 3, assembly B) This type of shank is fitted with two separate control devices: a valve (item 2) which controls the gas-flow rate under normal working conditions, e.g. a knob; an
40、automatic flame-reducing device (item 13) operated by a simple release mechanism, e.g. a trigger. 5.1.4 Shank with pressure-control or pressure-reducing device This type of shank is fitted with a device for the control or reduction of gas pressure. 5.1.5 Shank with ignition system This shank is fitt
41、ed with a valve or an on/off valve control for the gas and with an ignition system acting simultaneously or separately. 5.2 Attachment 5.2.1 General The attachment is generally composed of a nozzle or burner and a tube. 5.2.2 Nozzle or burner (see Figures 2, 3 and 4, assemblies G, H and item 8) The
42、shape of the nozzle depends on the work to be performed, for example: brazing or soldering; heating; paint removal; drying; bit soldering. The nozzle may include the injector (see Figure 3, item 5) as well as the supports and automatic lighting devices of the blowpipe. In liquid-phase blowpipes, the
43、 nozzle also incorporates the vaporization device (see Figure 3, item 14). NOTE Figures 2, 3 and 4 show only limited examples of blowpipes nozzles. The nozzles come in a great variety of shapes, particularly in the case of multiflame blowpipes for circumferential heating, etc. EN ISO 9012:2011 (E) D
44、IN EN ISO 9012:2011-12 8 5.2.3 Tube The tube (item 7) connects the blowpipe nozzle to the shank. It may be of various lengths and shapes depending on the application for which it is designed. It may incorporate the injector (see Figure 2, item 5). Not all blowpipes have a tube. The tube may be perma
45、nently fitted to the blowpipe nozzle (see Figure 2, assemblies C and D, and Figure 4, assemblies J and K) or may act as a connecting tube between the nozzle and the shank (see Figure 3, assemblies E and F). 5.3 Self-closing on/off valve control This valve control stops the gas flow as soon as manual
46、 grip is released. 5.4 Device to prevent inadvertent operation Device to prevent inadvertent gas flow or ignition. 6 Requirements 6.1 General The type of blowpipe shall correspond to the intended use and to the nature of the gas. For the design details not imposed by this International Standard, the
47、 manufacturer shall give primary consideration to the safety requirements. 6.2 Materials Materials used for the construction of these blowpipes shall conform to the requirements of ISO 9539. 6.3 Valves It shall not be possible to bypass closed on/off valve(s). Valves and valve elements shall remain
48、fixed in position when valves are operated or fully open. Furthermore, it shall not be possible to disassemble any of the various external valve elements without the use of a tool. The blowpipe shall be designed or equipped with a device to prevent the gas from flowing in the event of an inadvertent operation of the control device (see Figures 2 and 3, item 13, and Figure 4, item 16), if fitted. 6.4 Shank The shank shall comprise at least the gas supply shut-off valve. Shanks fitted with a
