This part of IEC 60974 specifies safety and construction requirements for TORCHES used for arc welding and allied processes. This document is applicable to MANUAL, MECHANICALLY GUIDED, AIR-COOLED, LIQUID-COOLED, MOTORIZED, SPOOL-ON and FUME EXTRACTION TORCHES. In this document, a TORCH consists of the TORCH BODY, the CABLE-HOSE ASSEMBLY and other components. This document is also applicable to a CABLE-HOSE ASSEMBLY connected between a power source and ancillary equipment. This document is not applicable to electrode holders for manual metal arc welding or air-arc cutting\/gouging. NOTE 1 Typical allied processes are electric arc cutting and arc spraying. NOTE 2 Other components are listed in Table A.1. NOTE 3 In this document, all procedures and requirements are the same for “TORCHES” and “GUNS”. For convenience, the term “TORCH” is used in the following text.<\/p>\n
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| 2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 5<\/td>\n | Annex ZA(normative)Normative references to international publicationswith their corresponding European publications <\/td>\n<\/tr>\n | ||||||
| 6<\/td>\n | Annex ZZ (informative)Relationship between this European standard and the safety objectives of Directive 2014\/35\/EU [2014 OJ L96] aimed to be covered <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | English CONTENTS <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | FOREWORD <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 1 Scope 2 Normative references 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 4 Environmental conditions <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 5 Classification 5.1 General 5.2 Process 5.3 Guidance 5.4 Cooling 5.5 Main arc striking for plasma processes 6 Test conditions 6.1 General <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 6.2 Type tests 6.3 Routine tests 7 Protection against electric shock 7.1 Voltage rating <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 7.2 Insulation resistance Tables Table 1 \u2013 Voltage rating of torches <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | 7.3 Dielectric strength 7.3.1 General requirement 7.3.2 Additional requirements for plasma cutting torches 7.4 Protection against electric shock in normal service (direct contact) 7.4.1 Degree of protection requirements 7.4.2 Additional requirements for plasma cutting torches <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 7.5 Requirements for arc striking and stabilizing voltage rating 7.5.1 General requirement 7.5.2 Arc striking and stabilizing voltage test <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | 8 Thermal rating 8.1 General 8.2 Temperature rise 8.3 Heating test 8.3.1 General <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | 8.3.2 Metal inert\/active gas (MIG\/MAG) or self-shielded flux-cored arc welding torch Table 2 \u2013 Test values for metal inert gas arc welding (MIG) of aluminium alloys <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | Table 3 \u2013 Test values for metal active gas arc welding (MAG) of mild steel Table 4 \u2013 Test values for metal active gas arc welding (MAG) with flux-cored wire <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | 8.3.3 Tungsten inert gas (TIG) and plasma arc welding torch Table 5 \u2013 Test values for self-shielded flux-cored arc welding of mild steel Table 6 \u2013 Test values for tungsten inert gas arc welding (TIG) <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | 8.3.4 Plasma cutting torch 8.3.5 Submerged arc welding torch Table 7 \u2013 Test values for plasma arc welding <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | 9 Pressure of the liquid cooling system 10 Resistance to hot objects Figures Figure 1 \u2013 Device for testing the resistance to hot objects <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | 11 Mechanical provisions 11.1 Impact resistance Figure 2 \u2013 Device for the impact test <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | 11.2 Accessible parts 11.3 Handle material 12 Marking 13 Instructions for use <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | Annex A (informative)Additional terminology Table A.1 \u2013 List of terms <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | Figure A.1 \u2013 Torch for metal inert\/active gas (MIG\/MAG) or self-shielded flux-cored arc welding Figure A.2 \u2013 Gun for metal inert\/active gas (MIG\/MAG) or self-shielded flux-cored arc welding Figure A.3 \u2013 Torch for tungsten inert gasarc welding Figure A.4 \u2013 Torch for plasma arc welding <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | Figure A.5 \u2013 Torch for plasma cutting Figure A.6 \u2013 Supply unit Figure A.7 \u2013 Mechanically guided plasma torch <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | Annex B (normative)Position of the welding torches for the heating test Figure B.1 \u2013 MIG\/MAG torches Figure B.2 \u2013 TIG torches Figure B.3 \u2013 Plasma welding torches <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | Annex C (informative)Cooled copper block Figure C.1 \u2013 Water-cooled copper block \u2013 Example <\/td>\n<\/tr>\n | ||||||
| 34<\/td>\n | Annex D (informative)Copper block with a hole Figure D.1 \u2013 Water-cooled copper block with a hole \u2013 Example <\/td>\n<\/tr>\n | ||||||
| 35<\/td>\n | Annex E (informative)Copper bars with a slot Figure E.1 \u2013 Water-cooled copper bars with a slot \u2013 Example <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Arc welding equipment – Torches<\/b><\/p>\n |