IEC 60974-7:2019 pdf free

10-10-2020 comment

IEC 60974-7:2019 specifies safety and construction requirements for torches used for arc welding and allied processes. IEC 60974-7:2019,Arc welding equipment – Part 7: Torches.
IEC 60974-7:2019 is applicable to manual, mechanically guided, air-cooled, liquid-cooled, motorized, spool-on and fume extraction torches.
The heating test in accordance with 8.3 may be carried out on a separate sample and shall be followed by the coolant leakage test in accordance with Clause 9. The other tests included in this document and not listed here may be carried out in any convenient sequence.
6.3 Routine tests
The following routine tests shall be carried out on each TORCH in the following sequence:
a) general VISUAL INSPECTION;
b) functional test as specified by the manufacturer, for example, leaks of fluid or gas, trigger operation.
The HANDLES are tightly wrapped with a metal foil. The ABLE-HOSE ASSEMBLY is placed in contact with a conductive surface throughout its entire length, for example wrapped around a metal cylinder or coiled on a flat metal surface. The metal foil and the conductive surface are electrically connected.
The maximum permissible setting of the overload release shall be 100 mA. The high-voltage transformer shall deliver the prescribed voltage up to the tripping current. Tripping is regarded as a flashover or breakdown.

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