IEC 60974-2:20 19规定了电弧焊和相关工艺中用于冷却焊炬的工业和专业液体冷却系统的安全和施工要求。 本文件适用于独立（与焊接设备分离）或内置（与其他焊接设备一起安装在单个外壳中）的液体冷却系统。 第四版取消并取代了2013年出版的第三版，构成技术修订。 与上一版相比，此版本包括以下重大技术变更: a)IEC 60974-1:20 17发布引起的变化； b)变更11.1中的参考文献。

IEC 60974-2:2019 specifies safety and construction requirements for industrial and professional liquid cooling systems used in arc welding and allied processes to cool torches.
This document is applicable to liquid cooling systems which are stand-alone (separate from the welding equipment) or built-in (housed in a single enclosure with other welding equipment).
This fourth edition cancels and replaces the third edition published in 2013 and constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) changes induced by the publication of IEC 60974-1:2017;
b) reference in 11.1 changed.