IEC 60974-2:2019

Overview

IEC 60974-2:2019 is an international standard published by the International Electrotechnical Commission (IEC) focusing on liquid cooling systems used in arc welding equipment. This fourth edition updates the previous 2013 version and aligns with changes introduced in IEC 60974-1:2017. It specifies safety and construction requirements for industrial and professional liquid cooling systems designed to cool arc welding torches.

The standard applies to:

• Stand-alone liquid cooling systems (separate from welding units)
• Built-in liquid cooling systems (integrated within a single enclosure alongside welding equipment)

The document ensures these cooling systems operate safely, reliably, and efficiently in various welding and allied processes, improving torch durability and performance.

Key Topics

IEC 60974-2:2019 covers multiple critical aspects of liquid cooling systems for welding equipment:

• Safety requirements
  Addresses protection against electric shock during normal and fault conditions, insulation standards, and protective circuit design to safeguard users.

• Mechanical construction
  Includes requirements for hose coupling devices, cooling liquid overflow prevention, and overall build integrity.

• Cooling system performance
  Specifies rated maximum pressure, thermal requirements, heating tests, and cooling power measurements to guarantee system effectiveness.

• Environmental considerations
  Defines operating conditions and tests for system endurance under specified environments.

• Testing procedures
  Details conformity tests, routine tests, type tests, and measurement of leakage current and dielectric strength.

• Marking and instructions
  Provides guidance on information to be displayed on rating plates, inlet/outlet markings, pressure warnings, and comprehensive user instructions.

• Electrical supply interfaces
  Covers connection means, multi-supply voltages, supply circuit components, cable anchorage, and power supply switching devices.

Applications

IEC 60974-2:2019 is directly applicable to manufacturers, designers, and safety engineers involved with:

• Production and development of industrial arc welding machines with liquid-cooled torches
• Design and integration of liquid cooling systems that extend torch life and improve welding efficiency
• Ensuring compliance with international safety standards in professional welding environments
• Maintaining high operational reliability in welding setups used for metal fabrication, automotive manufacturing, shipbuilding, and heavy engineering
• Providing end-users with clear safety markings and operation instructions to prevent equipment misuse and accidents

Adhering to this standard helps organizations achieve consistent product quality, enhance user safety, optimize cooling system performance, and facilitate global market access.

Related Standards

For comprehensive compliance and performance, IEC 60974-2:2019 should be applied alongside related IEC standards in arc welding equipment, including:

• IEC 60974-1:2017 - Arc welding equipment - Part 1: Welding power sources
  Defines safety and performance requirements for welding power sources, referenced within IEC 60974-2.

• Other parts of the IEC 60974 series covering specific welding equipment and processes to ensure a complete standardization framework for arc welding technology.

Consulting these standards collectively supports the design and manufacture of fully compliant, safe, and efficient arc welding systems with integrated liquid cooling solutions.

Keywords: IEC 60974-2, liquid cooling systems, arc welding equipment, torch cooling, welding safety standards, industrial liquid cooling, welding system construction, electrical safety in welding, cooling system testing, welding equipment standards.