ISO 17662:2025

Overview

ISO 17662:2025 - "Welding - Calibration, verification and validation of equipment used for welding, including ancillary activities" - defines requirements for ensuring measuring and control equipment used in welding fabrication is fit for purpose. The standard covers calibration, verification and validation of equipment that controls process variables during production or on-site welding where the resulting output cannot be readily or economically verified by subsequent inspection or testing. It is focused on variables that influence the fitness‑for‑purpose and safety of the fabricated product.

Key topics and technical requirements

• Scope and applicability
  • Applies to equipment used in production or on-site welding and allied processes; does not cover manufacture/installation of equipment or calibration performed solely for final product inspection.
• Definitions and metrology: clear definitions of calibration, verification, validation, traceability, accuracy and repeatability to support consistent implementation.
• General requirements: programmatic controls for frequency, documentation and traceability of calibration and verification activities.
• Process-variable focus: emphasis on equipment controlling variables that cannot be economically documented later (e.g., weld current, heat input, gas flow, preheat temperature).
• Process-specific requirements: detailed sections address different welding/brazing groups such as arc welding, resistance welding, plasma, laser and electron beam welding, brazing and soldering, stud and friction welding, pre/post‑weld heat treatment, flame cutting and ancillary processes.
• Annexes
  • Annex B: guidance on acceptance testing of equipment (useful for procurement and factory acceptance).
  • Annex C: guidance when multiple parties (manufacturers, suppliers, calibration labs, contractors) are involved.
• Normative references: cites related standards (e.g., ISO 669, ISO 5171, ISO 5826) and links to welding procedure standards such as the ISO 15609 series.

Practical applications - who uses ISO 17662:2025

• Welding engineers and procedure writers implementing validated welding processes.
• Quality managers and QA/QC teams establishing calibration and verification programs for welding equipment.
• Calibration laboratories and service providers performing on-site or factory calibration/acceptance testing.
• Contractors and fabricators responsible for production welding and on-site fabrication.
• Procurement and asset managers evaluating acceptance testing requirements for new or refurbished welding equipment.

Benefits and integration

• Improves process control, traceability and documentation of critical welding parameters.
• Supports safety and fitness‑for‑purpose by ensuring equipment reliably controls key variables.
• Can be integrated into ISO 9001 quality systems, welding quality plans, and supplier contracts.

Related standards

• ISO 15609 series (welding procedure specification variables)
• ISO 669, ISO 5171, ISO 5826 (normative references cited in ISO 17662)
• ISO 9001 (quality management systems - related calibration requirements)

Keywords: ISO 17662:2025, welding calibration, verification, validation, welding equipment, process variables, acceptance testing, traceability, welding quality.