Overview
EN ISO 3834-2:2021 - "Quality requirements for fusion welding of metallic materials - Part 2: Comprehensive quality requirements" - defines the comprehensive quality requirements for fusion welding of metallic materials in both workshop and field installation environments. Issued as a CEN adoption of ISO 3834-2:2021, this third edition replaces the 2005 version and sets out mandatory elements for organizations that need the highest level of welding quality assurance.
Key topics
The standard addresses a full system of welding quality controls and contains requirements on topics including:
- Review of requirements and technical review of welding specifications and contracts
- Sub‑contracting controls and responsibilities
- Welding personnel: qualifications for welders, welding operators and welding coordination personnel
- Inspection and testing personnel, including non‑destructive testing competency
- Equipment: selection, description, suitability, new equipment introduction and maintenance
- Welding and related activities: production planning, welding procedure specifications (WPS), procedure qualification and work instructions
- Welding consumables: batch testing, storage and handling
- Storage of parent materials and post‑weld heat treatment controls
- Inspection and testing before, during and after welding; inspection status and records
- Non‑conformance and corrective actions, plus calibration and validation of measuring and test equipment
- Identification and traceability and quality records management
These clauses form a comprehensive quality framework aimed at ensuring weld integrity and conformity to project requirements.
Applications and users
EN ISO 3834-2:2021 is intended for organizations that require a high level of assurance for fusion welding processes. Typical users include:
- Welding coordinators and quality managers responsible for welding programs
- Fabrication workshops and contractors performing on-site installations
- Inspection and testing personnel and third‑party certifiers
- Procurement and engineering teams specifying welding quality requirements
The standard is applicable wherever fusion welding of metallic materials must meet rigorous quality controls - for example, in structural steelwork, pressure equipment, pipeline works and heavy fabrication projects.
Related standards
- ISO 3834‑1 - Criteria for selecting the appropriate level of quality requirements (referenced by Part 2)
- ISO 3834‑5 - Documents needed to claim conformity to ISO 3834 parts
- EN ISO 3834 series (other parts) - Part 2 is the comprehensive level within the series
EN ISO 3834-2:2021 is a central reference when specifying welding quality requirements and helps organizations demonstrate controlled, traceable and auditable fusion welding practices.
