ISO 3834 certification applies to the special process of welding. It requires enterprises to integrate design, process, production and quality assurance into a mature management system to guarantee final product quality. Based on the ISO 9000 framework and actual welding application conditions, ISO 3834 specifies comprehensive quality control requirements for welding activities. It is a mandatory quality system for many European certifications, including steel structure EN 1090 and railway vehicle EN 15085.
International Welding System ISO 3834 Certification
Introduction to ISO 3834 Welding System Certification
Components of ISO 3834
The ISO 3834 series consists of three core parts:
The first part defines selection rules for quality levels. Manufacturers shall adopt ISO 3834-2, ISO 3834-3 or ISO 3834-4 according to product standards, specifications and contractual requirements.
The second part specifies graded quality requirements: ISO 3834-2 (Full quality requirements), ISO 3834-3 (Standard quality requirements) and ISO 3834-4 (Basic quality requirements). Compliance with a higher level automatically covers all lower-level requirements without additional verification.
The third part lists mandatory documents required to demonstrate conformity with ISO 3834-2, ISO 3834-3 or ISO 3834-4.
ISO 3834 Audit Requirements
ISO 3834 establishes full‑range quality control for welding production. The main audit items are as follows:
- 01Technical and requirement review
- 02Outsourcing and subcontracting management
- 03Qualified welding personnel
- 04Inspection and testing staff
- 05Production and processing equipment
- 06Welding and related operational activities
- 07Welding consumables management
- 08Base material storage control
- 09Post‑weld heat treatment
- 10In-process and final inspection & testing
- 11Non-conformity handling and corrective actions
- 12Calibration of measuring and testing equipment
- 13Product marking and traceability
- 14Quality record management
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