ISO 3834 Series QMS Certifications
Quality requirements for fusion welding of metallic materials.
Welding is extensively used in manufacturing across energy, chemical, petrochemical, oil and gas, and construction sectors. The ISO 3834 series establishes Quality Requirements for Fusion Welding of Metallic Materials — covering the management of welding as a special process where quality cannot be fully verified by final inspection alone.
Why welding management matters
The quality of the weld and/or welded joint is obtained through the execution of validated welding processes systematically implemented by a company. Quality control alone cannot compensate for poor welding processes — prevention through proper management is essential.
Standards in the series
The framework includes four core standards with increasing requirements: ISO 3834-1:2021 (selection criteria), ISO 3834-2:2021 (comprehensive requirements), ISO 3834-3:2021 (standard requirements) and ISO 3834-4:2021 (elementary requirements). Plus ISO/TR 3834-6:2012 as an application guide.
Why it's often referenced
Regulatory mandates reference these standards. For example, EN 12952-5 requires manufacturers to meet ISO 3834-2 for water tube boilers, while EN 13445 mandates at least ISO 3834-3 compliance for pressure vessels. ISO 9001 designates welding as a special process requiring documented procedures — ISO 3834 is the natural extension.
Certification cycle
Companies submit a quotation request providing scope details, company characteristics, site information, outsourced processes, applicable standards and any security requirements. Initial certification spans 60 months with renewal audits thereafter, including Stage 2 audits and annual surveillance inspections.
What's included
- ISO 3834-2 — comprehensive requirements
- ISO 3834-3 — standard requirements
- ISO 3834-4 — elementary requirements
- Welding coordinator competence verification
- WPS/PQR documentation review
- Supports PED H/H1, EN 1090, ISO 19443
Benefits to your organization
- Demonstrates control of welding as a special process
- Accepted internationally
- Strong supporting evidence for sector certifications