ISO 3834-4:2021 without combination with ISO 9001

Elementary quality requirements for fusion welding of metallic materials


According to ISO 9000, welding is a so-called «special process» which «cannot be validated easily or economically». Therefore, the specific requirements are defined in the ISO 3834-2 standard. It helps your welding company to meet quality requirements of customers and to produce high-quality and reliable products for the regulated and non-regulated field. Certification according to ISO 3834-2 creates confidence among your customers and reduces your liability risk.


ISO 3834-4 supports customer-oriented solutions and optimises process control. It reduces risks and costs.

Target groups

Manufacturers of welded components in regulated and unregulated fields.


3 years - there is an annual audit to ensure that standards are being maintained and a recertification audit after 3 years.


The SQS certificate of conformity with ISO 3834-4 has international validity and is recognised worldwide through the IQNET membership.


Stand-alone certification without combination with ISO 9001 (quality management); other standards on request.

Lead Auditor
Christoph Abert
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