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The international series of standards DIN EN ISO 3834 specifies welding quality requirements for manufacturers and regulates the principles for quality assurance of fusion-welded components and constructions.

DIN EN ISO 3834 covers welding in series production, individual production, repair and on the construction site (assembly) and applies to all welding applications. It assumes the function of the quality management system in welding and is at the same time the basis for the fulfilment of the standard requirements in specific application regulations such as EN 1090-1 and EN 15085-2.

This standard consists of 5 parts

Criteria for the selection of the appropriate level of quality requirements for fusion welding of metallic materials


Extensive quality requirements


Standard quality requirements


Elementary quality requirements


Documents whose requirements must be met in order to demonstrate compliance with the requirements of ISO 3834-2, ISO 3834-3 or ISO 3834-4


Your advantages at a glance

  • You are assured of worldwide recognition of the certificate.
  • You will experience a significant increase in your competitiveness.
  • Your ISO 3834 certificate can be viewed in the publicly accessible online register JOINCERT - ISO3834.

  • Build trust with your customers.

Certification procedure


Preliminary talk


Application for certification


Pre-audit (optional)



Checking whether the welding quality requirements are met.



Issue of the certificate

ISO 9001 certification requires a visible structure and organisation of the company as well as a clear definition of responsibilities and tasks in the departments. All this must be available in documented form.



Annual monitoring

Inspection to maintain the welding quality requirements by means of a questionnaire. In the event of significant changes, an audit is carried out on site.




After three years, the welding quality requirements are reviewed to extend the certification.


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