GSI – Gesellschaft für Schweißtechnik international mbH
SLV – Schweißtechnische Lehr- und Versuchsanstalten
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Welder qualification tests

Why is a welder qualification test necessary?

The necessity of welder qualification tests relates to assuring the quality of welding work which is carried out by your employees. The deployment of certified welders is stipulated in many sets of rules, e.g. in DIN EN 1090, the Machine Directive, the Pressure Equipment Directive etc., or sufficiently qualified personnel is demanded within the framework of the product liability and by the client.

Welder qualification tests for manual welds with the autogenous, manual metal arc, MIG/MAG and TIG welding processes are required, for example, for components made of steel or aluminium for tank structures, steam boilers, civil engineering, bridge and hydraulic structures, pressure equipment, ships, pipelines, rail and road vehicles, wind energy installations (onshore and offshore) etc.

We offer you ...

  • Support and training with regard to the welding task before the welder qualification test
  • Conducting the qualification test welding procedures and conducting the specialist theoretical qualification test
  • Assistance during the elaboration of welding procedure specifications (WPSs)
  • Qualified testing and assessment of the test pieces
  • Elaboration of the qualification test certificates according to the stipulated set of rules
  • In the event of urgency, also as a 24-hour service
  • Internal archiving and documentation
  • Pointing out the expiry of the validity in good time (a free service from us)

The object of the qualification test is to prove the manual skills and specialist theoretical knowledge of the welder.

Moreover, we are happy to ensure that any additional stipulations, e.g. building site conditions, mirror welding etc., are complied with.


So that we can guarantee a smooth sequence, we are asking you to get in touch with us in good time before the execution of the welder qualification test.

Sets of rules 

As a recognised qualification testing body, we carry out welder qualification tests on tubes and plates as well as for all the material groups according to the following sets of rules:

  • DIN EN ISO 9606‑1 (steel)
  • DIN EN ISO 9606‑2 (aluminium)
  • DIN EN ISO 9606‑3 (copper)
  • DIN EN ISO 9606‑4 (nickel)
  • DIN EN ISO 9606‑5 (titanium)
  • DIN EN 287‑6 (cast iron)

Also for the field of welded pressure equipment and pipelines, we certify your welders according to the Pressure Equipment Directive.

Contact person

SLV Duisburg

SLV Fellbach

SLV Hannover

SLV Mannheim

SLV München