GSI – Gesellschaft für Schweißtechnik international mbH
SLV – Schweißtechnische Lehr- und Versuchsanstalten
Schweißtechnik - WeiterbildungschweißenSchweißtechnik Indrustrie


On behalf of natural persons (private customers) or legal persons (companies and authorities), GSI carries out inspections worldwide with its highly qualified and experienced engineers and technologists.

Inspections always have the objective of making a binding statement about the conformity and/or performance of, for example, materials, products, installations, plants, processes, working sequences or services. In this respect, inspections may be made from the planning right up to the completion and also thereafter, e.g. during the entire service life.

In order to come to such a statement, every inspection is decisively based on the expert interpretation and final evaluation of all the established results.

Particularly whenever the comprehensive expert evaluation is included also according to general criteria, e.g. in the form of expert reports, the customers appreciate the extensive competence of GSI's employees.

Inspection personnel 

Our inspectors are regularly called to our customers in order to solve the most diverse problems for them with innovative approaches. Thus, extensive monitoring and testing measures are taken efficiently with the utilisation of ultramodern testing technology. 

Not only qualified personnel, e.g. welding coordinators according to IIW/EWF guidelines, but also personnel on Levels 2 and 3 according to EN ISO 9712 for non-destructive tests or also FROSIO-certified coating inspectors are deployed depending on the order. 

Of course, additional engineers from the fields of materials and corrosion science, corrosion protection, process engineering or also dimensioning are available to the inspectors for support purposes in order to interpret and assess the established data.

Inspection activities

  • Checking of
    • Tender documents and performance specifications
    • Products according to supply specifications
    • Welding procedure specifications (WPSs/WPQRs)
    • Corrosion protection procedure specifications
  • Conducting of
    • Procedure qualification tests and drafting of the report
    • Operator qualification tests and welder qualification tests
  • Measurement of
    • Forces and electrical parameters
    • Mechanical stresses / deformations (strain gauge method)
  • Calibration of power sources
  • Construction/fabrication monitoring measures
  • Structure inspections/integrity
  • Initial tests (ITTs) / initial specimen tests
  • Supplier audits
  • Process technologies
  • Materials investigations
  • Materials acceptances as an independent body for 3.2 acceptance test certificates according to EN 10204 or as an individual test according to customer specifications
  • Damage investigations
  • Expert reports  

Independence and impartiality

As an independent institute, GSI offers a wide spectrum of the most diverse inspection activities.

Due to the independence, our inspections are basically rated as impartial. Thus, we can render our services as an Inspection Body A with reference to EN ISO IEC 17020.

your contact

Contact person

SLV Fellbach