Download the certificates held by Deprest here

Deprest has the following experts in-house:

  • 2x International Welding Engineer (IWE)
  • International Welding Technologist (IWT)
  • International Welding Specialist (IWS)

Our people can also perform Penetrant Testing (PT) in-house, for more info click here.


Deprest is certified compliant with the

Management and quality:


Technical certificates (welding, construction, pressure vessels)

  • ISO 3843-2 
  • AD2000 HP0
  • EN 1090-2 up to EXC3 (incl. welding) and EXC4 (initial processing) for steel and stainless steel structures; also EN1090-3 with same execution classes for aluminium structures.
  • Approved to carry out projects for De Watergroep
  • Approved to build tanks according to API
  • Approved to make pressure vessels according to PED, ASME, EN13445 and Vlarem II for chemistry, petrochemical, oil & gas, nuclear, pharmaceutical and industry.