Welding is a critical process and demands great skill. If welding is not done perfectly, it can pose great risks for humans and the environment.

Welding requires expert and competent craftsmanship. International standards developed for welding processes and welders form the foundation for the various certification schemes. Only certified welders shall perform these processes and welds. DNV offers the certification of welders according to the following standards:

• NEN-EN 287-1
• ISO 9606 serie
• ASME IX
• AWS

In addition to the certification of welders, DNV offers the certification of officers responsible as quality inspectors: the welding coordinator and the visual welding inspector.

1. Welding Coordinator
   Certification is based on the international standard EN-ISO 3834 and has two variants:
   • International Welding Coördinator: relevant for all industry sectors where quality of the welding process and welds must be ensured.
   • Welding Coordinator for non-static stressed constructions: less generic than the International Welding Coordinator and specifically relevant within companies producing steel constructions.

2. Visual welding inspector
   The certification of the visual Welding Inspector, also referred to as the Visual Tester, is based on the international standard NEN-ISO 9712 and EN 473. The certified Visual Welding Inspector is competent to perform visual inspection (non-destructive) on connection based on melted welts according to defined procedures (standards) and work instructions (WPS).
   DNV offers two certification levels for the visual welding inspector:
   • VTW-1: This visual welding inspector works under the supervision of the certified visual welding inspector level 2.
   • VTW-2: This visual welding inspector works independently and provides the required reports.

DNV has appointed examination institutes and/or approved examiners that offer the certification tests under our supervision:

• Bodycote Materials Testing BV, Kapitein Nemostraat 12, 7821 AC Emmen, tel. 0591-618555

• Lastechniek Europa bv, Pascalbaan 1, 3439 MP Nieuwegein, tel. 030-6008340

• i-Cert, Theemsweg 4, Havennr. 5101, 3197 KM Botlek-Rotterdam, tel. 0181-290933

• Multicert, Voordijkshoorn 119, 2635 JW Den Hoorn, tel. 015-2577287

• Rail OK BV, Zwaansweg 9, 4247 EX Kedichem, tel. 0183-564924

• Schielab Breda V.o.F., Voorerf 18, 4824 GN Breda, tel. 076 542 43 00

• Schielab B.V., Schippersstraat 35, 9641 HV Veendam, tel. 0598-350855

• Stork FDO Inoteq B.V., Tsaar Peterstraat 229, 1018 PL Amsterdam, tel. 020-5563555

• Lastechnisch Adviesburo A. Verduyn, Kerkweg 50, 4255 GD Nieuwendijk, tel. 0183-401636