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Certification of materials and components

Certification of Materials and Components


DNV GL is your trusted and reliable partner for certification of material and components, and we provide a strong technical expertise that gives you a decisive advantage.

The new DNV GL rules and Class Programs will provide the basis for our certification services in the future. They are the result of our combined expertise and experience, and aligned with industry standards and practices.

In a transition period, DNV GL will operate with three rule sets:

  • DNV GL rules
  • DNV rules
  • GL rules

Acceptance of certificates across rule sets


Certification of materials and components is in general to be in accordance with the applied rule set for the project. The Society may, subject to a case by case assessment, accept certificates and approvals issued according to any of the rule sets.

The following certificates will, on a general basis, be accepted for use with all rule sets published by DNV GL:

  • Service supplier certificate of approval
  • Approval of manufacturer certificates
  • Type approval certificates

With respect to the acceptance of type approval certificates on vessels with an applicable rule set different from that of the Type Approval certificate, please click here for limitations.

Product and material certificates (VL) based on DNV GL ship rules will be accepted for use on projects having DNV or GL ship rules as the applied rule set with the conditions given in DNV GL General Regulations.

Please refer to the rules DNVGL-RU-0050 General Regulations for more details.

Information flyers

Please find below information flyers containing more detailed information on our certification services: