This service specification describes DNV GL’s certification scheme for qualifying manufacturers of special materials as defined in NORSOK M-650 for the petroleum, petrochemical and natural gas industries. It also outlines how DNV GL acts as a qualifying company.

Key objectives of this service specification are:

• To ensure quality by defining the competency of the person responsible for the certification
• To ensure the consistent delivery of NORSOK M-650 qualifications
• To provide recognizable deliverables to document compliance with NORSOK M-650.