M-501 Surface preparation and protective coating (Rev. 5, June 2004)

This NORSOK standard gives the requirements for the selection of coating materials, surface preparation, application procedures and inspection for protective coatings to be applied during the construction and installation of offshore installations and associated facilities.

This NORSOK standard cover both paints, metallic coatings and application of spray-on passive fire protective coatings.

• The aim of this NORSOK standard is to obtain a coating system, which ensures
• optimal protection of the installation with a minimum need for maintenance
• that the coating system is maintenance friendly
• that the coating system is application friendly
• that health, safety and environmental impacts are evaluated and documented

This NORSOK standard is not applicable to pipelines and pipeline risers.

The main changes included in this revision are that:

• ISO 20340 has been adopted as pre-qualification test standard for coating systems
• fire testing of aged spray-on passive fire protection has been introduced
• minimum requirements with respect to coating products, number of coats and coating thickness have been introduced also for coating systems that shall be pre-qualified
• DNV classification testing has been accepted as an alternative qualification method for ballast water tank coatings (coating system no. 3B).

Other changes and modifications are also made. All main changes are highlighted with revision marks.

Task Force
A task force has been established by NORSOK Expert Group Materials (EG M) to review the performance in the use of polysiloxane top coats. Information can be downloaded below.