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NORSOK M-001 is revised and on public enquiry

The NORSOK standard on material selection has been reworked, and has become an independent standard, no longer based on ISO 21457:2010. Several changes have been made to the standard, and we invite the industry to review and comment on the standard by 12 December.

Published
Welders welding a wide metal pipe
Photo: iStock

NORSOK M-001 was last published in 2014, and concerns hydrocarbon production and processing facilities and supporting systems for fixed offshore installations including subsea production systems. The document also applies for onshore terminals, except for structural and civil works.

The basis for material selection and corrosion protection described is minimum 20 years design life.

NORSOK M-001 gives guidance and requirements for

  • material selection and corrosion evaluations
  • specific material selection where appropriate
  • corrosion protection and corrosion control
  • design limitations for specific materials
  • qualification requirements for new materials or new applications

Comments on the enquiry draft

You can read the draft called "prNORSOK R-005:2023" through our official enquiry portal.

Through the enquiry portal, you can leave your comments for each specific section of the draft. 

To access the draft, you will need to sign into the enquiry portal. New users will need to register. You can do this at the bottom of this page: Kommentere.standard.no

If you have a registered user, you can access the draft here: prNORSOK M-001

Deadline: 2024-12-12

Main changes to the standard

NORSOK M-001 has been reworked to become an independent standard, no longer based on ISO 21457:2010. 

These are the main changes included in this edition:

New clause division to highlight:

  • Principles for material selection
  • Corrosion evaluations
  • Corrosion mitigation
  • Corrosion management

New subclause on Material selection report:

  • A material selection report shall be prepared.
  • Mandatory requirements for the report are stated.    

New subclauses under Corrosivity evaluations in hydrocarbon systems:

  • O2 contamination
  • Cracking in H2S environment
  • effect of Hg
  • MIC 

New subclauses under Corrosion evaluations:

  • Stabilized and export oil
  • Dry gas 
  • Injection systems
  • Utility systems

Subclause on Use of coatings has been significantly reworked:

  • All carbon steel surfaces shall be coated unless under cathodic protection.
  • Coating is required for all piping in 316SS, not only for hydrocarbon systems.
  • Even if coated, 316 SS shall not be used above chloride SCC temperature limit.

Subclause on Galvanic corrosion prevention has been significantly updated.

Subclause on Corrosion and erosion allowance has been expanded to become an independent subclause. Calculation of CA for pipelines is moved to this subclause.

Subclause on Closed compartments is rewritten to include partly closed compartments.

Subclause on Chemical treatment has been expanded to become an independent subsection with new subclauses:

  • Qualification of chemicals
  • Material compatibility with production chemicals
  • Sand erosion

Clause on Material selection for specific applications have been reorganised and new subclauses are included:

  • Drilling equipment
  • Fresh water and potable water
  • Additional requirements for subsea components
  • Metallic seal rings

All material selection tables in Clause Material selection for specific applications have been updated and the recommendations on the use of 316 SS and FRP have been reduced.

Subclause on Well completion has been expanded to provide material recommendations.

Clause on Limitations for candidate materials have been reorganised and new subclauses are included:

  • H2S cracking
  • Seawater system
  • HISC due to cathodic protection in seawater
  • Polymeric materials 

All information on polymeric materials is gathered in one subclause including polymeric materials for sealing purposes and fibre reinforced polymers.

Subsections on Manufacturer qualification and Familiarisation programmes for fabrication contractors have been updated to include additive manufacturing.

Annex A Design basis has been updated.

Annex B has been rewritten and the illustrations improved.

A new informative annex describing testing of chemical compatibility with materials is included for metallic and non-metallic materials.

A new informative annex on Structural steels is included.

A new informative annex with Design recommendations to avoid HISC of Nickel alloys.

Read the draft in its entirety and leave your comments here: prNORSOK M-001

Contact us

For further detail, please contact project manager in Standards Norway, Espen Holm.