specifically governs the selection of materials for piping systems, valves, flanges, and fittings used in offshore and onshore facilities on the Norwegian Continental Shelf. The most current version widely referenced today is NORSOK L-001:2021 (edition 4).
Even experienced engineers fall into these traps: norsok l-001 pdf
The NORSOK L-001 standard is intended for use by: specifically governs the selection of materials for piping