In the global oil and gas industry, the phrase "used equipment" often triggers alarm bells. For decades, the default engineering mindset has been "new is safe." However, on the Norwegian Continental Shelf (NCS), a revolutionary standard has challenged this dogma. That standard is NORSOK R-001.
| Material class | Typical use | Restrictions | |----------------|-------------|--------------| | Carbon steel (CS) | General process, utility | Sour service requires HIC/SSC testing per NACE MR0175/ISO 15156 | | Low-temp CS (e.g., 09Ni) | Low temperature | Impact test at MDMT -46°C | | Austenitic SS (316L) | Non-sour, clean service | No chlorides > 50 ppm if > 60°C (pitting risk) | | Duplex (22Cr, 25Cr) | Sour, seawater, CO₂ | Must meet NORSOK M-120 (ferrite control 35–65%) | | Alloy 625 (clad/overlay) | Severe sour, high temp | Weld overlay minimum 3 mm final thickness | norsok r001
Documentation: Clear documentation for design loads, noise, and cleaning/preservation is essential. ⚖️ R-001 vs. International Standards NORSOK R-001: The Ultimate Guide to Mechanical Equipment