Oil and Gas Nickel Alloy Scrap
Source industry
Oil and gas is the largest source of corrosion-resistant nickel alloy scrap: Inconel 625 clad and solid pipe, Incoloy 825 tubulars, Inconel 718 and 925 downhole parts, Monel K-500 tools and duplex piping. Decommissioning and shutdowns release it in large volumes.
Background
Why Oil and Gas Uses Nickel Alloys
Oil and gas equipment faces hydrogen sulfide, chlorides, carbon dioxide and seawater at high pressure. Nickel alloys and duplex steels resist the resulting corrosion and cracking where carbon steel would fail.
Scrap is released at plant turnarounds, platform and pipeline decommissioning, and from machining of downhole tools and wellhead parts.
The chain
From Component to Scrap
Where the alloy served, which grades are used there, and the scrap that comes back.
Inconel 625, Incoloy 825
Pipe offcuts and decommissioned lines
Inconel 718, Incoloy 925, Monel K-500
Bar ends, turnings, retired tools
Duplex 2205, super duplex 2507 and S32760, 254 SMO
Pipe, fittings and valves
Monel 400
Piping, vessels and exchangers
Hastelloy C-276, Incoloy 825
Exchangers and piping
Grades
Grades from This Industry
Open a grade for its composition, identification and standards.
| Grade | Typical use in this industry |
|---|---|
| Inconel 625 | Offshore and subsea flowlines, clad and weld-overlaid pipe |
| Incoloy 825 | Sulfuric acid pickling and processing equipment |
| Inconel 718 | Jet engine discs, shafts, casings and rings |
| Incoloy 925 | Downhole tools and tubing hangers |
| Monel K-500 | Pump and propeller shafts |
| Duplex 2205 | Oil and gas process piping and manifolds |
| Super duplex 2507 | Seawater injection and firewater piping |
| Monel 400 | Marine fittings, seawater valves and pumps |
Standards
Standards Behind This Scrap
Sour-service equipment is governed by NACE MR0175 / ISO 15156, and alloy 718 and 925 components are often supplied to API 6A718 and API 6ACRA. Line pipe, clad pipe and process piping are usually ASTM/ASME: B444 and B705 for 625, B423 for 825, A790 and A928 for duplex.
Before you sell
Things to Know
Clad and weld-overlaid pipe is common in this industry and must be declared: its alloy content is a small share of its weight.
Questions
FAQ
What happens to nickel alloys when an offshore platform is decommissioned?
Topsides and subsea equipment are cleaned, cut and sorted onshore. Nickel alloy and duplex piping is segregated from carbon steel and sold by grade.
Is sour-service scrap safe to handle?
Once it has been cleaned and decontaminated, yes. Material from sour service must be free of residues before it is shipped, and many buyers ask for a written declaration.
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