Offshore & Marine Pipes
Super duplex, copper nickel, and nickel alloy pipe solutions for FPSOs, offshore platforms, shipbuilding, and desalination plants — class-approved, seawater-rated, and fully traceable.
Super Duplex & Copper Nickel Pipes for Marine & Offshore
Very few environments are as grueling for a pipe than the ocean. Saline water, continuous exposure to chlorides at variable temperatures, and the pressure of service place demands on the materials that hands down! Metinox Overseas has produced a complete line of pipe and tube products specifically for the offshore platform, subsea systems, and marine infrastructure coupling the durability of materials that can withstand extreme diversions. In addition, we source our materials directly from the manufacturer to ensure that every one of our materials will withstand the extreme offshore application. Tank materials made with Duplex and Super Duplex material give us the ability to create vessels that can withstand the pitting and cracking associated with the severe marine conditions in which they are used. Nickel alloys, specifically Inconel 625 and Incoloy 825, are used to withstand highly aggressive, sour-service applications.
To ensure efficient, cost-competitive solutions are available to support challenging projects, we partner with our customers including end-users; engineering companies; EPC contractors; and equipment producers. By matching the correct material selection to the application, platform piping, seawater system piping, riser piping; heat exchangers; structural piping, and so on, we work to provide the best possible reliability in some of the highest cost areas of failure.
Key Applications & Grade Rationale
Key Applications
- Seawater cooling systems on FPSOs, semi-submersibles, and drillships
- Seawater injection lines for reservoir pressure maintenance (HP/HT service)
- Ballast water treatment system (BWTS) piping per IMO D-2 standard
- Fire suppression and firewater mains on offshore platforms
- Subsea manifolds, Christmas trees, and jumper piping
- Desalination plant evaporator tubes and brine circuits
- Ship hull and bilge piping, stern tube assemblies
- Offshore platform process piping and utility distribution headers
Why These Grades?
Recommended Products & Grades
| Product | Recommended Grades | Ideal Application |
|---|---|---|
| Super Duplex Pipes | UNS S32750, UNS S32760 | Seawater injection, firewater mains, subsea flowlines |
| Duplex Steel Pipes | UNS S31803, UNS S32205 | Topside utility, amine unit, produced water treatment |
| Copper Nickel Pipes | 90/10 (C70600), 70/30 (C71500) | Seawater cooling, condenser/HX tubes, ship piping |
| Inconel 625 Pipes | Alloy 625, Alloy 825 | Subsea wellheads, HPHT risers, clad pipe liners |
| Monel 400 Pipes | Alloy 400 | Seawater strainer housings, pump shafts, valve trim |
Key Benefits
Class Society Approved Mills
ABS, LR, DNV, BV mill-endorsed MTCs — class-approved source documentation for every shipment.
Super Duplex Full Test Pack
Ferrite content, PREN verification, and Charpy impact test documentation supplied as standard.
CuNi Seawater Certified
Copper nickel pipes per ASTM B466 with seawater corrosion test certificates for marine service.
Offshore-Ready Packing
Wooden cradles, nitrogen purging, and end protectors for safe sea freight to any port worldwide.
Why Metinox Overseas — FAQs
Why Metinox Overseas?
- Class society approved mill sources — ABS, LR, DNV, BV mill-endorsed MTCs
- Super duplex pipes supplied with ferrite content, PREN, and impact test data
- CuNi pipes per ASTM B466 with seawater corrosion test certificates
- Established supply track record to Lamprell, L&T, SapuraKencana, NMDC
- Offshore packing: wooden cradles, nitrogen purging, end protectors for sea freight
Sourcing Pipes for an Offshore Project?
Class-approved, expedited supply with full traceability documentation for marine environments.