Gate Valves for Marine & Offshore
Marine and offshore applications subject gate valves to aggressive seawater corrosion, biofouling, vibration, and regulatory class society approval requirements — demanding bronze, duplex stainless, or Monel bodies with full traceability from DNV GL, Lloyd's Register, or ABS.
Key Applications — Gate Valves in Marine & Offshore
Seawater Cooling & Ballast Systems
Sea chest gate valves and main seawater cooling isolation valves on vessels and FPSOs use gunmetal (CuSn) or duplex stainless bodies to resist seawater corrosion — class society (DNV, LR, BV) approval required for all valves in international waters.
BS 5154, DN50–DN600, Naval Brass C83600 or Duplex 2205, flanged PN10/16, DNV GL or Lloyd's Register approval, impressed current corrosion protection compatible
Ballast Water Treatment Systems
Gate valves in IMO D-2 compliant ballast water treatment systems (BWTS) isolate filter units and UV/electrochlorination treatment modules — SS 316L for chlorine resistance in treated water.
ASME B16.34, DN100–DN400, SS 316L body and trim, OS&Y rising stem, IMO BWMS Code type approval, flanged ANSI or DIN
Fire Fighting & Foam Deluge
Fixed fire-fighting system (FFS) gate valves on offshore platforms and tankers isolate deluge sections — rated per SOLAS and NFPA 13, often bi-directional with stainless trim for saltwater foam solution.
NFPA 13, ASME B16.34, DN50–DN200, CS WCB or SS 316 body, OS&Y, UL/FM approved, red-coated for fire system identification
Diesel Oil & Fuel Oil Service
Gate valves on marine diesel fuel oil (DO/FO) service lines isolate main engines, generators, and emergency diesel units — carbon steel bodies with low-fugitive-emission stems per ISO 15848.
API 600, DN50–DN200, ASTM A216 WCB, full-bore, API 607 fire-safe optional, ISO 15848 Class B fugitive emissions
Offshore Topsides & Subsea Valve Trees
Topsides gate valves on FPSO and platform process modules isolate wellstream headers and production manifolds — sour-service NACE MR0175 trim for H2S-laden crude, API 6D and API 600 standards.
API 6D + API 600, Class 600–1500, ASTM A352 LCC or A350 LF2, NACE MR0175 hardness compliance, butt-weld BW ends, full-bore
Required Certifications
Recommended Materials
Selection Factors
Technical FAQs
What material should marine seawater gate valves be made of?
Do marine gate valves need class society approval?
What standards apply to offshore topsides gate valves for sour service?
Other Marine & Offshore Valve Guides
Gate Valves in Other Industries
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Gate Valves for Marine & Offshore
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