Marine & Offshore

Ships and offshore equipment live under heavy salt spray, humidity and galvanic corrosion, and the wrong marine fasteners rust fast, fatigue and crack — a real safety hazard. The worst case is mixed stainless/carbon-steel assemblies on deck fittings, hatch covers and lifeboat davits: after years of seawater wash-down, galvanic corrosion seizes the joints solid, making them nearly impossible to remove during service. Even 316 can pit and crevice-corrode once salt-loaded debris and fouling sit in tight gaps (PREN ≈ 25 versus ≈ 35 for 2205), galvanic attack is far more aggressive where seawater piping meets copper-alloy valves or aluminium anodes, and warmer tropical waters push corrosion rates higher still. JIALI supplies 316 (A4) stainless and 2205 duplex marine stainless steel screws, bolts, nuts, washers and stud bolts, with same-alloy pairing advice, isolating gaskets for dissimilar metals and anti-galling compound recommendations, plus Dacromet and passivation finishes validated by ASTM B117 salt-spray and ASTM G48 pitting testing — class-society material certificates and batch traceability available, a reliable Hong Kong supplier of marine fasteners and offshore hardware supporting drawing-based custom and batch supply.

Typical Applications

• Hull deck & cabin structural joints
• Propeller shaft & steering-gear compartment
• Ballast tanks & seawater piping flanges
• Offshore platforms & leg attachments
• Ports, quay cranes & lifting equipment
• High salt-spray railings & gangways
• Lifeboat davits & mooring winch connections
• Fish-raft & floating aquaculture installations
• Offshore wind transition pieces & tower connections
• Yacht masts, rigging & deck hardware

Recommended Products

For "Marine & Offshore" conditions we stock matching material and standard fasteners. Tell us your application and we help select:

• 316 / 2205 Stainless
• Stainless Bolts
• Threaded Rods & Stud Bolts (flange sets)
• Stainless Nuts
• Washers & Rings (incl. isolating gaskets)

Common Standards & Materials

316 (A4, ISO 3506 / GB/T 3098.6), 2205 duplex (S32205, ASTM A276), corrosion-resistant stud bolts (ASTM A193 B8M / A320 B8M for low-temperature service), Dacromet and passivation per ASTM A967, ASTM B117 salt-spray and ASTM G48 ferric-chloride pitting tested; marine flange joints per GB/T 2501 / JIS marine-hardware specs; EN 10204 3.1 material certificates and batch traceability available for CCS / DNV / ABS / LR class-society approvals, per ISO 3506, DIN and GB marine & offshore anti-corrosion requirements.

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