Technical guides
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Ball valve or butterfly valve: how to choose for a seawater system
Ball or butterfly valve on a seawater system: pipe size, isolation or throttling, wafer or lug mounting, materials, seals and shipboard rules.
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Bronze, brass, 316 stainless steel or copper-nickel: which material for seawater?
Dezincification of brass, crevice corrosion of 316 stainless, galvanic couples: choosing the right material for valves, fittings and pipe in seawater.
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EN 10204 3.1 and 3.2 certificates and classification society type approval
Who signs an EN 10204 3.1 or 3.2 certificate, how it differs from Lloyd's, BV, RINA or DNV type approval, and what to specify on the purchase order.
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Choosing a seawater intake and through-hull fitting: material, thread, seacock, hose and clamps
Bronze, stainless or brass, BSP threads, seacock, hose tail, hose and clamps: what to check, part by part, on a seawater intake below the waterline.