Shipyards and offshore platforms need class-approved valves, seawater-resistant SS316 and bronze fittings, and heavy-duty bilge and fire pumps — equipment that has to survive continuous immersion and pass a class society survey, not just a hydrostatic test. We document every line item to class society requirements (DNV, ABS, LR) with end-to-end material traceability.
Each requirement below drives a specific material, design or documentation choice — miss any and the item fails inspection, or fails in service.
SS316 pits under continuous seawater immersion over years — it is not the final answer, only a slower-failing one. Super-duplex (ASTM A890 5A/6A), naval bronze, or copper-nickel are specified for sea chests, overboard discharge and any component with permanent wetted exposure.
Super-duplex · Bronze · Cu-NiA valve or pump without DNV, ABS or LR type approval cannot go on a classed vessel or platform regardless of how well it is built — the certificate, not the component, is what the surveyor checks. Type approval has to be confirmed by product line before quoting, not assumed from a general "marine-grade" label.
DNV · ABS · LRSOLAS mandates specific fire main and bilge pump capacity and valve arrangements that vary by vessel class and tonnage — getting the pump curve or valve count wrong fails the survey, not just the spec sheet. Fire and bilge pump packages are quoted against the vessel's actual SOLAS category.
SOLAS fire & bilgeHull-borne vibration and the shock loading of heavy seas exceed what industrial-duty valves and pump mounts are rated for. Marine-qualified items carry documented vibration and shock test records, not just a pressure-test certificate.
Vibration / shock testedFeed the working condition into the selector below and the bundle in the next section is what a compliant spec resolves to.
Bronze and SS316 valves cover the majority of sea-chest, ballast and general service isolation duty at a cost well below super-duplex, reserving the higher alloy for continuous-immersion components only.
Bilge pumps are sized against SOLAS-mandated bilge capacity for the vessel's tonnage class — not a generic flow/head selection — because survey sign-off checks the capacity number directly.
Fire pumps match the vessel's SOLAS fire-main category; electric or diesel drive is selected based on the vessel's emergency power arrangement.
Class type approval (DNV/ABS/LR) travels with each item as a document, confirmed against the vessel's classification society before the order is placed — this is what the surveyor actually checks, not the component spec sheet.
| Parameter | Typical range | What we select | Driver |
|---|---|---|---|
| Pressure class | PN10 – PN25 | PN16 typical sea-chest & ballast duty | System design pressure |
| Body material | Bronze / SS316 / Super-duplex | Bronze general service; super-duplex continuous immersion | Exposure duration & chloride level |
| Class approval | DNV / ABS / LR | Confirmed per vessel's classification society | Survey & registration requirement |
| Pump sizing | Per SOLAS category | Bilge & fire pumps sized to SOLAS capacity | Vessel tonnage & fire-main category |
| Vibration / shock | Marine-qualified | Documented test record supplied | Hull-borne vibration & sea-state shock |
| Material cert | 3.1 / 3.2 | EN 10204 3.2 for class-registered items | Class society documentation requirement |
The six line items below are what a typical package resolves to. Request the bundle as one RFQ — we quote, consolidate and ship under a single bill of lading, with documentation matched across all items.
| Line | Item | SKU | Key spec | Material | |
|---|---|---|---|---|---|
| 01 | Bronze Seawater Ball Valve — sea chest & general service isolation | PF-BV-BRZ-DN50 | DN15–DN100, PN16, class-approved | Naval bronze | Details → |
| 02 | SS316 Gate Valve — ballast line isolation | PF-GV-316-DN100 | DN50–DN300, PN16, class-approved | SS316 | Details → |
| 03 | Super-Duplex Check Valve — continuous-immersion backflow prevention | PF-CV-SD-DN80 | DN50–DN200, PN16 | Super-duplex 2507 | Details → |
| 04 | Cast Iron Bilge Pump — SOLAS-rated bilge transfer | PF-BP-CI-SOLAS | capacity per SOLAS category, self-priming | Cast iron / bronze impeller | Details → |
| 05 | Electric/Diesel Fire Pump — fire main duty per SOLAS | PF-FP-ED-SOLAS | capacity & head per fire-main category | Cast iron / SS trim | Details → |
| 06 | Flange & Gasket Set — seawater joint sealing | PF-FL-SS-MAR | DN15–DN300, class-approved | SS316 / graphite gasket | Details → |
Each item ships with the certification its destination and standard demand. See the full material selection guide for body/seat alloy detail across all categories.
| Standard | Scope | Where it applies in this bundle |
|---|---|---|
| DNV | Det Norske Veritas type approval | Valves & pumps for DNV-classed vessels/platforms |
| ABS | American Bureau of Shipping type approval | Valves & pumps for ABS-classed vessels/platforms |
| LR | Lloyd's Register type approval | Valves & pumps for LR-classed vessels/platforms |
| SOLAS | Safety of Life at Sea — bilge & fire main requirements | Bilge pump & fire pump sizing (lines 04, 05) |
| EN 10204 3.2 | Third-party witnessed material certificate | Class-registered items per heat/lot |
A shipyard building a mid-size commercial vessel needed the bilge and fire main valve and pump package sourced and documented to the vessel's classification society ahead of the survey date.
Scope: bronze and SS316 seawater valves for sea-chest and ballast isolation, a SOLAS-sized bilge pump, a fire pump matched to the vessel's fire-main category, and class-approved flange/gasket sets for the seawater piping.
Each item's type-approval certificate was matched to the vessel's classification society before the order was placed, and EN 10204 3.2 material certificates were supplied per heat so the yard's QA package was complete ahead of the class survey.
Class type-approved · EN 10204 3.2 · survey-ready documentation
The same checks our engineers run before quoting a package for this duty.
One RFQ covers every item in this solution. We select, price and consolidate the bundle, and reply within 12h in EN / RU / ES / AR.