What class society approvals apply to marine HVAC duct?

Marine and offshore HVAC ductwork is subject to class society approval by ABS (American Bureau of Shipping), DNV (Det Norske Veritas), Lloyd's Register, Bureau Veritas (BV), ClassNK, RINA, KR (Korean Register). Each class society has type approval requirements for HVAC components: fire dampers, smoke dampers, duct construction, fan components. The HVAC fabricator (using SBKJ machinery) operates under quality system witnessed by the relevant class society. Type approval is the gate to selling into commercial ship and FPSO projects.

What materials are required for marine atmosphere duct?

316L stainless steel is the minimum specification for marine atmosphere supply duct due to chloride attack on lower-grade materials. Cu-Ni 90/10 (cupronickel) is specified for some marine cooling water HVAC applications and on naval surface ships where biofouling resistance matters. FRP (fibre-reinforced plastic) composite for some weight-sensitive offshore platform applications. Galvanised G275 acceptable only for accommodation interior far from external atmosphere. Aluminium 5083/5086 for some weight-sensitive naval applications.

How does SBKJ support the AUKUS submarine programme?

AUKUS (Australia-UK-US trilateral security partnership) submarine programme is the largest defence industrial undertaking in Australian history, with submarine build at Henderson WA (Civmec, Austal, BAE Systems Australia) and Adelaide SA (ASC). Submarine HVAC requires extreme tolerances, atmospheric monitoring, air revitalisation (CO2 scrubber, O2 generation), confined space ventilation, magnetic signature management. SBKJ machinery (in 316L stainless variant) is the standard fabrication equipment for surface ship and submarine accommodation duct, engine room ventilation and equipment cooling at Australian shipyards supporting the AUKUS programme.

What HVAC scope does SBKJ cover for FPSO and FLNG?

FPSO (Floating Production Storage and Offloading) and FLNG (Floating Liquefied Natural Gas) projects carry massive HVAC scope: process module HVAC (gas conditioning, separators, compressor modules), accommodation block HVAC (typical 100-200 person crew accommodation), helideck heating and ventilation, machinery space ventilation, cargo offloading control room HVAC. SBKJ machinery in 316L stainless variant for the marine atmosphere is the typical specification for FPSO/FLNG accommodation block. Process module HVAC (with ATEX/IECEx hazardous area zones) requires separate specialist fabricators.

Which Australian offshore projects use SBKJ ductwork?

Australian offshore HVAC scope includes: Bass Strait operations (ExxonMobil, Esso), Northwest Shelf (Woodside, INPEX, Chevron Gorgon, Wheatstone), Bonaparte Basin, FLNG (Prelude Shell, Ichthys floating offload), proposed Beach Energy Otway Basin expansion. SBKJ machinery is installed at multiple Australian shipyards and offshore module fabricators supplying these projects. Henderson WA shipbuilding precinct (Civmec, Austal, Luerssen Australia, BAE Systems Australia) is the home of Australian shipbuilding.

What about cruise ship HVAC?

Cruise ship HVAC has unique drivers: passenger comfort across multiple climate zones, infectious disease control (post-COVID enhanced filtration and outside air rates), galley exhaust per IMO MSC.1/Circ.1166, accommodation noise criteria (NC-25 typical for staterooms). Major cruise builders (Fincantieri Italy, Meyer Werft Germany, Chantiers de l'Atlantique France) use SBKJ machinery at HVAC fabricator partners. SBKJ 316L stainless variant typical for cruise ship duct due to marine atmosphere combined with high humidity from pool/spa areas.

How do shock and vibration requirements affect duct fabrication?

Naval ducts must withstand shock loading per MIL-S-901D (US) or NES 700 (UK) - typically 10-50g shock acceleration depending on equipment grade. Vibration tolerance per MIL-STD-167 or ISO 20283-2. Construction implications: thicker gauge (1.5-2.0 mm typical for naval vs 0.6-1.0 mm commercial), additional support hangers, welded longitudinal seam preferred over Pittsburgh-lock for shock-rated zones, special fastener selection. SBKJ machinery in heavy-gauge configuration handles naval-spec construction; the welded longitudinal seam is added by orbital TIG welding station.

What is the lead time for marine project HVAC equipment?

Marine project lead times are driven by shipyard schedule discipline. Naval shipbuilding: 4-7 year build cycles with HVAC fitout in years 2-4. Commercial shipbuilding: 18-30 month build cycles. FPSO/FLNG: 36-60 month build at fabrication yard plus 6-12 months commissioning at operating site. SBKJ machinery procurement plan: 90-120 days build at production facility, 22-30 days sea freight Melbourne to Australian shipyards (Henderson WA, Adelaide SA, Newcastle NSW) or to international shipyard locations, 5-10 days commissioning.

Industries

HVAC Duct Machinery for Marine and Offshore Projects

316L stainless and Cu-Ni 90/10 SBAL-V auto duct lines, SBTF spiral tubeformers and welded duct fabrication equipment for marine and offshore projects: naval shipbuilding (AUKUS submarine programme, Henderson WA precinct), commercial shipping, cruise ships, FPSO and FLNG accommodation, offshore oil platforms. Class society approval (ABS, DNV, Lloyd's, BV, ClassNK), IMO MSC.1/Circ.1166, IEC 60079 hazardous area HVAC.

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Marine and offshore HVAC at a glance

Marine and offshore ductwork must survive saltwater spray, motion (pitch/roll/heave), vessel space constraints, fire and explosion safety per SOLAS, weight optimization for performance, and class society type approval. 316L stainless steel is the minimum specification for marine atmosphere supply duct; Cu-Ni 90/10 cupronickel and FRP composite are used for specific applications.

The Australian context is dominated by the AUKUS submarine programme (the largest defence industrial undertaking in Australian history), Henderson WA shipbuilding precinct (Civmec, Austal, Luerssen Australia, BAE Systems Australia), Adelaide SA (ASC submarine build), and the Northwest Shelf offshore programme (Woodside, INPEX, Chevron Gorgon, Wheatstone, Prelude Shell FLNG). Combined, AUD 30+ billion of active marine HVAC scope through 2035.

Marine and offshore facility types

Commercial shipping: Cargo, container, tanker, LNG carrier, bulk carrier.
Cruise and ferry: Passenger comfort, infectious disease control, galley exhaust.
Naval surface: Warship, frigate, destroyer, NBC protection, magnetic signature.
Submarine: Atmosphere monitoring, CO2 scrubber, O2 generation, extreme tolerance.
Offshore oil platform: Process module, accommodation, helideck, ATEX/IECEx zones.
FPSO and FLNG: Floating production with massive accommodation + process module HVAC.
Jack-up rig and drillship: Drilling support, mud system, mud lab.

SBKJ machinery for marine projects

SBAL-V auto duct line (316L stainless variant): The standard for naval shipbuilding accommodation, surface ship engine room ventilation, FPSO accommodation block, cruise ship cabin supply.
SBAL-V (heavy-gauge naval variant): 1.5-2.0 mm gauge for shock-rated zones requiring MIL-S-901D compliance.
SBTF spiral tubeformer (316L stainless): Round duct for marine atmosphere applications.
Orbital TIG welding station: Welded longitudinal seam for shock-rated naval ducts.
TDF flange former: Tight-leakage SMACNA Class A flange for pressurised compartment supply.

Reference projects and AUKUS context

The Australian AUKUS submarine programme will deliver up to 8 nuclear-powered conventionally-armed submarines starting with Virginia-class (US-built initially, then Australian-built) and progressing to SSN-AUKUS class (Australian-built at Henderson WA and Adelaide SA). HVAC duct demand is unprecedented for Australian shipbuilding.

Henderson WA shipbuilding precinct hosts: Civmec (Defence Capability Manual partner), Austal (offshore patrol vessel and US Navy contracts), Luerssen Australia (Arafura-class offshore patrol vessels), BAE Systems Australia Henderson (Hunter-class frigate construction), and the planned Western Australian Defence Industry hub. Adelaide SA hosts ASC (Australian Submarine Corporation) at Osborne, BAE Systems Australia Adelaide (Hunter-class frigate), and the SSN-AUKUS construction yard.

The Australian Northwest Shelf and Bass Strait offshore programme adds: Woodside North Rankin and Goodwyn platforms, INPEX Ichthys floating production, Chevron Gorgon and Wheatstone, Shell Prelude FLNG (the world's largest floating LNG facility), ExxonMobil Bass Strait Esso Longford. SBKJ machinery is installed at fabricators serving all of these.

Marine & shipbuilding HVAC duct machinery across Australia

Locations SBKJ serves: Perth, Adelaide, Cairns, Newcastle, Hobart, Western Australia, South Australia.

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