What We Do

Superyacht fuel tanks are not a catalog item. Every vessel has a different bilge geometry, different fuel capacity requirements, and different access constraints. We build tanks to fit the vessel — not the other way around. We've fabricated fuel systems for vessels from 40 feet to over 200 feet, in aluminum and stainless, for diesel and gasoline service.

Custom aluminum fuel tank fabrication — marine-grade 5086 or 5052 aluminum, any size or shape, baffled to ABYC standards
Stainless steel tank fabrication — 316L stainless for installations where aluminum is unsuitable or aesthetic requirements demand it
Integral baffle systems — baffling to ABYC H-33 requirements preventing fuel surge and maintaining structural integrity
Pressure testing — every tank pressure-tested before leaving the shop; test certificate provided
Tank inspection & assessment — non-destructive evaluation of existing tanks: visual, ultrasound thickness measurement, internal inspection
Tank repair & weld repair — isolated weld repairs on serviceable tanks: seam repairs, fitting replacements, crack repair
Full tank replacement — remove existing tanks, template new builds to the same or upgraded configuration, install and commission
Diesel day tanks & transfer systems — day tanks, header tanks, and multi-tank manifold systems for complex superyacht fuel arrangements

Why DolFab for Superyacht Fuel Tanks

Pressure-Vessel Qualified Welders

Our welders hold pressure-vessel qualifications — the same standard required for tanks, hydraulic manifolds, and high-pressure systems. Every seam is inspected in process, not just at final test.

Exactly-to-Fit Fabrication

We template the bilge space before cutting a single piece of metal. Tank geometry, fitting positions, access panel locations, and mounting provisions are all designed around your vessel — not a catalog drawing.

USCG / ABYC Compliance

Tanks built to ABYC H-33 and applicable USCG standards. Documentation package for surveyors and insurance underwriters included with every new-build tank.

Full In-House Capability

CNC waterjet cutting for precision plate work, press brake for forming flanges and mounting provisions, TIG welding for all seams — nothing subcontracted.

Aluminum vs. Stainless: Which Tank for Your Vessel?

The right material depends on the vessel's construction, fuel type, and service environment. Here's how to think about it.

Aluminum — The Default for Most Superyachts

Best for aluminum-hulled superyachts — eliminates galvanic corrosion risk

Lower weight — significant at fuel capacities of 5,000–50,000+ gallons

ABYC-preferred material for gasoline service tanks

Alloys: 5086 (marine structural) or 5052 (forming-intensive shapes)

Stainless — When Specified or Required

For steel-hulled superyachts — avoids galvanic pairing with aluminum tanks

Better for visible engine room installations where aesthetics matter

Day tanks and header tanks where easy inspection is required

Grade: 316L marine stainless — more corrosion-resistant than 304 in marine environments

Not sure which is right for your vessel? Call us at 954-941-5093 — we'll give you a straight answer in 5 minutes.

Related Work From Our Portfolio

330ft Superyacht Nika D engine room fabrication

330' Superyacht Nika D

Engine room metalwork and diamond plate flooring on one of the largest vessels ever serviced in Fort Lauderdale.

75ft Burger Yacht complete hull and systems refit

75' Burger Yacht Refit

Complete structural restoration including below-deck metalwork and fuel system components.

Baglietto 80ft yacht refit Fort Lauderdale

80' Baglietto Yacht Refit

Major refit including structural metalwork on a classic Italian motor yacht.

View all 15 portfolio projects

Get a Fuel Tank Quote

Tell us the vessel, the fuel type, the capacity you need, and whether this is a new build or replacement. We'll come to the boat for a template visit before committing to a number.

Request a Quote 954-941-5093