MARINE METAL FABRICATION ON THE GULF COAST

Pascagoula, Mississippi is home to Ingalls Shipbuilding — one of the largest shipbuilders in the United States — and JMC Fabrication sits in the same industrial corridor. AWS and NAVSEA certified, operating a 50,000 sq ft shop within the Gulf Coast's most concentrated marine fabrication geography, JMC serves shipyard accounts, marine contractors, and offshore clients with pipe spools, structural work, and custom fabricated assemblies that meet the documentation and certification standards marine buyers require.

NAVSEA certification is a prerequisite for a large segment of marine and shipyard fabrication work — and JMC holds it. Our welders are qualified for Navy and marine specification applications. AWS certification covers the broader range of marine structural and piping work. Material traceability, weld log documentation, and project closeout packages are standard practice on marine projects.

JMC's marine capabilities cover the core fabrication scope for shipyard and offshore clients:

• Pipe spool fabrication — AWS and NAVSEA certified, carbon steel and stainless steel
• HVAC and ventilation duct for marine and shipyard applications
• Structural components and custom assemblies
• Penetrations, flanges, and fittings for marine systems
• Custom weldments and equipment packages

JMC is positioned in Pascagoula's marine fabrication corridor. Our in-house engineering team can review customer-supplied isometrics, flag fabricability issues, and go directly to production — reducing the coordination lag that adds time to complex marine packages. Documentation and traceability meet the requirements marine and defense buyers specify.

Pascagoula, MS is the Gulf Coast's primary marine and shipbuilding hub. JMC's 50,000 sq ft facility is positioned minutes from Ingalls Shipbuilding and the Port of Pascagoula — making turnaround times and delivery logistics practical for Gulf Coast shipyard supply.

• Stainless steel (304, 316): marine piping and corrosion-critical applications per NAVSEA specification
• Carbon steel: structural and piping in non-saltwater-exposed or coated applications
• Both materials available from a single shop with a single documentation trail

Every marine project at JMC includes the documentation trail the work requires:

• NAVSEA certified weld procedures
• AWS certified welders
• NDE documentation per project specification
• Material traceability: MTRs, heat certifications, weld logs
• Project closeout documentation packages

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• October 6, 2026Pre-Galvanized vs. Hot-Dip Galvanized Steel: What's the Difference?Pre-galvanized sheet is coated at the mill before fabrication. Hot-dip galvanizing after fabrication dips the finished part. Coating thickness, cut edges, welds, cost, and which one a Gulf Coast project needs.
• October 6, 2026What Is an Equipment Skid Base, and How Is It Built?A skid base is the structural steel frame that equipment is mounted, piped, and shipped on. Here's how skid bases are designed and fabricated, from the frame and drip lip to lifting points, flatness, and coating.
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• September 24, 2026What Is a Pipe Spool Drawing, and What Should It Include?A pipe spool drawing is the shop-ready isometric a fabricator builds from. Here's what belongs on one, where the information comes from, and the details that cause the most rework when they're missing.
• September 24, 2026Which Corrosion-Resistant Alloys Work Best in Marine Applications?A practical comparison of corrosion-resistant alloys for marine environments: 316L and duplex stainless, marine aluminum, copper-nickel, titanium, and galvanized steel, and where each one belongs.
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• September 2, 2026How Much Lighter Is Aluminum Than Steel for Fabrication?Aluminum weighs roughly a third of steel for the same volume. What that actually means for a fabrication project, and when the weight difference is worth the higher material cost.
• September 2, 2026What Aluminum Alloy Should You Use for Marine and Coastal Fabrication?5052, 5083, 6061, or 6063: which aluminum alloy actually fits a marine hull, a coastal structure, or an architectural piece, and why the wrong choice shows up as corrosion years later.
• August 19, 2026Pipe Spool Fabrication Tolerances and Quality ChecksWhat dimensional tolerances matter on a fabricated pipe spool, the quality checks that happen before it ships, and why a spool that's slightly off can stop a field crew cold.
• August 19, 2026Specialty Weldments: What They Are and When You Need Custom FabricationWhat separates a specialty weldment from a standard fabricated part, when a project actually needs custom weldment fabrication, and what to give a shop to get an accurate quote.
• August 19, 2026Wall and Deck Penetration Fabrication for Marine and Industrial ProjectsHow structural and pipe penetrations are fabricated for marine bulkheads, decks, and industrial walls, what information a fabricator needs, and why fit matters more than it looks.
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• May 13, 2026Carbon Steel vs. Stainless Steel Fabrication: Choosing the Right Material for Marine and Industrial ApplicationsHow carbon and stainless steel compare on corrosion, weldability, and cost, and how to choose between them for marine, oil and gas, and commercial HVAC fabrication.

• FabricationShipyard Newbuild and Refit Duct FabricationHow marine duct construction and project mechanics differ between newbuild and refit work, and how JMC fabricates for Gulf Coast shipyards from Pascagoula.
• FabricationRefinery and Plant Turnaround Duct FabricationHow process duct differs from commercial HVAC duct, and how JMC fabricates and stages welded industrial duct against a fixed turnaround window from Pascagoula, MS.
• FabricationMilitary and Federal Duct FabricationHow military and federal specification requirements change duct fabrication, traceability, inspection, and closeout documentation, and how JMC handles that scope from Pascagoula, MS.
• FabricationDuct Fabrication by IndustryHow duct requirements change across commercial, marine, and industrial work, and how JMC Fabrication builds for each from one Gulf Coast shop.
• EngineeringCAD and Modeling Software JMC Fabrication UsesJMC's engineering team works in AutoCAD, Revit BIM, and pipe isometric tools to detail, coordinate, and hand off fabrication work to the shop floor.
• EngineeringShop Drawings and Engineering Documentation from JMC FabricationJMC's in-house engineering team produces full shop drawing packages: dimensioned prints, weld maps, BOMs, MTR references, and revision-tracked closeout documentation for fabrication projects.

Fabrication services built specifically for marine work:

• Marine Pipe Spool FabricationNAVSEA and AWS certified marine pipe spool fabrication from Pascagoula, MS, minutes from Ingalls Shipbuilding. Carbon and 316 stainless spools built to shipyard isometrics with full traceability.
• Marine Custom Metal FabricationCustom marine metal fabrication from Pascagoula, MS. NAVSEA and AWS certified weldments, foundations, brackets, and structural assemblies for shipyards and offshore clients, with full documentation.
• Marine Stainless Steel FabricationMarine stainless steel fabrication in Pascagoula, MS. 304 and 316 stainless piping and weldments for saltwater and corrosion-critical systems, NAVSEA and AWS certified, with full traceability.

• The Pascagoula Marine Fabrication AdvantageHow JMC Fabrication's location near Ingalls Shipbuilding and the Port of Pascagoula shapes lead time, freight, and coordination for marine fabrication buyers.

Services most often specified for marine projects:

• Pipe Spool FabricationShop-fabricated pipe spools for oil & gas, marine, and industrial applications. AWS and NAVSEA certified welding from Pascagoula, MS. Carbon and stainless steel.
• Stainless Steel FabricationNAVSEA and AWS certified stainless steel fabrication for marine, oil & gas, and specialty industrial applications. 304 and 316 stainless. Pascagoula, MS.
• Custom Metal FabricationCustom metalwork from concept through delivery — pump skids, penetrations, flanges, subbases, copper assemblies. AWS and NAVSEA certified. 50,000 sq ft shop in Pascagoula, MS.

• Oil & Gas Pipe Fabrication →
• Commercial Metal Fabrication →