Skip to main content
Northern Manufacturing
Quote
Menu
Interior of Northern Manufacturing's dedicated stainless-only fabrication area

Stainless Steel Fabricators Who Build What Others Can't

Complex stainless fabrication across a 160,000 sq ft facility in Oak Harbor, Ohio, with a dedicated stainless-only room at its core: plate to passivation, under one roof.

  • ISO 9001:2015
  • 60+ AWS-Certified Welders
  • 304 / 316 / 2205 / AL-6XN / Hastelloy
  • Founded 1951

160,000 sq ft

indoor fabrication facility

Oak Harbor, Ohio. Heavy plate, large weldments, and full assembly under one roof, primarily stainless with carbon capacity when a job calls for it.

40,000 sq ft

dedicated stainless-only space

A walled-off room within the facility that never sees carbon steel: dedicated tooling, consumables, and welders. No cross-contamination, no free iron on finished surfaces.

160

craftsmen on the floor

Engineering, cutting, forming, welding, finishing, and inspection staffed in-house across two shifts.

55-foot

pickling & passivation booth

Entire assemblies pickled in one pass. No sectioning, no re-welding after finish.

What other shops can't build

Three projects other shops passed on, or tried and couldn't hold spec.

100-foot 304L stainless steel trough for wastewater treatment

Delivered straight within 1/8 inch over 100 feet, tighter than spec. Installed without field rework.

A 100-foot stainless trough, straight within 1/8"

Regional wastewater authority needed a 100-foot 304L stainless trough to replace a failed unit during a planned outage. Straightness was specified within 1/8 inch over the full 100-foot length. The previous fabricator couldn't hold tolerance over the span.

304L Stainless Steel
Massive lobed stainless steel power generation ductwork vessel with a conical end suspended in the Northern Manufacturing fabrication bay

Every section was dry-fit against its mating part in the shop and dropped onto the in-plant flanges on the first attempt, with no forced alignment and no field rework.

Large-diameter exhaust duct sections that mated on the first attempt

Power generation facility needed large-diameter stainless exhaust ductwork to mate to existing in-plant flanges during a scheduled outage, with zero tolerance for forced alignment on site.

304 Stainless Steel
Formed 316L stainless steel equipment housing staged on a pallet in the fabrication bay

Zero NCRs, passed radiographic inspection on first submission. Customer returned with repeat orders.

Catastrophic weld failure, solved by full-penetration GTAW

Food & beverage OEM was seeing stainless weld joints fail in the field within months. Previous fabricator had not adjusted joint geometry for the service environment.

316L Stainless Steel

Have a stainless job others have turned down?

Send us the drawing
Interior of Northern Manufacturing's dedicated stainless-only fabrication area

40,000 sq ft of fabrication floor that never sees carbon steel

Carbon and stainless share the same shop in almost every fabrication facility. Free iron transfers from grinders, clamps, tables, and weld spatter, and shows up weeks later as rust bloom or pitting on finished stainless surfaces.

  • Dedicated tooling, consumables, and welders, never shared with carbon steel
  • Free-iron verification per ASTM A380 on critical-service assemblies
  • Separate grinders, clamps, and work tables. Zero cross-contamination path.
  • No rust bloom or pitting weeks after the part ships
55-foot pickling and passivation booth at Northern Manufacturing

Plate to passivation, under one roof

Plate to passivation, no subcontracting

Most shops outsource pickling, passivation, or post-weld finishing. Your part travels, waits in queues, picks up handling damage between stations. We don't. From plate to passivation, the work happens here, under one quality system, with one accountable name.

Pickling booth
55 ft
PMI + UT + Hydro
In-house
Laser cutting
5-axis
One quality system
One partner
Welder at Northern Manufacturing running a stainless weld pass

Welders who stay qualified on the code your project lives under

AWS D1.6 stainless qualifications aren't optional for critical stainless work, and they aren't static.

  • 60+ welders with active qualifications on AWS D1.6, D1.1, and ASME Section IX
  • Continuous recertification cadence, not one-and-done
  • WPS and PQR packages on file, aligned to your drawing callouts
  • Welder continuity logs available on request before award

Send the drawing. An engineer reviews every RFQ.

Or call (419) 898-2821

Request a Quote

Industries we serve

Where stainless steel has to perform under real service conditions.

Stainless cylinder for food-grade processing

Featured Industry

Food & Beverage

Fabrication built to 3-A sanitary and ASME BPE requirements when your spec invokes them. Mixer housings, sanitary tanks, skid-mounted CIP systems, 316L weld finishes that pass crevice inspection.

Stainless equipment for wastewater treatment

Featured Industry

Water & Wastewater

Municipal and industrial treatment systems. Troughs, weirs, chemical dosing skids, duplex 2205 storage tanks for chloride service, fabricated to your seismic and corrosion drawing requirements.

More industries we serve

Stainless components for power generation infrastructure

Power, Energy & Chemical

Exhaust ductwork, process and tower internals, process piping, and structural components welded to code-quality procedures. 304, 316, and high-nickel alloys for high-heat and aggressive chemical service.

Precision stainless weld for corrosion-resistant pollution control equipment

Pollution Control

Wet scrubbers, quench vessels, stack liners, demister housings. Corrosion-resistant fabrication built for sustained acid dew-point exposure.

Sunset Spectacular: architectural stainless steel structure fabricated by Northern Manufacturing on Sunset Blvd

Architectural

Mirror-polished facade panels, sculptural features, outdoor installations. Surface-quality and weld finish specified and held to the architect's drawings.

Stainless fabrication for pulp and paper mills

Pulp & Paper

Process tanks, chutes, vacuum box frames, heavy-gauge stainless equipment built to survive abrasive, corrosive mill conditions without line-stop repairs.

Materials and processes

From plate to passivation, our custom stainless steel fabrication runs austenitic, duplex, and specialty alloys through cutting, forming, welding, and finishing under one roof.

Common questions

What engineers and procurement managers ask before they send a drawing.

What does Northern Manufacturing fabricate?

Custom stainless steel equipment and weldments: process and storage tanks, pipe spools, ductwork, structural assemblies, and sanitary equipment, in austenitic, duplex, and nickel alloys. We also hold the ASME U (#63199) and PP (#63198) Certificates of Authorization and are authorized to build code pressure vessels and pressure piping to your specification at our Oak Harbor shop.

What grades and alloys do you run?

Austenitic 304, 316, 309, 321, and 347; duplex 2205, 2507, and LDX 2101; and nickel alloys including Hastelloy C-276, C-22, and AL-6XN. Welding procedures are qualified per ASME BPVC Section IX and AWS D1.6.

What makes a stainless-only shop different?

Within our 160,000 sq ft facility, a dedicated 40,000 sq ft stainless-only room runs no carbon steel, so there is no free-iron cross-contamination on the passive surface. The rest of the facility handles heavy fabrication and assembly, primarily stainless with carbon capacity when a job needs it. Cutting, forming, welding, pickling, passivation, and inspection happen under one roof.

Do you provide material and weld documentation?

We provide the records your specification and purchase order require: Material Test Reports traced by heat, weld maps with WPS references, welder continuity logs, PMI, and NDE reports, available on request.

Send us a drawing. We'll tell you what it takes.

Engineering reviews every drawing, and an engineer is on the phone when you need one.