Stainless Steel Fabricator
Plate to passivation under one roof — in a 40,000 sq ft fabrication area that never sees carbon steel. ISO 9001 · AWS D1.6 · Since 1951.
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. Our stainless-dedicated room has its own tooling, its own welders, its own consumables. Free iron verification per ASTM A380 on critical service assemblies.
Every heat traced by tag. Every welder's continuity log current. WPS, PQR, and welder qualification records pulled with the drawing package — not reconstructed at final inspection. For critical service assemblies: back-purge verification, digital oxygen analyzer readings, Niton XRF PMI, and Leica AT960 laser tracker dimensional inspection. The audit trail ships on the pallet.
Plate to passivation. No subcontracting.
Entire assemblies pickled in one pass — no sectioning, no re-welding after finish.
Most shops outsource pickling, passivation, NDE, or post-weld finishing. Your part travels, waits in queues, and picks up handling damage between stations. At Northern: flat laser, tube laser, 5-axis laser, robotic and manual welding, a 55-foot spray pickling booth, PMI, radiographic testing, hydrostatic testing, and 3D scanning inspection — all in-house. One partner. One schedule. One accountable name.
max fabrication envelope
max single-piece weight
max stainless plate, fiber laser
max stainless plate, rolled
Materials we fabricate
Austenitic
304 · 316 · 309 · 321 · 347
The backbone of food & beverage, pharma, and sanitary applications. Deep welder continuity on both 304L and 316L. Stocked for fast turn.
Austenitic specs →Duplex
2205 · 2507 · LDX 2101
Specified for chloride service, seismic loading, and stress-corrosion-cracking resistance. Single-pass full-penetration welds on heavy plate via K-TIG.
Duplex specs →Specialty alloys
Hastelloy C-276 · AL-6XN · Inconel · Alloy 31
For aggressive chemistry, high-temperature, and pollution-control service where austenitic grades are not enough. PQRs available on request.
Specialty specs →Every stainless process, in-house, in a shop built for stainless alone
5-axis, flat, and tube laser cutting for stainless and specialty alloys. Programmed from CAD flat patterns. Production-ready parts with consistent edge quality on 304, 316, duplex, and specialty grades.
GTAW, GMAW, and robotic welding on stainless, duplex, and specialty alloys. 60+ AWS-qualified welders running ASME Section IX procedures — with weld maps, heat input control, and continuity records.
Press brake forming and heavy plate rolling in stainless up to 2-inch plate. Large-diameter cylinder rolling for pressure vessels and tanks. Tight-tolerance flanges with consistent springback compensation.
55-foot in-house pickling and passivation booth per ASTM A380. Entire assemblies treated in one pass — no sectioning and re-welding after finish.
Full mechanical assembly and factory fit-up of stainless sub-assemblies. Parts arrive at site pre-aligned so field crews drop sections into place instead of rework.
Five steps. One partner. One accountable name on the PO.
Upload drawings (STEP, DWG, DXF, IGES, PDF), tolerances, material, and quantity. We review under NDA on request.
8-person engineering team runs DFM, weld-map planning, and WPS selection. Questions come back fast — not at the last-minute quote return.
Cut, form, weld, and finish — all in the stainless-dedicated area. 60 welders across 78 stations. 5 laser cells, 5 press brakes, Roundo PS 310 roll.
PMI verification, weld NDE, Leica AT960 dimensional inspection, ASTM A380/A967 pickling verification. MTRs pulled by heat number.
Delivered with full weld maps, heat lists, continuity logs, and quality certificates on the pallet. Flatbed through RGN / lowboy for oversized loads.
Have your drawings ready?
Share your specsEvery surface finish, every weld pass, every heat number is traced from plate arrival to shipment. MTR-by-tag. Continuous welder continuity. In-house NDE. Documentation arrives on the pallet — not 'in the mail' a week later.
AVU Registrations cert #00157-4. Continuous since 2015.
Primary welding code. Continuous welder continuity logs.
P8 (304/316), P10H (2205), P43 and P45 qualified, including dissimilar welds.
Process Piping code compliance.
Welded Tanks for Oil Storage.
Federal / defense contract eligible.
Specified and held to the tolerance your drawing requires
3-A sanitary design and ASME BPE-compliant fabrication. Mixer housings, sanitary tanks, skid-mounted CIP systems, 316L weld finishes that pass crevice inspection.
Municipal and industrial treatment systems. Troughs, weirs, chemical dosing skids, duplex 2205 storage tanks rated for chloride service and seismic loading.
ASME Section VIII pressure vessels, exhaust ductwork, reactor internals. 304, 316, and high-nickel alloys for high-heat and aggressive chemical service.
Wet scrubbers, quench vessels, stack liners, demister housings. Corrosion-resistant fabrication built for sustained acid dew-point exposure.
Mirror-polished facade panels, sculptural features, outdoor installations. Surface-quality and weld finish specified and held to the architect's drawings.
Process tanks, chutes, vacuum box frames, heavy-gauge stainless equipment built to survive abrasive, corrosive mill conditions without line-stop repairs.
Three stainless builds tougher than the average shop takes.
Regional wastewater authority needed a 100-foot 304L stainless trough replaced inside a 14-day planned outage. Previous fabricator couldn't hold tolerance over the span.
Power generation facility needed large-diameter stainless exhaust ductwork to mate to existing in-plant flanges during a 5-day scheduled outage — with zero tolerance for forced alignment on site.
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.
Yours isn't the first tough one.
Share your specsTen answers with evidence — the ones a procurement engineer usually asks first.
Most quotes return in 48 hours. Complex assemblies in 5 business days. Share drawings, tolerances, material, and quantity — we'll review under NDA on request.
Send us your drawing package.
Prefer to talk? Call (419) 898-2821 .
