Service · Welded Fabrication

TIG. MIG.
Frames. Vessels.
AWS compliant.

Welded fabrication services combining CNC parts, sheet metal, and tubing into welded assemblies. TIG and MIG welding of carbon steel, stainless, aluminum. AWS D1.1 (steel) / D1.2 (aluminum) compliant. Frames, enclosures, pressure vessels, structural assemblies.

Welded Fabrication Quote Welding standards

TIG / MIG capable AWS D1.1 / D1.2 Aluminum / steel / stainless Post-weld machining

01 · Welded products

Welded fabrication categories.

Welded fabrications combine multiple parts into integrated assemblies. Often more economical than single-piece machined parts for large structures.

Sheet metal frames

Steel / aluminum

Welded sheet metal enclosures, equipment frames, electrical cabinets. CNC-cut sheet + laser bend + welded.

Tube frames

Various profiles

Welded tube frames for equipment supports, racing chassis, bicycle frames. Round and rectangular tubing.

Pressure vessels

316L / carbon steel

Pressure vessel components and small pressure vessels. ASME-compatible (with partner for code stamping).

Battery pack enclosures

5083 aluminum

Welded aluminum enclosures for battery storage systems, EV battery packs. IP67 sealed welded construction.

Structural assemblies

Heavy steel

Heavy structural welded assemblies — equipment bases, machine structures, industrial framework.

Hopper / chute

Stainless / steel

Welded hoppers, chutes, conveyor structures for material handling industries.

Tank fabrication

316L / 304

Stainless steel tanks for food, pharmaceutical, chemical processing. Sanitary welds for hygienic applications.

Heat exchanger

Copper / steel

Heat exchanger fabrication — shell, tube, manifolds. Brazing and welding combined.

Custom weldments

Mixed materials

Custom weldments per customer specification. Combination of CNC parts, sheet metal, tubing welded per drawing.

02 · Welding capabilities

Welding processes & standards.

TIG (GTAW)

High-quality welding for thin material, aerospace, food-grade. Manual or automated.

MIG (GMAW)

Faster welding for thick material, production. Semi-automatic standard.

Spot welding

Resistance spot welding for sheet metal assembly. Fast, consistent.

Stick (SMAW)

Heavy structural welding, field repairs. Limited use in our shop, mostly outdoor.

AWS D1.1 compliance

Structural steel welding code compliance for steel weldments

AWS D1.2 compliance

Aluminum structural welding code compliance for aluminum weldments

Welder qualifications

Welders qualified per AWS standards. Documentation available.

Pre/post-weld machining

Combine welded fabrication with CNC for finishing critical features post-weld

Stress relief

Post-weld stress relief for precision fabrications

FAQ

Welded Fabrication questions.

For small parts (<300mm): typically CNC from billet is cheaper. For large parts (>500mm): welded fabrication often more economical. Welded structure reduces material waste from machining. Critical features can be machined post-weld for precision. Weldment break-even depends on geometry, but welded saves material cost above ~500mm structures.

Carbon steel: MIG for production, TIG for precision. Stainless steel: TIG for food/medical/pharmaceutical (clean welds), MIG for general industrial. Aluminum: TIG for thin sheet (5052), MIG for thicker (6061). Specific filler materials per base metal grade. AWS standards specify proper combinations.

Aluminum welding is more difficult than steel — high thermal conductivity, oxide layer, distortion potential. We use AC TIG for aluminum (cleaning action removes oxide). Welder qualification on aluminum specifically required. Distortion managed with weld sequence, jigging, post-weld stress relief. For precision aluminum welding, expect higher cost than steel.

For food, pharmaceutical, biotech: sanitary stainless welds required. Smooth internal weld, no discoloration (oxidation), no crevices. Achieved with: orbital TIG welding (automated), back-purging (inert gas inside tube), proper procedure. For pharmaceutical ASME BPE compliance: orbital welding with full documentation. We coordinate sanitary welding with appropriate techniques.

Standard ASME pressure vessels require code stamp. We do not hold ASME U-stamp directly but partner with U-stamp shops for ASME-required vessels. Most of our pressure vessel work is non-ASME (lower pressures, non-stamped service). For coded vessels, work routed through partners; for non-coded pressure equipment, we fabricate directly.

Distortion managed by: (1) Pre-welding jig fixtures for alignment. (2) Symmetric weld sequences to balance heat. (3) Tack welding before continuous welding. (4) Post-weld stress relief at 500-650°C for steel. (5) Post-weld machining of critical features. (6) Welding sequence optimization with simulation if needed. For precision weldments, expect 0.5-2mm distortion accommodated by post-weld machining.