For industrial projects requiring exceptional flow capacity and structural integrity, Super Large Bore Stainless Welded Tube solutions offer a reliable alternative to seamless pipe when diameters exceed standard manufacturing limits. Our Giant Caliber Stainless Steel Welded Tubing range is engineered through longitudinal welding of high-quality stainless steel plates or coils, achieving outstanding dimensional consistency in sizes that simply cannot be produced by extrusion or piercing methods. When specifications call for an Oversize Wide Bore Welded Stainless Tube, the precision welding process ensures uniform wall thickness, tight ovality tolerances, and a smooth bead profile that minimizes turbulence in fluid transport. For heavy-duty structural and mechanical applications, our Mega Diameter Stainless Welded Steel Pipe is fabricated in diameters exceeding 1000 mm (40 inches), with wall thicknesses up to 30 mm, making it suitable for high-pressure, high-temperature, and corrosive environments. Below are the key specifications and capabilities of our ultra wide bore welded stainless pipe products.
| Parameter | Specification |
|---|---|
| Material Grades | 304/304L, 316/316L, 321, 310S, Duplex 2205, Super Duplex 2507 |
| Outside Diameter (OD) | 24" (609.6 mm) – 120" (3048 mm) |
| Wall Thickness (WT) | 3.0 mm – 30.0 mm (SCH 10S through SCH 160) |
| Length | Standard 6 meters; custom lengths up to 12 meters |
| Welding Method | Automatic TIG, Plasma, or Submerged Arc Welding (SAW) with full penetration |
| End Finish | Plain End, Beveled End |
| Surface Finish | 2B, Pickled & Passivated, Polished (up to 320 grit) |
| Testing & Certification | 100% Nondestructive Testing (RT/UT), PMI, Positive Material Identification, Mill Test Reports |
| Standards | ASTM A312, ASTM A358, ASME SA312, EN 10217-7 |
The Ultra Wide Diameter Welded Stainless Pipe is produced from certified master coils or plates, subjected to edge preparation, forming, welding, and precision sizing to ensure consistent roundness. Our manufacturing process incorporates inline bright annealing and pickling lines that restore the passive chromium oxide layer after welding, maintaining the corrosion resistance of the base material across the entire cross-section. The weld seam undergoes controlled refinement, resulting in a metallurgical bond that frequently exceeds the strength of the parent metal. These pipes are widely deployed in desalination plants, petrochemical columns, large-diameter headers, cooling water circuits, and architectural structures where both visual appeal and load-bearing performance are critical. Because of the scale, each order is supported by detailed engineering packages that include dimensional reports, mechanical testing data, and nondestructive evaluation records. Standard grades include austenitic 304/304L for general service and 316/316L for enhanced pitting resistance, while duplex options deliver approximately twice the yield strength of standard austenitic alloys, enabling lighter wall designs and cost savings for large-diameter installations. Custom fabrication of fittings, flanges, and spools from the same material lot is available to maintain full traceability across the project supply chain.
