China Extra Wide Bore Welded Stainless Tubing Manufacturer, Supplier, Factory

In demanding industrial systems where fluid and gas transport requires maximum volumetric flow with uncompromised structural integrity, no standard pipe will suffice. Our inventory of extra wide bore welded stainless tubing redefines what is possible for large-scale piping networks. Whether you are engineering a petrochemical transfer line, a desalination plant header, or a ventilation shaft for an underground tunnel, the ability to select from extreme diameter sizes while maintaining a precision-welded seam is a critical advantage. We support this range with specialized variants like the Super Large Bore Stainless Welded Tube, which delivers diameters that easily surpass conventional schedule pipe. For contractors focused on seamless integration with heavy-duty flanges and valves, our Ultra Wide Diameter Welded Stainless Pipe provides a reliable, cost-effective alternative to extruded or forged sections. When the application calls for truly massive cross-sections—think cooling water intakes for power stations or pneumatic conveying lines for grain silos—the Giant Caliber Stainless Steel Welded Tubing ensures you never have to compromise on diameter because of manufacturing constraints. And for projects that exist at the outer limits of conventional mill production, our Oversize Wide Bore Welded Stainless Tube is fabricated using specialized roll-forming and welding cells that can handle wall thicknesses and ODs that others cannot.

Extra Wide Bore Welded Stainless Tubing is manufactured using a continuous longitudinal welding process that ensures a homogeneous, fully fused joint with mechanical properties closely matching the base metal. Every length undergoes full non-destructive testing of the weld zone—either via real-time ultrasonic inspection or hydrostatic pressure testing—to meet ASME B31.3 and similar global fabrication codes. The result is a product that combines the geometric freedom of an ultra-large inner diameter with the material performance of austenitic or duplex stainless grades. Common material choices include 304/304L for general corrosion resistance, 316/316L for chloride-heavy environments, and 2205 duplex for elevated strength-to-weight requirements. Post-weld heat treatment and pickling/passivation are available to restore full corrosion resistance in the heat-affected zone. This tubing is designed to integrate directly with grooved couplings, butt-weld fittings, or custom-engineered flanges, enabling rapid assembly on site without the lead times associated with seamless alternatives.

• Welding Method: GTAW (TIG), PAW (Plasma), or multi-arc SAW depending on thickness
• Weld Bead Condition: As-welded, ground flush, or full-bore polished per ASME BPE
• Testing & Inspection: 100% RT or UT of weld seam, hydrotest at 1.5× design pressure
• End Finishes: Plain end, beveled for welding, roll-grooved, or threaded upon request
• Length Options: Standard random lengths of 20 ft (6.1 m), 40 ft (12.2 m), or custom cut
• Certifications: ASTM A240/A312, A358, EN 10217-7, NACE MR0175 ready