High Thickness Welded Stainless Conduit

When industrial systems demand exceptional pressure retention and structural integrity, standard tubing often falls short. Our advanced manufacturing process delivers a premium selection of heavy-wall welded stainless steel conduits that outperform traditional options across chemical processing, oil and gas, and high-pressure hydraulic applications. For engineers specifying reinforced performance parameters, we offer a complete range including Reinforced Wall Welded Stainless Tubing with precisely controlled fusion zones that minimize stress concentration. Projects requiring extreme radial strength can rely on our Bulky Wall Stainless Welded Conduit, which maintains uniform wall thickness even in large diameters. The portfolio extends to Dense Wall Stainless Steel Welded Pipe for high-cycle fatigue environments, and Robust Gauge Welded Stainless Tube designed for abrasive slurry transport. Each variant shares the same core manufacturing DNA—full-penetration welds, post-weld solution annealing, and 100% eddy current testing—ensuring a homogeneous microstructure from OD to ID.

High Thickness Welded Stainless Conduit serves as the cornerstone of this heavy-wall family, engineered to deliver consistent mechanical properties under demanding conditions. The product incorporates longitudinal welded seams produced through automated TIG or plasma arc processes, followed by in-line heat treatment that restores corrosion resistance adjacent to the weld. The result is a conduit that achieves equivalent strength ratings to seamless alternatives but with tighter dimensional tolerances and shorter lead times. Material options span austenitic grades 304/304L and 316/316L as standard, with duplex 2205 and super austenitic 904L available on request. Every heat lot is traceable to mill test reports confirming compliance with ASTM A312, A358, and ASME B36.19M standards. Surface finishes range from pickled-and-passivated for general chemical service to bright annealed for oxygen-clean applications. These characteristics make it the preferred choice for heat exchanger shells, boiler tubing, and high-pressure instrumentation lines where wall thickness-to-diameter ratios exceed schedule 80.

• Material Grades: 304, 304L, 316, 316L, 321, 310S, 2205, 904L
• Outer Diameter Range: ¼″ to 24″ (13.7 mm – 610 mm)
• Wall Thickness: 3.0 mm – 40.0 mm (Schedule 10S through XXH and custom)
• Length Options: Random (5–7 m), Fixed (6 m, 12 m), or Cut-to-Length
• Weld Process: GTAW (TIG), PAW, or combination with 100% X-ray on request
• Heat Treatment: Solution annealed at 1040°C–1150°C followed by water quenching
• Testing: Hydrostatic test at 1.5× design pressure, PMI, Surface Flaw Detection