When industrial applications demand exceptional flow capacity and structural integrity, our Super Large Bore Stainless Welded Tube series delivers unmatched performance. Engineered specifically for large-scale piping systems, these products function as an Ultra Wide Diameter Welded Stainless Pipe solution, providing superior corrosion resistance across chemical processing plants and water treatment facilities. Our manufacturing process ensures each Giant Caliber Stainless Steel Welded Tubing meets exacting ASTM A312 and A358 standards, while the Mega Diameter Stainless Welded Steel Pipe variant handles pressures up to 3000 psi in offshore oil and gas operations. Every length undergoes rigorous eddy current and hydrostatic testing, confirming wall thickness consistency from 6mm to 40mm and outer diameters reaching 120 inches. The longitudinal seam welding technique combined with bright annealing delivers a smooth internal bead profile that minimizes turbulence and biofilm accumulation, making these tubes ideal for high-purity water and pharmaceutical transport systems. Applications span intake and discharge pipelines, heat exchanger shells, and architectural structural supports where visual appeal matters alongside mechanical strength.
Oversize Wide Bore Welded Stainless Tube inventory covers an extensive dimensional range tailored for demanding engineering projects. Standard grades include 304/304L, 316/316L, and duplex 2205, with custom alloy options available upon request. The weld seam undergoes in-line planishing and cold reduction to achieve parent metal grain structure, resulting in enhanced fatigue resistance under cyclical loading conditions. Surface finishes range from mill finish to 180 grit polished, with optional passivation treatment for extreme chloride environments. Below is a detailed breakdown of available specifications and mechanical properties for frequently ordered configurations.
| Nominal OD (inches) | Wall Thickness (mm) | Weight per Meter (kg) | Internal Diameter (inches) |
|---|---|---|---|
| 48 | 12.7 | 752.8 | 46.0 |
| 60 | 15.9 | 1185.3 | 57.5 |
| 72 | 19.1 | 1710.6 | 69.0 |
| 96 | 25.4 | 3035.7 | 91.5 |
| 120 | 31.8 | 4719.2 | 114.0 |
| Alloy | Tensile Strength (MPa) | Yield Strength 0.2% (MPa) | Elongation (%) | Hardness (HRB max) |
|---|---|---|---|---|
| 304L | 485 | 170 | 40 | 90 |
| 316L | 485 | 170 | 40 | 95 |
| 2205 | 655 | 450 | 25 | 31 HRC max |
| 254 SMO | 650 | 300 | 35 | 96 |
The production workflow integrates multiple inline quality checkpoints to maintain concentricity within 1% of specified OD and to control ovality to less than 0.5% for diameters above 60 inches. Post-weld sizing rings and expanding equipment ensure internal roundness, which is critical for pigging operations in pipeline maintenance. Double submerged arc welding (DSAW) applies filler metal with controlled ferrite content, reducing susceptibility to hot cracking during service at elevated temperatures. For ultra-large bore projects exceeding 120 inches, our facility utilizes 5-meter expansion beds capable of cold expanding segments to final dimensional tolerance. Each tube receives a unique heat number traceable to the original mill certificate, and a 3.1 material certificate according to EN 10204 accompanies every shipment. Third-party inspection agencies including DNV, Lloyd’s Register, and BV can witness and certify upon client request. These thorough quality protocols ensure our Oversize Wide Bore Welded Stainless Tube remains the backbone of critical infrastructure worldwide, from desalination plants to LNG terminal manifolds.
