When engineering projects call for large-diameter tubing with reduced wall thickness, the right material choice ensures structural integrity without excessive weight. Our comprehensive inventory of Big Bore Light Wall Carbon Steel Welded Tube meets critical demands in fluid transport, piling, and architectural frameworks. Whether referred to as Oversized Caliber Slim Wall Welded Steel Pipe, Wide Diameter Low Thickness Carbon Steel Tube, or Broad Bore Thin Gauge Welded Steel Pipe, these products share a core advantage: optimized material usage while handling high-volume flow or carrying loads in a lighter structure. Manufactured through high-frequency induction welding or submerged arc welding, each tube undergoes rigorous dimensional checks and hydrostatic testing. The carbon steel chemistry is precisely controlled to deliver consistent yield strength between 35,000 and 50,000 psi, making these tubes suitable for water mains, sign poles, conveyor rollers, and temporary shoring systems. Their broad diameter-to-wall ratio significantly reduces per-foot weight, lowering transportation costs and simplifying on-site handling without compromising performance under internal pressure or bending stress.
Large Bore Minimal Wall Welded Steel Tube in our production range is formed from hot-rolled or cold-rolled strip steel that passes through a series of forming rolls, then welded longitudinally using a high-frequency process. The weld seam is heat-treated in-line to normalize the grain structure, ensuring uniform hardness across the joint. Key quality control steps include real-time ultrasonic weld inspection, off-line flattening tests, and full-length hydrostatic testing at pressures calculated per ASTM and API formulas. The external surface can be supplied black, oiled, or with zinc-rich primer, while internal coating options include cement mortar lining or liquid epoxy for potable water service. Dimensional tolerances follow ASTM A500, A252, or A513, with outer diameter tolerances of ±0.5% and wall thickness within ±10% of nominal. This versatile tube type bridges the gap between standard pipe and custom-fabricated cylinders, providing engineers a cost-effective, reliable component for civil engineering, marine structures, and industrial ductwork.
| Parameter | Range / Specification |
|---|---|
| Outer Diameter | 12.750" (323.9 mm) – 80.000" (2,032 mm) |
| Wall Thickness | 0.134" (3.4 mm) – 0.500" (12.7 mm) – thinner or heavier gauges can be produced per project requirements |
| Length | Random lengths 20 ft / 40 ft, or cut-to-length from 10 ft up to 80 ft |
| Steel Grade | Carbon steel to ASTM A500/A252/A53; yield strengths 35 ksi, 42 ksi, 46 ksi, 50 ksi |
| Dimensional Standard | ASTM A500, A252, A53, ASME B36.10; custom OD/WT combinations available |
| Weld Seam Quality | Full penetration, normalized; ultrasonic testing per ASTM E273 or manual/automatic UT |
| Hydrostatic Test | Per applicable standard; typically 85% of specified minimum yield strength in hoop stress |
| Mill Tolerances | OD: ±0.5%, Ovality: within 1% of nominal OD, WT: -10%/+15% (can be tightened on request) |
| Chemistry (Carbon Steel) | C ≤ 0.26%, Mn ≤ 1.35%, S ≤ 0.035%, P ≤ 0.035% (typical; adjusts per grade) |
| Applications | Dredge pipes, jacket legs, bollards, structural columns, culverts, sign supports, marine piling |
