Welded tubes are tubular products manufactured by rolling metal strips and then joining the edges through a welding process to form a strong, continuous tube. These tubes offer excellent dimensional accuracy, uniformity, and strength, making them suitable for a wide range of industrial applications. They are available in various materials such as carbon steel, stainless steel, alloy steel, and specialty metals, catering to different performance requirements. Welded tubes are widely used in industries like automotive, construction, oil and gas, and mechanical engineering due to their cost-effectiveness and versatility. Their production involves advanced welding techniques, including Electric Resistance Welding (ERW) and High-Frequency Induction Welding (HFIW), which ensure superior weld quality and minimal defects.
Additionally, welded tubes can be supplied in different shapes and sizes, making them adaptable to specific design needs. They also provide good surface finish and are often subjected to further treatments like galvanization or polishing to enhance corrosion resistance and aesthetic appeal. Overall, welded tubes balance performance, affordability, and availability, making them a preferred choice in many sectors.
| Specification | Description |
|---|---|
| Standards | ASTM A513, ASTM A312, ASTM A789, EN 10305, ISO 8434 |
| Manufacturing Process | Electric Resistance Welding (ERW), High-Frequency Induction Welding (HFIW) |
| Sizes (OD) | 6 mm to 273 mm (varies by standard and application) |
| Wall Thickness | 0.5 mm to 20 mm (depending on size and application) |
| Shapes | Round, Square, Rectangular, Oval |
| Surface Finish | Cold Drawn, Polished, Galvanized, Painted |
| Applications | Automotive, Structural, Mechanical, Hydraulic, Oil & Gas, Furniture |
| Material | Grades |
| Stainless Steel | 304, 304L, 304H, 310S, 310H, 316, 316L, 316H, 316Ti, 317, 317L, 321, 321H, 347, 347H, 904L |
| Carbon Steel | ASTM A53 GR A, ASTM A53 GR B, ASTM A53 GR C, ASTM A333 GR 1 & 6, ASTM A106 GR B, ASTM A106 GR C, API 5L GR B, API 5L X42 / X46 / X52 / X56 / X60 / X65 / X70 |
| Alloy Steel | P1, P5, P9, P11, P12, P22, P91, P92 |
| Duplex Steel | Duplex 2205, Duplex 2507 |
| Super Duplex Steel | Super Duplex 2507, Super Duplex 4501 |
| Monel | Monel 400, Monel K500 |
| Inconel | Inconel 600, Inconel 625, Inconel 718, Inconel X-750 |
| Hastelloy | Hastelloy C22, Hastelloy C276, Hastelloy B2 |
| Alloy 20 | Alloy 20 |
| Titanium | Titanium Grade 2, Grade 5, Grade 7, Grade 12 |
| Cupro Nickel | Cupro Nickel 70/30, Cupro Nickel 90/10 |
