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Longitudinal Welded Carbon Steel Tube
Longitudinal Welded Carbon Steel Tube, also known as a Straight Seam Welded Steel Tube, is a fundamental component in modern industrial infrastructure. Manufactured through a process where the steel strip is formed and its longitudinal edges are welded together, this product category offers a robust and cost-effective solution for a multitude of applications. The primary manufacturing method for these tubes is Electric Resistance Welding (ERW), producing what is industry-standard as an ERW Longitudinal Welded Pipe. This technique ensures a strong, uniform weld seam along the tube's length, resulting in excellent dimensional consistency and structural integrity. Engineers and procurement specialists routinely specify Straight Welded Seam Steel Pipe for its reliability in fluid conveyance, structural frameworks, and mechanical systems. When sourcing high-quality tubing with a precise longitudinal weld, a Longitudinal Seam Welded Tube from a certified supplier is the benchmark for performance and value.
The defining characteristic of our Longitudinal Welded Carbon Steel Tube is its precise engineering and adherence to stringent international standards. We utilize high-grade carbon steel, ensuring optimal strength-to-weight ratios and excellent weldability for further fabrication. Our production process incorporates advanced non-destructive testing (NDT) methods, including ultrasonic and eddy current testing, to guarantee the integrity of every weld seam and the overall tube body. This commitment to quality control ensures that our tubes perform reliably under pressure and in demanding environmental conditions. Available in a comprehensive range of sizes, wall thicknesses, and finishes, our Longitudinal Welded Carbon Steel Tube can be customized to meet specific project requirements, including various protective coatings for corrosion resistance.
Key Specifications & Parameters
Our Longitudinal Welded Carbon Steel Tubes are manufactured to meet exacting standards. Below are the core specifications:
- Material Grade: ASTM A53 Grade B, ASTM A500 Grade B, ASTM A513, EN 10219 S235JR, S275JR, S355JR, or equivalent.
- Standards: ASTM, ASME, EN, DIN, JIS, and other international specifications.
- Welding Process: High-Frequency Electric Resistance Welding (HF-ERW).
- Testing: Hydrostatic Testing, Ultrasonic Testing, Eddy Current Testing, Flattening Test, Flaring Test, Bend Test.
- Ends: Plain End (PE), Beveled End (BE), Threaded and Coupled (T&C) as required.
- Surface Treatment: Black, Galvanized (Hot-Dip or Electro), Varnish, or as per customer request.
Standard Size Range
| Outside Diameter (OD) | Wall Thickness (WT) | Length |
|---|---|---|
| 1/2 inch (21.3 mm) to 24 inches (610 mm) | SCH 10, SCH 40, SCH 80, STD, XS, or custom | Standard: 20 ft (6m) or 40 ft (12m). Custom lengths available. |
| Metric: 12.7 mm to 508 mm | 1.0 mm to 12.7 mm | Up to 14 meters based on diameter and transport. |
Mechanical Properties (Typical for ASTM A53 Grade B)
| Property | Metric Value | Imperial Value |
|---|---|---|
| Tensile Strength, min | 415 MPa | 60,200 psi |
| Yield Strength, min | 240 MPa | 35,000 psi |
| Elongation in 2 in (50.8 mm), min | — | — |
| • For walls 0.207 in (5.26 mm) & under | — | 35% |
| • For walls over 0.207 in (5.26 mm) | — | — |
| Elongation in 8 in (203.2 mm), min* | — | — |
| • Calculated from above | 20% | 20% |
*Elongation values are adjusted based on wall thickness and specimen type as per ASTM A53.
Common Applications
- Fluid Transport: Water, oil, gas, and steam pipelines.
- Structural Applications: Building frames, support columns, trusses, and scaffolding.
- Mechanical and Engineering: Machinery parts, rollers, conveyor systems, and hydraulic cylinders.
- Automotive: Chassis components, exhaust systems (specific grades), and structural parts.
- Fencing and Construction: Guard rails, signposts, and architectural elements.
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