Seam Welded Straight Pipe

In industrial fluid conveyance and structural applications, reliability and precision are paramount. Our high-quality Straight Seam Welded Steel Tube is engineered to meet these rigorous demands. Manufactured using advanced Electric Resistance Welding (ERW) technology, this pipe features a single, continuous weld seam running parallel to its length, ensuring superior dimensional accuracy and structural integrity. This specific manufacturing process, which produces what is also known as an ERW Longitudinal Welded Pipe, results in a product with excellent concentricity and a smooth internal surface, minimizing flow resistance and pressure drop in piping systems. Commonly referred to as a Straight Welded Seam Steel Pipe, it is distinguished by its straight-line weld, which differentiates it from spiral-welded alternatives and contributes to its consistent wall thickness and predictable performance under pressure. Ideal for a vast range of uses including water and gas distribution, plumbing, fencing, and mechanical tubing, this versatile Longitudinal Seam Welded Tube offers an optimal balance of strength, durability, and cost-effectiveness for both standard and custom projects.

The construction and performance of our Seam Welded Straight Pipe are defined by meticulously controlled specifications. We utilize premium-grade steel, ensuring consistent material properties and weldability. The pipe undergoes a full normalization heat treatment post-welding, which refines the grain structure in the weld zone and the base metal, eliminating residual stresses and enhancing overall mechanical strength and ductility. This results in a product with uniform hardness and improved resistance to deformation. Every length of Seam Welded Straight Pipe is subject to rigorous non-destructive testing (NDT), including ultrasonic or eddy current inspection, to guarantee the integrity of the longitudinal weld is flawless and free from defects. Furthermore, hydrostatic testing is performed on sampled batches to verify pressure containment capabilities far exceeding standard working requirements. Available in a comprehensive range of sizes, wall thicknesses, and finishes, our Seam Welded Straight Pipe can be supplied as black, galvanized, or with various protective coatings to suit specific environmental conditions and application needs.

Standard Specifications & Materials:

• Standards: ASTM A53, ASTM A135, ASTM A500, ASTM A513, EN 10255, EN 10219, and other international equivalents.
• Common Grades: ASTM A53 Grade B, ASTM A500 Grade B/C, ST37, ST52, S235JRH, S355J2H.
• Production Process: Electric Resistance Welding (ERW).
• Heat Treatment: Full body normalization for superior properties.
• Testing: 100% weld seam NDT (Ultrasonic/Eddy Current) and hydrostatic testing.

Key Mechanical Properties (Typical for ASTM A53 Grade B):

• Tensile Strength: ≥ 415 MPa (60,200 psi)
• Yield Strength: ≥ 240 MPa (34,800 psi)
• Elongation: ≥ 18-22% (in 2")