S355JR Electric Straight Seam Welded Pipe
Wall thickness: Widely applicable, commonly from 6mm to 50mm or thicker
Length: Typically 6 meters to 12 meters (standard length), custom sizes available upon request
Product Introduction of S355JR Straight Seam Welded Pipe
Straight seam welded pipe is a structural pipe welded along the length of a steel plate or strip using an electric arc welding process (usually submerged arc welding). Its core lies in using S355JR low-alloy high-strength structural steel as the material, as specified in European standard EN 10210. Through automated and large-scale electric welding processes, it produces medium-to-large diameter steel pipes with excellent mechanical properties, superior weld quality, and strong load-bearing capacity, making it a backbone material in the field of heavy steel structures.
Weld Treatment of S355JR Straight Seam Steel Tubes
Weld treatment of S355JR electric straight seam welded pipes is a core aspect of their quality. After completing the main weld using submerged arc welding or other electric arc processes, the standard procedure includes grinding the weld reinforcement and post-weld heat treatment. Grinding removes surface reinforcement, resulting in a smooth weld contour, completely eliminating stress concentration caused by geometric abrupt changes, and significantly improving the fatigue resistance of the structure. For demanding conditions requiring higher toughness or the elimination of residual welding stress, overall stress-relief annealing or localized normalizing of the weld is employed. This process refines the grain size in the weld zone, restoring its toughness and strength to match that of the S355JR base material, ensuring the safety and reliability of the welded joint under dynamic loads and low-temperature environments.
About our company
Founded in 2008, GNEE STEEL is a professional supplier and service provider specializing in high-end steel and welded steel pipes. We are committed to providing global industrial and construction customers with high-quality steel pipe products, such as the S355JR series welded steel pipes, high-frequency welded pipes, and electric straight seam welded pipes, as well as customized solutions.
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