Helical (Spiral) Seam SAW Pipes (HSAW)

by Jindal Tubular USA, LLC

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Jindal Tubular USA manufactures large diameter Helical (Spiral) Seam SAW pipes (HSAW), utilizing advanced technology in a high-speed two-step process. In the first step, the pipe forming takes place as the steel is uncoiled, straightened, flattened, helically rolled to form the desired pipe diameter, and then tack welded. In the second step, the pipe is submerged arc welded along the inside and outside spiral weld seam. There are four SAW welding lines, each utilizing digital welding technology and optical seam tracking. Depending upon the specification, the pipes are then subject to hydrostatic testing, automatic ultrasonic testing, and radiography. Our in-house laboratory performs tests for the chemical and mechanical properties. This ensures full compliance with specification requirements and customer expectations. After the finished pipes are accepted through our testing and inspection, they are conveyed to the coating plant adjacent to the pipe mill for application of anti- corrosion and internal coating.