Seamless steel pipe
Manufactured without a longitudinal welded seam. Commonly selected for pressure piping and services where the specification calls for seamless construction.

Welded steel pipe
Made by forming steel plate or strip and welding the seam. ERW, LSAW, and SSAW are examples of manufacturing processes.

Material variants
Carbon steel, alloy steel, stainless steel, and low-temperature steel grades, subject to the manufacturer’s product offering and project specification.