Longitudinal welded pipe production begins with material and drawing review. Plate preparation, edge preparation and pre-bending establish the geometry required for controlled forming.
Forming and seam preparation
CNC forming and seam closing bring the plate edges into the specified alignment. The forming sequence is selected against plate grade, thickness, diameter and length.
Welding and verification
Internal and external longitudinal submerged-arc welding are followed by straightening, dimensional checks and the inspection methods agreed for the order.