Welded pipe is fabricated by uncoiling & leveling steel strip, roll forming, high-frequency resistance welding or spiral submerged arc welding, weld bead grinding, stress relief heat treatment, hydrostatic test and non-destructive inspection before fixed cutting.

Welded pipe is fabricated by uncoiling & leveling steel strip, roll forming, high-frequency resistance welding or spiral submerged arc welding, weld bead grinding, stress relief heat treatment, hydrostatic test and non-destructive inspection before fixed cutting.

Welded pipe is fabricated by uncoiling & leveling steel strip, roll forming, high-frequency resistance welding or spiral submerged arc welding, weld bead grinding, stress relief heat treatment, hydrostatic test and non-destructive inspection before fixed cutting.