Naylor Spiral Buttweld Pipe is manufactured in accordance with ASTM A-139; ASTM A-252. 1. The welding process is concerned: a consistent spiral welded pipe and Longitudinal welding, straight seam metal pipe will inevitably have numerous T-weld, and due to this fact the probability of the existence of welding defects has tremendously improved, and welding residual T welds stress is giant, … Continue reading JMR Part Benders Essex