ASTM A-252. The heat and coil number of chosen coil is be recorded to the pipe manufacturing report that showing associated pipe quantity. Is the market chief capacity sensible in manufacturing of large diameter submerged Arc Welded (SAW) Pipes utilizing U-E, J-C- and Helical Processes. Spiral double welding pipe course of Double submerged arc welded … Continue reading Naylor Spiral Buttweld Pipe is manufactured in accordance with ASTM A-139