... seamless);1/8''-4''(Threaded and socket-welding);16''~72''(Welded)Wall thicknessSch5~Sch160\XXSManufacturing processPush, Press, Forge, Cast, etc.Material ... , WPHY 65, WPHY 60, WPHY 52,WPHY 46,WPHY 42,API 5L GRB, X60, X65, X42,X52,ASTM A403 WP304, A403 WP304L ...