... ,ISO 5251,DIN 2615Size1/2''-48''(Butt-welding and seamless);1/8''-4''(Threaded and socket-welding);16''~72''(Welded)Wall thicknessSch5 ... ;ASTM A106;ASTM A350 LF2,DIN St37, St45.8, St52.4,St.35.8,St.35.8/IASTM A333 GR.6 ... , WPHY 65, WPHY 60, WPHY 52,WPHY 46,WPHY 42,API 5L GRB, X60, X65, X42,X52,ASTM A403 WP304, A403 ...