astm a234 wpb elbows 1.size:1/2" to 56" 2.Thickness:SCH10/20/40/80/160 3.Standard:ANSI,DIN, ... )Type45\90\180 degree elbow,tee, reducer ,cap etc.Size1/2"-24" seamless,26"-56" weldedMaterialASTM A234 WPB, WPC,ASTM A105,A403 ... /1541,API Trade Shows:1.Chinese Canton Fair every year. 2.Germany Dusseldorf Fair in 2008. 3. Iran Tehran Oil Show ...