... steel elbow,ASTM A234 WPB,Buttweld elbow,seamless buttweld elbow,LR/SR elbowSizeSeamless 1/2" - 78"Wall thicknessSch5S---XXSStandardASTM,ANSI, ASME ... -factory inspection of productsOur main products are 45° and 90° LR/SR elbows,180° return bend, straight and reducing tees, concentric ... Cell phone:86-15830565735 Seamless Buttwelding pipe fitting elbow 90deg LR SR ASTM A234 WPB