Carbon Steel Pipe Fittings 1.Seamless size:1/2"--24" 2.Buttwelded size:4"--78" ... elbow,ASTM A234 WPB,Buttweld elbow,seamless buttweld elbow,LR/SR elbowSizeSeamless 1/2" - 78"Wall thicknessSch5S---XXSStandardASTM,ANSI, ASME, ... of productsOur main products are 45° and 90° LR/SR elbows,180° return bend, straight and reducing tees, ... Seamless Buttwelding pipe fitting elbow 90deg LR SR ASTM A234 WPB