Combination & Joint FittingsChina Butt Weld Fittings Mss Sp-75, ASME B16.9 for Welding with API 5L X 70 (PSL-2) Pipes. Material ASTM A860 Wphy-70/A381 Wphy-70., Find details about China ERW Pipe, Seamless Pipe from Butt Weld Fittings Mss Sp-75, ASME B16.9 for Welding with API 5L X 70 (PSL-2) Pipes. Material ASTM A860 Wphy-70/A381 Wphy-70.