... WPL6,WPL9,WPL3,WPL8 Low temperature carbon steel pipe fittings Elbows,Tees,Reducers,Caps,Bends,Returns ASTM A420 WPL6,WPL9,WPL3 ... ,WPL8 Low temperature carbon steel pipe fittings Elbows,Tees,Reducers,Caps,Bends,Returns ASTM A420 / A420M Standard ... Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Low-Temperature ...