Pipe & Tube SystemChina API 5L Grb X52 3PE Anti-Corrosion Insulation Pipe 340mm Btc R3 Casing Pipe API 5CT K55 Oiled and Casing Pipe SSAW/Spiral Steel Pipe Anti-Corrosion Steel Pipe, Find details about China Coating Carbon Steel Pipes, Coating Carbon Steel Pipe from API 5L Grb X52 3PE Anti-Corrosion Insulation Pipe 340mm Btc R3 Casing Pipe API 5CT K55 Oiled and Casing Pipe SSAW/Spiral Steel Pipe Anti-Corrosion Steel Pipe