Steel Pipe & TubeChina Tianjin Hx Metal 5CT J55 K55 N80 P110 Steel API Oil Well Seamless Grade L80 Casing Pipe, Find details about China API 5L Steel, Spiral Steel Pipe from Tianjin Hx Metal 5CT J55 K55 N80 P110 Steel API Oil Well Seamless Grade L80 Casing Pipe