CPE line of Jiangsu ChangBao Steel Tube Co., Ltd was normal produced, TZCE supply cone type piercer, mandrel loosen mill, extracting mill and mandrel rolling mill etc. Main productions of this line are high class petroleum pipe and high-pressure boiler pipe. The CPE line first time use high precision and high rhythmic cone type piercing technology and first time use high strength 6-upright pre-tightening mandrel loosen mill.