... industrial, ship building, constructionContact :David John 86-15194009714 ZGL GROUP Certificate: ISO9001,API 5CT-0816,API 5L-0602,High ... treatment from rusting. Company ProfileLiaocheng Xinglong Seamless Pipe Manufacturing Co., Ltd is founded in 2004, covering an area of ... in 2009.Production Equipment Liaocheng Xinglong Seamless Steel Tube Manufacturing Co, Ltd. has equipped 60, 90, 140 and 325 ...