... industrial, ship building, constructionContact :David John 86-15194009714 ZGL GROUP Certificate: ISO9001,API 5CT-0816,API 5L-0602,High ... . Company ProfileLiaocheng Xinglong Seamless Pipe Manufacturing Co., Ltd is founded in 2004, covering an area of 15,000 square meters. ... in 2009.Production Equipment Liaocheng Xinglong Seamless Steel Tube Manufacturing Co, Ltd. has equipped 60, 90, 140 and 325 mill ...