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Cangzhou Qieernuo Steel Pipe Co., Ltd., situated at Wugang Road, Yanshan County, Hebei Province, was founded in 2005, covering an area of 32,000 square meters, with a construction area of 8,000 square meters. In possession of complete and efficient quality management system and quality guarantee system, the co***ny passed the ISO9001 Quality System certification in February, 2006, operating the API5L and API5CT certification on a trial basis in 2008. With the total investment of RMB 20 million, the co***ny ...
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