Tianjin Quantong Steel Pipe Co., Ltd. It was founded in 2003.Subsidiary Quanshun Anti-corrosion and insulating steel pipe co.,Ltd , Quantong Commerce Co., Ltd and TianjinQuantong Quanshun International Trade Co., Ltd ,etc three company.It is an integrated enterprise which is specialized in producting double surface submerged arc spirally welded steel pipe ,Anti-corrosion and insulating steel pipe and import and export trade.Is located in Jinghai, Tianjin which is the earliest and largest production base for steel pipes in China., the fixed assets of 162 million yuan, with the registered...