ISO 9001 API CERTIFICATE COMPETITIVE PRICE EXCELLENT seamless steel pipe, seamless pipe, seamless steel tubeCompany NameHebei Dingsheng Pipe Co., LtdBusiness Type: ... Manufacture and ExporterProductCarbon seamless steel pipe, Alloy pipe , welded pipe ,stainless steel pipe ... and so on Carbon steel API 5L GR BSeamless Steel Pipe High pressure