our company is one of the largest manufacturer of high frequency welding steel pipes in china. we can supply many other kinds of various dimension pipe with excellent quality and competitive price. our products are widely used in fields like petroleum, chemical industry, aviation, power station, energy and environmental protection. we have advanced preduce process, test method and perfect quality control system , we also provides a comprehensive service of planning, desinging, producing and various steel pipe, we think that the customers think, care that the customers think. we can meet your requirements any time ,please contact us to know details. thanks and best regards company name: shanghai hongxiang trading co.,ltd in