We are Shanghai HongXiang Trading Co.,Ltd in China. our company is the largest manufacturer of high frequency welding steel pipes in china. we have advanced preduce process, test method and perfect quality control system , we can supply various dimension pipe with excellent quality and competitive price. We also provides a cmprehensive 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.