My company to ISO9001-2000 international quality management system as the foundation stone, and through the American petroleum institute API 5 L the authentication and CE certificate, my company to 21 mm-914 mm of large diameter seamless tube steel pipe, tube, thermal expansion hot-rolled steel give priority to dozen of steel products. There are the largest area of Cangzhou seamless tube and hot-rolling production equipment, and can do it by myself NDT experiment, squashed hydrostatic pressure test, the test of experimental, bending, is the strength of steel pipe users at home and abroad and preferred steel manufacturers! High quality products, reasonable price, enthusiastic service, are looking forward to cooperating with you!