TIAN JIN SDTL STEEL PIPE CO.,LTD is a subsidiary company of CHINA STEEL UNITED GROUP.OUr Group have 10 subsidiary company in whole China.SDTL STEEL was established in 1998,Located in one of the biggest city Tianjin which is TIAN JIN SDTL STEEL PIPE CO.,LTD is Tianjin sales company of Jinfa Group. We are one of the biggist steel pipe stockist in North China. Our main products is seamless steel pipe,carbon steel pipe,alloy steel pipe,API steel pipe,ASTM steel pipe,DIN steel pipe and more.We are keeps steel pipe stock 30,000MT every year.Our products ranges from ,TPCO Group,JinFa Group,Bao Steel Group,and Hunan Valin Iron & Steel Group Co., Ltd.And we are first level agent of their.JinFa Group can prouduce steel pipe from O.D 6mm to O.D 426,the T.K from 1mm to 100mm.http://www.allsteelpipe.org/