Hunan Standard Steel Co., Ltd was founded in 1989. 26 years experience in producing SMLS, ERW, SSAW, LSAW steel pipe and pipe fittings, 5 production bases in economic district of China. With stocked 250,000 tons various of steel material in 520,000 square meters ware house. The company has been insisting on the standard from authoritative organizations such as GB,API,ASTM,DIN,JIS,ISO. Also, we have rewarded ISO9001:2008, SGS, BV, RINA, ISO14001:2004 and etc, which guaranteed the good quality of...[详细介绍]