... ISO 9001:2000 sdandardTianjin BoRuiXiang Steel Pipe Sales Co., Ltd.is a group enterprise .Our company is located in tianjin.It ... good cooperation with Chengdu Steel Group Co., Ltd., Baotou Steel Group Co., Ltd., Baoshan SteelCorporation and Tianjin Steel Pipe Group Co., Ltd.in China.With many years' ... 45#, ST45, ST55, CK45, Q235 (B, C, D, E), Q345 (B, C, D, E), 16Mn, 20Mn, 45Mn,27SiMn, 20G, 20Cr, 40Cr ...