Hengyang Valin MPM Co., Ltd., Hengyang
Hengyang Valin Steel Tube Co., Ltd., Hengyang
Jiangsu Huacheng Industry Group Co., Ltd., Zhangjiagang
Jiangyin Metal Tube Making Factory, Jiangyin
Jiangyin City Seamless Steel Tube Factory, Jiangyin
Pangang Group Chengdu Iron & Steel Co., Ltd., Chengdu
Shenyang Xinda Co., Ltd., Shenyang
Suzhou Seamless Steel Tube Works, Suzhou
Tianjin Pipe (Group) Corporation (TPCO), Tianjin
Wuxi Dexin Steel Tube Co., Ltd., Wuxi
Wuxi Dongwu Pipe Industry Co., Ltd., Wuxi
Wuxi Seamless Oil Pipe Co., Ltd., Wuxi
Zhangjiagang City Yiyang Pipe Producing Co., Ltd., Zhangjiagang
Zhangjiagang Yichen Steel Tube Co., Ltd., Zhangjiagang
