Tianjin Pipe (Group) Corp.
TFT, Inc.Oklahoma, United States
Zhejiang Jiuli Hi-Tech Metals Co., Ltd.Zhejiang Sheng, China
Wuxi Seamless Oil Pipe Co. Ltd.
COFCO Capital Holdings Co., Ltd.Henan Sheng, China
Zhejiang Jiuli Hi-Tech Metals Co., Ltd.Zhejiang, China
Jiangsu Shagang Co., Ltd.
Shandong Molong Petroleum Machinery Co., Ltd.SD, CN
Shandong Molong Petroleum Machinery Co., Ltd.Shandong Sheng, China
Webco Industries, Inc.Oklahoma, United States
Vallourec Tubos do Brasil SA