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Shanghai Meilong Valve Co.
Shanghai Neles-Jamesbury Valve Co., Ltd.
Shanghai Pudong Hanwei Valve Co., Ltd. (Shanghai Hanwei Special Valve Manufacturing Co., Ltd.)
Shanghai Shen Kai Petroleum & Chemical Equipment Co., Ltd.
Shanghai Source Mechanical & Electrical Equipment Co. Ltd.
Shanghai Third Navigation ASP Steel Pipe Co, Ltd.
Shanghai Valve Factory
Shanghai Zhongye Steel Pipe Co., Ltd.
Shanxi Fenglei Machinery Manufacturing Co. Ltd
Shanxi Norin Petroleum Machinery Co. Ltd.
Shashi Steel Pipe Works
Shashi Steel Pipe Works Fiberglass Reinforced Plastic Plant
Shengli Steel Pipe Co. Ltd.
Shengli-Highland Co., Ltd.
Shenjiang Valve Co., Ltd.
Shenyang Shengshi High and Medium Pressure Valve Co., Ltd.
Shenzhen Weisheng I.T.S. Petroleum Tubular & Equipment Co., Ltd.
Shijiazhuang Jiahua Special Cement Co., Ltd.
Si Chuan Huijian Petrochemical Equipment Co., Ltd.
Sichuan Chuanshi Chrida Diamond Bit Co., Ltd.
Sichuan Chuanshi Diamond Bit Co., Ltd.
Sichuan Huagong Petroleum Steel Pipe Co., Ltd.
Sichuan Jiahua Enterprise (Group) Co. Ltd.
Sichuan Kaitz Valve Mfg. Co., Ltd.
Sichuan Keycon Valve Manufacturing Co., Ltd.
Sichuan Petroleum Coring Center
Sichuan Petroleum Perforating Materials Ltd.
Sino-American Shanghai Pacific Pipe Co., Ltd.
Sinopec National Star Corporation Dezhou Petroleum Machinery Factory
Siping Wantong Steel - Pipe Company Limited
SJ Petroleum Machinery Co.
South China Marine Machinery Plant
Sow Long (Valve & Fitting) Co., Ltd. (Long Cheng Valves Co., Ltd.)
Special Vehicle Repairing and Manufacturing Plant
Steel Pipe Factory of Pipeline Bureau, CNPC
Steel Rope Factory of AnGang Group Co., Ltd.
Steel Tube Factory of China Third Metallurgical Construction Corp.
Steel Tube Subcompany Bao Shan Iron & Steel Co., Ltd.
Suzhou High & Medium Pressure Valve Factory
Suzhou KF Valve Co., Ltd.
Suzhou Valve Factory
Taixing Petroleum Machinery Co., Ltd.
Tekval Flow Control (Suzhou) Co., Ltd.
The Drilling Pipe & Tools Service Company of Shengli Oilfield
The Thermal Recovery Equipment Manufactory of Shengli General Engineering…
Tianjin Grant TPCO Drilling Tools Co., Ltd.
Tianjin Huafu Oilfield Chemicals Co., Ltd.
Tianjin Lida Steel Tube Plant
Tianjin Lilin Mechanical Group Co. Ltd.
Tianjin Pipe Company Ltd.
Tianjin Seamless Steel Pipe Plant
Tianjin Shengkai Industrial Technology Development Co., Ltd.
Tianjin Shenzhoutong Steel Pipe Co., Ltd
Tianjin Shuangjie Steel Pipe Co., Ltd.
Tianjin Tubular Goods Machining Co. Ltd.
Tieling Machinery & Equipment Manufacturing Co., Ltd of CNPC
Tonghua City DN Petroleum Machine Co., Ltd.
Tonghua Petroleum & Chemical Machinery Works Ltd.
Tonghua Petroleum Tools Co. Ltd.
TSC (Qingdao) Manufacturing Co., Ltd.
United Offshore Construction Company, CONHW
Universal Wire Rope Co., Ltd.
Wan Chi Steel Pipe (Qinhuangdao) Co., Ltd.
Wenzhou Huanqiu Valve Manufacturing Co., Ltd.
Wenzhou Tingyu Group Co., Ltd.
Wuhan Boiler Group Valve Co., Ltd. (Wuhan Advanced Flow Control & Engineering Ltd.)
Wuxi Erquan Special Steel Tube Co., Ltd.
Wuxi Huaying Valve Manufacturing Co., Ltd.
Wuxi Seamless Oil Pipe Co., Ltd.
Wuxi Seamless Steel Tube Co. Ltd.
Wuxi Universal Steel Rope Co., Ltd.
Wuxi Xishan Valve Plant
Xi'an Pump-Valve Clique Works
Xian Yang Petroleum Steel Tube & Wire Rope Co. Ltd
Xinjiang Petro Administration Bureau Machinery Manufacture General Company
Xinjiang Qingsong Cement Co., Ltd.
Xinjiang Tianshan Cement Co. Ltd.
Xinjiang Tunhe Cement Co., Ltd.
Xuzhou Guanghuan Steel Tube Co. Ltd.
Xuzhou Pipeline Tech Co. of SPSTC
Yancheng City Shuangxin Petroleum Machinery Plant
Yancheng City Xinde Petroleum Machinery Plant
Yancheng City Yancheng Power Station Valve Factory
Yancheng High & Medium Pressure Valve Factory
Yancheng Jiulong Valve Manufacture Co. Ltd.
Yancheng Sanyi Petrochemical Machinery Co., Ltd.
Yancheng Teda Petroleum Machinery Company Ltd.
Yancheng Tongshang Valve Co., Ltd.
Yancheng Yangbiao Petroleum Machinery Plant
Yangzhou Shuangliang Valve Manufacturing Co., Ltd.
Yangzhou Steel Pipe Works
Yantai Lubao Steel Tube Duty Co., Ltd.
Yichun Feilong Rock Bits Manufacture Co., Ltd.
Yongjia County Oubei Ball Valve Factory
Yumen Petroleum Administrative Bureau Machine Plant
Zhangjiakou Exploration Machinery General Factory
Zhe Jiang High & Medium Pressure Valve Plant
Zhe Jiang Wu Zhou Valve Co., Ltd.
Zhejiang Chaoda Valve Co., Ltd.
Zhejiang Fangyuan Valve Manufacturing Co., Ltd.
Zhejiang Fangzheng Valve Factory
Zhejiang Guoda Valve Co., Ltd.
Zhejiang Huadong Valve Co., Ltd. (Haigong Valve Factory of Zhejiang)
Zhejiang Huatai Valve Manufacturing Co., Ltd.
Zhejiang Jiehua Valve Co., Ltd.
Zhejiang Kingland Group Pipe Industry Co., Ltd.
Zhejiang KVT Valve Manufacturing Co., Ltd.
Zhejiang Shangyu Valve Manufacture Co., Ltd.
Zhejiang Weidouli Valves Manufacturing Co., Ltd.
Zhejiang Xinda Electric Power Steel Tube Co., Ltd.
Zhejiang Xinhai Valve Manufacture Co., Ltd.
Zhejiang Xulong Machinery Industry Co., Ltd.
Zhejiang Zhenghua Valve Factory
Zhengmao Group Co., Ltd.
Zhengzhou City Butterfly Valve Factory
Zhongcheng Machinery Manufacture Co., Ltd. of Dagang Oilfield Group
Zhongnan Equipment Company Ltd. (The State-Owned 388th Factory)
Zhongshan Walchamp Steel Pipe Co., Ltd.
Zhongyuan Drill & Production Equipment Plant of Zhongyuan P.E. Bureau
Zibo Hongyang Petroleum Equipment Co., Ltd.
Zigong High Pressure Valve Co., Ltd.
Ziyang Steel Pipe Plant
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