| Jiangsu Yaxing Anchor Chain Co., Ltd | API 2F 、 API Q1 | | |
| Baoda Tubular Goods Producing Ltd., Co. | API 5CT | | |
| Baogang Group Shanghai Steel Pipe Co., Ltd | API 5CT | | |
| Shanghai Baoshun Steel Tube Co., Ltd. | API 5CT | | |
| Wuxi Seamless Steel Pipe Co.,Ltd | API 5CT | | |
| Suzhou Friend Tubing and Casing Pipe Co., Ltd. | API 5CT | | |
| Shanghai Baofu Steel Tube Co.,Ltd | API 5CT | | |
| Shanghai Hongshun Tube Manufacturing Co., Ltd | API 5CT | | |
| Shanghai Fanzhengrong Steel Pipe Co.,Ltd | API 5CT | | |
| Wuhan Wugang Group Hanyang Steel Factory | API 5CT | | |
| Tonghua Iron & Steel (Group) Panshi Seamless Steel Tube Co., Ltd | API 5CT | | |
| Shanghai Yuezhou Steel Pipe Co., Ltd | API 5CT | | |
| Benxi Northern Steel Pipe Co. Ltd. | API 5CT | | |
| Daqing Yilang Site Petroleum Special Pipe Co., Ltd. | API 5CT | | |
| Wuxi Seamless Steel Pipe Co.,Ltd | API 5CT、 5L、Q1 | | |
| Jiangyin City Seamless Steel Tube Factory | API 5CT、 5L | | |
| Hebei Zhongyuan Steel Pipe Manufacturing Co., Ltd. | API 5CT、 5L | | |
| Wuxi Zhenda Special Steel Tube Manufacturing Co., Ltd | API 5CT 、5L API Q1 Plus | | |
| Changzhou Darun Steel Tube Co., Ltd. | API 5CT、 5L | | |
| Shanghai Yueyuechao Manufacture Tube Co., Ltd | API 5CT、 5L | | |
| Jiangsu Huashun Steel Pipe Co., Ltd. | API 5CT 、5L | | |
| Jiangyin Jieda Shaped Tube Co., Ltd. | API 5CT 、5L | | |
| Suzhou Seamless Steel Tube Works | API 5CT 、5L | | |
| Wuxi Dexin Steel Pipe Co., Ltd. | API 5L CE | | |
| Cangzhou Xinyida Steel Pipe Co., Ltd. | API 5L | | |
| Ningbo Jun-Cheng Metal Pipe Co., Ltd | API 5L | | |
| Zhejiang Xinda Electric Power Steel Tube Co., Ltd | API 5L | | |
| Zhejiang Baolong Valve Manufacturing Co.,Ltd | API 600 | | |
| Yancheng Jigao Petroleum Machinery Co., Ltd. | API 6A 16C | | |
| Nantong High & Medium Pressure Valve Co., Ltd | API 6A | | |
| Shanghai Lixing Valve Manufacture Factory | API 6A | | |
| Boteli Valve Group Co., Ltd. | API 6A | | |
| Nanjing Enport Valve Manufacture Co., Ltd | API 6A 、6D | | |
| Shanghai JF Petroleum Machinery Co., Ltd. | API 6A、 6D ISO 9001、API Q1 | | |
| Zhejiang Wuzhou Valve Co.,Ltd | API 6A 、6D | | |
| Boteli Valve Group Co., Ltd. | API 6A 、6D | | |
| Frvalve (Suzhou) Corp. Ltd. | API 6A、 6D、CE | | |
| Shanghai Valve factory | API 6D | | |
| Shuangda Valve Co., LTD | API 6D | | |
| Shanghai Zhengfeng Valve Co., Ltd | API 6D | | |
| Zhejiang Ouqiu Valve Co.,Ltd | API 6D、Q1、ISO 9001、TS 29001 | | |
| Yancheng Dianzhan Valve factory | API 6D | | |
| Shanghai Koko Valve Co., Ltd. | API 6D | | |
| Kaifeng Ruifa High & Middle Pressure Valve Factory | API 6D | | |
| Nanjing Enport Valve Manufacture Co., Ltd | API 6D、6A | | |
| Jianhu East Valve Manufacturing Co., Ltd. | API 6D 602 | | |
| Suzhou Industrial Park Stard Valve Co., Ltd. | API 6D | | |
| Wuhan Boiler Group Valve Co., Ltd | API 6D | | |
| Shanghai Kaigong Valve Co.,Ltd | API 6D | | |
| Shanghai Mecco Valve Co., Ltd | API 6D | | |
| Shanghai Far East High & Medium Pressure Valve Co., Ltd. | API 6D | | |
| Hubei High & Middle Pressure Valve Co., Ltd | API 6D | | |
| Sichuan Saier Valve MFG Co., Ltd | API 6D | | |
| Tianjin Tiansheng Petroleum Pipe Manufacturing Co. | API 6D | | |
| Liaoning Zhonghe Science and technology Industry Co.,Ltd | API 6D | | |
| Jiangsu Province Changzhou Global Valve Plant | API 6D | | |
| Ningbo Xinsheng Valve Co.,Ltd | API 6D | | |
| Shanghai (Jinji Group) Jinji Valve Piping Mfg. Co., Ltd. | API 6D | | |
| Henan Gaoshan Valve Co., Ltd. | API 6D | | |
| Zhejiang Jingjia Valve Co., Ltd. | API 6D、CE | | |
| Shoulong metals Foundry Co.,Ltd | API 6D 、 ISO 14000 | | |
| Henan Kaifeng High Pressure Valve Co., Ltd. | API 6D 、 ISO 9001 | | |
| China Hebei Canghai Pipe Fitting Group Co. Ltd | API 6H、API Q1 PLUS | | |
| Mudanjiang Universal Downhole Tools Dier Factory | API 7 | | |
| Mudanjiang Hongda Petroleum Tools Co., Ltd | API 7 | | |
| Northwest General Rubber Factory | API 7K | | |
| Shanghai Weilun Machinery Co., Ltd. | API 7K | | |
| Shengli Oil Field Highland Petroleum Equipment Co., Ltd. | API 7K | | |
| Tianjin Pengzhan Steel Pipes Co., Ltd. | API 7K、8A | | |
| Jiangsu Xinxiang Petroleum Machinery Co., Ltd | API 7K、8A | | |
| Jiangsu Xinxiang Share Co., Ltd. | API 8C | | |
| Jiangsu Huaneng Cable Co., Ltd. | API 9A | | |
| Jiangsu Shenwang Metal Products Co., Ltd | API 9A | | |
| Angang Group Steel Wire Rope Co.,Ltd | API 9A | | |
| Jiangsu Fasten Co., Ltd | API 9A | | |
| Baotou Liande Oil and Mechanical Co., Ltd. | API 11B | | |
| Ruian Jusheng Machinery Co., Ltd. | API 11B | | |
| Shandong Laizhou Meizhong Machinery Co.,Ltd | API 11B | | |
| Zhejiang Weiqixin Oil and Mechanical Co., Ltd. | API 11D | | |
| MSP/Drilex | API 11E | | |
| Shandong Jinli biology manufacture Co.,Ltd | API 13A ISO 14000 | | |
| Drilling Technology Research Institute, Shengli Petroleum Administrative Bureau, SINOPEC | API 14A | | |
| Zhejiang Weiqixin Oil and Mechanical Co., Ltd. | API 14A、Q1、11D | | |
| Lianyungang Zhongfu Lianzhong Composites Group Co., Ltd | API 15HR | | |
| Shengli Oilfield Supply Fangyuan Petroleum Facility Co., Ltd. | API 16A、16C、6A | | |
| Yancheng Jigao Petroleum Machinery Co., Ltd | API 16C、 6A | | |
| Shanghai JF Petroleum Machinery Co., Ltd | API Q1 PLUS、API 6A、 6D | | |
| Wuxi Zhenda Special Steel Tube Manufacturing Co., Ltd | API Q1 Plus、 API 5CT 、5L | | |
| Jiangsu Yaxing Anchor Chain Co., Ltd | API Q1 Plus 、API 2F | | |
| Zhejiang Ouqiu Valve Co.,Ltd | API Q1 Plus、 API 6D | | |
| Jinan Magang Steel Pipe Manufacturing Co., Ltd. | API Q1 Plus | | |
| Yingkou Double Dragon Petroleum Equipment Co., Ltd. | API Q1、19B | | |
| Dafeng Anfei Cast Steel Factory | API Q1 Plus | | |
| Wuxi Zhenda Special Steel Tube Manufacturing Co., Ltd | API Q1、ISO 9001、TS 29001、API 5L、5CT | | |
| Hubei Hongcheng General Machinery Co., Ltd | API Q1、ISO 9001、TS 29001 | | |
| China Hebei Canghai Pipe Fitting Group Co. Ltd. | API Q1、ISO 9001、TS 29001、API 6H | | |
| Wuxi Xuelang Steel Group Co., Ltd | API Q1、ISO 9001、TS 29001 | | |
| Shengli Oil Field Highland Drill Tool Co., Ltd. | API Q1、ISO 9001 | | |
| Daqing Harvest Longwall High Pressure FRP Pipe Co., Ltd. | API Q1、15HR、ISO 9001、TS 29002 | | |
| Zhejiang Weiqixin Oil and Mechanical Co., Ltd. | API Q1、14A、11D、ISO 9001 、TS 29001 | | |
| Wuxi Seamless Steel Pipe Co.,Ltd | API Q1、5CT、5L、ISO 9001、TS 29001 |
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