截至2004年9月1日，中国已有293家企业通过API规范认证，这些企业的名单如下：
1st Machinery Works of North China Petroleum
3H (Shanghai) Petroleum Equipment Co., Ltd.
ABB Vetco Gray Petroleum Equipment (Shanghai) Co., Ltd.
Anhui Tunxi High Pressure Valve Factory
Anshan Aotong Steel Pipe Plant
Anshan Dragon Pipe Industries Co., Ltd.
Baoji Oilfield Machinery Co., Ltd.
Baoji Petroleum Steel Pipe Co., Ltd.
Baoji Rigor Petroleum Machinery Co. Ltd.
Baoji-SMI Petroleum Steel Pipe Corporation
Baoyi Valve Group Co., Ltd.
Beijing Petroleum Machinery Factory
Beric-Davis Companies International, Ltd.
Beric-Davis Companies International, Ltd.
Bohai NKK Drill Pipe Co., Ltd.
Bohai Oil Engineering Company
Boteli Valve Group Co., Ltd.
Cangzhou OCTG Co., Ltd. of Huabei Oilfield
Cangzhou Xinyuantai Steel Pipe Mill Co., Ltd.
Changge Yulong Pipe Products Co., Ltd.
Changqing Petroleum Exploration Bureau Machinery Manufacture Plant
Changshu Jichang Petroleum Machinery Manufacturing Co., Ltd.
Chengde Kingdream Petroleum Machinery Co. Ltd.
Chengdu Best Diamond Bit Co. Ltd.
Chengdu Chengfeng Valve Co., Ltd.
Chengdu Chuankong Valve Co., Ltd.
Chengdu High Pressure Valve Plant
Chengdu Mechanical Works of Sichuan Petroleum Administration
China Gaoneng Valve Co., Ltd.
China KCM Valve Co., Ltd.
China Liangjing Group Co., Ltd
China Oilfield Services Limited
China Shiyuan Valve Manufacturing Co., Ltd.
China South Valve Group Manufacture Co., Ltd.
China Sungo Valves Co., Ltd.
China Tefulong Group Co., Ltd.
China Zhongquan Group Co., Ltd.
China-Jiangnan Valve Co., Ltd
Chiwan Sembawang Engineering Co. Ltd.
Chongqing Xin Tai Machinery Ltd.
Chuannan Machinery Manufacturing Plant
Chuanyou Guanghan Honghua Co. Ltd.
Da Feng Valve Plant
Dagang Oilfield Group New Century Machinery Manufacturing Co., Ltd.
Dalian DV Valve Co., Ltd.
Dalian Marine Valve Factory
Daqing Honggang Drilling Tool Factory
Daqing Petroleum Equipment Group
Daqing Rijiu Centralizer Plant
Deyang Huadi Petroleum Equipment Co., Ltd.
Drilling & Production Equipment Plant of Sichuan Petroleum Administration
Drilling Engineering Technology Research Institute of Daqing Petroleum Administration Bureau
Drilling Technology Research Institute, Shengli Petroleum Administrative Bureau, SINOPEC
Drilling Tool Sub-company of Daqing Drilling Technology Services Company
Enflow Industries Inc.
Fenghua City High-Middle Pressure Valves Manufacture Co., Ltd.
Fenghua Hengtong Valves Co. Ltd
Fujian Sanming High & Middle Pressure Valve Factory
Fushun Cement Co. Ltd.
Gaoyou Huaxing Petroleum Manufacturing Co., Ltd.
General Machinery Plant of Shengli Petroleum Administration
Gezhouba Holding Company Cement Plant
Great Valve Manufacturing Co., Ltd.
Guanghan Petroleum Well-Control Equipment Co., Ltd.
Guangzhou Panyu District Dongsu Machinery Co., Ltd.
GuiZhou GaoFeng Machinery Factory
Guizhou Wire Rope Incorporated Company
Hangzhou Donghua Chain General Factory
Hebei Cangzhou Hengtong Tubing Co. Ltd
Heibei Zhongyuan Steel Pipe Manufacture Co., Ltd.
Heilongjiang North Shuangjia Drilling Tools Co., Ltd.
Henan Gaoshan Valve Co., Ltd.
Henan Petroleum Exploration Bureau Machinery Plant
Henan Shangdie Valve Co., Ltd.
Henan Zhongyuan Special Steel Works
Henan Zyzj Petroleum Equipment Co., Ltd.
Hubei Fuxing Science and Technology Co., Ltd.
Hunan Hengyang Steel Tube (Group) Co. Ltd.
Inner Mongolia No. 1 Machinery (Group) Co., Ltd.
Integrated Equipment, Inc.
Jiang Yin Eastern Valve Company, Ltd.
Jianghan Petroleum Machinery Plant
Jiangsu Chang-Bao Steel Tube Limited Co.
Jiangsu Chengde Steel Tube Share Co. Ltd.
Jiangsu Huaneng Cable Co., Ltd.
Jiangsu Jin Shi Machinery Group Co., Ltd.
Jiangsu Rudong General Machinery Company Limited
Jiangsu Rushi Machinery Co. Ltd
Jiangsu Shuguang Drilling Tool Co., LTD.
Jiangsu Shuguang Grant Prideco Tubular Co., Ltd.
Jiangsu Suyan Valve & Pipe Plant
Jiangsu Xianzhong Petroleum Machinery Co., Ltd.
Jiangsu Xinxiang Share Co., Ltd.
Jiangsu Yulong Steel Pipe Co., Ltd.
Jiangyin Chuangxin Oil Pipe Company Ltd.
Jiangyin Xingcheng Special Steel Works Co., Ltd.
Jianhu County Hongda Valve & Pipe Co., Ltd.
Jingbo Petroleum Machinery Plant
Jinxi Steel Pipe Co. Ltd of Lingyuan Iron and Steel Group
Jiyuan Petroleum Machinery Co., Ltd
Ju Long Steel Pipe Co. Ltd.
JUN Valve (Kunshan) Co., Ltd.
KF Industries, Inc.
Kingdom Precision Casting Co., Ltd.
KingDream Public Limited Company
KingDream Public Ltd Company Shanghai Branch
KTM Ball Valve Manufacturing (Sichuan) Co., Ltd.
Kunshan AB Valve Co. Ltd.
Kunshan Valve Co., Ltd.
Lanzhou General Machinery Plant
Lanzhou High Pressure Valve Limited Company
Lanzhou LS-National Oilwell Petroleum Engineering Company Limited
Lanzhou Petroleum & Chemical Machinery Works
Lianyungang Ocean Liquid Loading & Unloading Machine Co., Ltd.
Liaohe Oilfield General Machine Factory
Liaoning Dongyu Oil Pipe Manufacturing Co., Ltd.
Liaoning Jinxi (ASP) Steel Pipe Co. Ltd.
Liaoyang Spiral and Straight Seam Steel Tube Factory
Liaoyang Steel Tube Co., Ltd.
Liaoyang Xingde Large Steel Pipe Plant
Machinery Factory of Jilin Petroleum Group Co., Ltd.
Machinery Factory of Tuha Petroleum Exploration and Development Corporation
Machinery Factory of Tuha Petroleum Exploration and Development Corporation
MSP/Drilex
Mudanjiang City Oriental Diamond Bits Co., Ltd.
Mudanjiang Construction Material Petroleum Machinery Plant
Mudanjiang Petroleum Machinery Co., Ltd.
Mudanjiang Petroleum Tools Co., Ltd.
Mudanjiang Zhongyuan Drilling Co., Ltd.
Nanjing Luzhou Machine Works
Nantong Colves Fluid Control Co., Ltd.
Nantong High & Medium Pressure Valve Factory
Nantong Wire Rope (Group) Co., Ltd.
Nanyang Petroleum Machine Plant
Neway Valve (Suzhou) Co., Ltd.
Ningbo Mayer Steel Pipe Ltd.
Ningbo Sanding Steel Pipe Engineering Co., Ltd.
Ningxia Hengli Steel Wire Rope Co., Ltd.
Norms Engineering Co., Ltd.
North China Petroleum Steel Pipe Co. Ltd.
Northern Steel Pipe Co., Ltd.
Offshore Oil Engineering Co., Ltd.
Oil Well Cement Development Company, Zibo Zhongchang Special Cement Co, Ltd
Outong Group Co., Ltd. (Zhejiang Petrochemistry Valve Co., Ltd.)
P.T. Kvaerner Oilfield Products
Pangang Group Beihai Steel Pipe Corporation
Pangang Group Chengdu Iron & Steel Co., Ltd.
Panyu Chukong Steel Pipe Co., Ltd.
Power Machinery Works of Shengli Petroleum Administration
Precision Pipe Manufacturing Branch of Liaoning Tianyi Industry Co. Ltd.
Puyang City Shuangfa Industry Co., Ltd.
Puyang Zhongshi Group Co., Ltd.
Rongsheng Machinery Manufacture Ltd of Huabei Oilfield, Hebei
Sanmenxia Xinghe Petroleum Equipment Manufacture Co., Ltd.
Seamless Pipe Plant of Angang New Iron & Steel Co., Ltd., Angang Group Co.
Seamless Tube Mill of Baotou Steel Union Co., Ltd.
Shandong Huayin Special Cement Co. Ltd.
Shandong Longkou Special Rubber Hose Co., Ltd.
Shandong Molong Petroleum Machinery Co., Ltd.
Shanghai KVC Valve Co., Ltd.
Shanghai (Jinji Group) Jinji Valve Piping Mfg. Co., Ltd.
Shanghai Alison Steel Pipe Co., Ltd.
Shanghai Dalong Chains Works
Shanghai Fudi Valve Co., Ltd.
Shanghai Gaoneng High Pressure Valve Factory
Shanghai Huatong Valve Co., Ltd.
Shanghai Jinlun Mechanical Industry Co., Ltd.
Shanghai Kai-gong Valve Co., Ltd.
Shanghai Koko Valve Co., Ltd.
Shanghai Liang Gong Valve Factory
Shanghai Lixing Valve Manufacture Factory
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