| New Pipeline Limited | Private company limited by shares | Live |
| PIPELINE LIMITED | Private company limited by shares | Live |
| AFRICA PIPELINE COMPANY LIMITED | Private company limited by shares | Live |
| AGRU Pipeline Technology (Hong Kong) Limited | | Live |
| Asian American Pipeline Limited | Private company limited by shares | Live |
| Atlantic Pipeline Limited | Private company limited by shares | Live |
| Cangzhou Yongguan Pipeline Equipment Manufacturing Co., Limited | Private company limited by shares | Dissolved |
| GERMANY CEIDO PIPELINE SYSTEM GMBH LIMITED | | Live |
| Celebrated Pipeline Limited | Private company limited by shares | Live |
| PIPELINE CLOTHING COMPANY LIMITED -THE- | Private company limited by shares | Dissolved |
| FLK PIPELINE CO., LIMITED | Private company limited by shares | Live |
| RIFENG PIPELINE HANGZHOU CO., LIMITED | Private company limited by shares | Live |
| HENGTAI PIPELINE CO., LIMITED | | Live |
| HENGTAI PIPELINE CO., LIMITED | | Live |
| CHINA COMMUNICATION PIPELINE CONSTRUCTION HOLDINGS (HONGKONG) CO., LIMITED | Private company limited by shares | Live |
| Paisen Pipeline Equipment (Hong Kong) Co., Limited | | Live |
| SUZHOU JINNIU PIPELINE (HONG KONG) CO., LIMITED | Private company limited by shares | Live |
| HONG KONG ZHENGDAO OFFSHORE PIPELINE TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| VAST IRON PIPELINE CO., LIMITED | Private company limited by shares | Live |
| JINSHENG PIPELINE CO., LIMITED | | Live |
| Oil and Gas Pipeline Engineering Quality Inspection Association Co., Limited | Private company limited by shares | Live |
| MIDDLE EAST PIPELINE TECHNOLOGY & SERVICE CO., LIMITED | Private company limited by shares | Dissolved |
| PIPELINE CONTRACTORS LIMITED | Private company limited by shares | Dissolved |
| DEREK PIPELINE SERVICE COMPANY LIMITED | Private company limited by shares | Live |
| PIPELINE DRAINAGE LIMITED | Private company limited by shares | Live |
| EMPEROR PIPELINE REHABILITATION LIMITED | Private company limited by shares | Live |
| C M PIPELINE ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| USA GENERAL PIPELINE LIMITED | Private company limited by shares | Live |
| GERMANY FURUIDE PIPELINE LIMITED | Private company limited by shares | Live |
| GERMANY JO HLER PIPELINE LIMITED | | Live |
| GERMANY AUX PIPELINE SYSTEM LIMITED | Private company limited by shares | Live |
| GLOBAL PIPELINE RESOURCES LIMITED | Private company limited by shares | Live |
| HANGZHOU (SHUANGLIN GROUP) HAOJIE PIPELINE INDUSTRY LIMITED | Private company limited by shares | Dissolved |
| SHANGHAI JINNIU ANTIFREEZE GROUP PIPELINE INDUSTRY CO., LIMITED | Private company limited by shares | Live |
| Hang On Pipeline Engineering Limited | Private company limited by shares | Live |
| HING YIP PIPELINE SERVICE LIMITED | Private company limited by shares | Live |
| Innovation Pipeline Limited | Private company limited by shares | Dissolved |
| JINNIU PIPELINE LIMITED | Private company limited by shares | Live |
| FUJIAN JIUMU PIPELINE CO., LIMITED | Private company limited by shares | Live |
| Germany Knight Pipeline and Link System (Asia Pacific) Limited | Private company limited by shares | Live |
| PipeLine Machinery Hong Kong, Limited | Private company limited by shares | Live |
| Trans-Asia Pipeline (Hong Kong) Company Limited | Private company limited by shares | Live |
| LEADER TEK PIPELINE ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| MARINE PIPELINE VALVES LIMITED | Private company limited by shares | Live |
| FLK PIPELINE MATERIALS CO., LIMITED | Private company limited by shares | Live |
| MIDAS PIPELINE COMPANY LIMITED | Private company limited by shares | Live |
| Nantong China Resources Natural Gas Pipeline (Hong Kong) Limited | Private company limited by shares | Live |
| GERMANY OSRAM PIPELINE LIMITED | Private company limited by shares | Live |
| CHINA PETROLEUM PIPELINE BUREAU (HONG KONG) COMPANY LIMITED | Private company limited by shares | Live |
| POLY-GCL Pipeline (Hong Kong) Limited | Private company limited by shares | Live |
| Plastic Pipeline Products Limited | Private company limited by shares | Dissolved |
| QINGDAO RIFENG PIPELINE LIMITED | Private company limited by shares | Live |
| SAM PIPELINE REHABILITATION LIMITED | Private company limited by shares | Live |
| HK RIFENG PIPELINE RESEARCH & INVENTION LIMITED | Private company limited by shares | Dissolved |
| RIFENG NEW PIPELINE LIMITED | Private company limited by shares | Dissolved |
| PIERSA Pipeline (Shanghai) Co., Limited | | Live |
| SHANGHAI JINNIU PIPELINE LIMITED | Private company limited by shares | Live |
| SHANGHAI PIERSA PIPELINE PLASTIC LIMITED | Private company limited by shares | Live |
| SHANGHAI PILSA PIPELINE LIMITED | Private company limited by shares | Live |
| SHANGHAI RIFENG PIPELINE LIMITED | Private company limited by shares | Live |
| SHANGHAI HUAYA PIPELINE TECHNOLOGY LIMITED | Private company limited by shares | Live |
| SHANGHAI JINNIU PIPELINE TECHNOLOGY LIMITED | Private company limited by shares | Live |
| SHANGHAI RIFENG TECHNOLOGY PIPELINE LIMITED | Private company limited by shares | Live |
| SHANGHAI JINNIU NEW TYPE PIPELINE LIMITED | Private company limited by shares | Live |
| Pipeline Solutions Limited | Private company limited by shares | Live |
| TALENT PIPELINE ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| Pipeline Technologies Limited | Private company limited by shares | Live |
| IP PIPELINE TECHNOLOGY LIMITED | | Live |
| UK BOKWELL PIPELINE TECHNOLOGY LIMITED | Private company limited by shares | Live |
| EXCELLENT PIPELINE TECHNOLOGY & ENGINEERING LIMITED | Private company limited by shares | Live |
| HK JINNIU NEW PIPELINE TECHNOLOGY LIMITED | Private company limited by shares | Live |
| HK JIUMU PIPELINE TECHNOLOGY LIMITED | Private company limited by shares | Live |
| MAGPLANE PIPELINE TECHNOLOGY IM LIMITED | Private company limited by shares | Live |
| QINGDAO RIFENG PIPELINE TECHNOLOGY LIMITED | Private company limited by shares | Live |
| JINNIU SUYE PIPELINE TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Pipeline Tool & Die Limited | Private company limited by shares | Live |
| Pipeline Tooling Limited | Private company limited by shares | Live |
| Pipeline Trading Limited | Private company limited by shares | Dissolved |
| WISESON PIPELINE ENGINEERING LIMITED | Private company limited by shares | Live |
| OIL & GAS PIPELINES LIMITED | Private company limited by shares | Live |
| GUANGDONG RICHFUL PIPELINES LIMITED | Private company limited by shares | Dissolved |
| CHINA PIPELINES TECHNOLOGY NETWORK COMPANY LIMITED | Private company limited by shares | Live |