| QINGDAO ZHUOER PIPE INDUSTRY LIMITED | Private company limited by shares | Live |
| Pipe of Insight Limited | Private company limited by shares | Dissolved |
| INSTUBE PIPE LIMITED | Private company limited by shares | Dissolved |
| MEI YUN TAT PIPE INTERNATIONAL LIMITED | Private company limited by shares | Live |
| ASIAN PIPE INTERNATIONAL LIMITED | Private company limited by shares | Live |
| YU YOU INTERNATIONAL PIPE CLUB LIMITED | Private company limited by shares | Live |
| ITALIAN PIPE OLD MAN INTERNATIONAL HOLDINGS LIMITED | | Live |
| Hydro Pipe International Limited | Private company limited by shares | Dissolved |
| LINED PIPE SYSTEM INTERNATIONAL GROUP LIMITED | Private company limited by shares | Live |
| INOUE PIPE MATERIAL INTERNATIONAL LIMITED | Private company limited by shares | Live |
| PETRO PIPE INTERNATIONAL LIMITED | Private company limited by shares | Live |
| ITALY ROME PIPE INTERNATIONAL LIMITED | Private company limited by shares | Live |
| International Pipe & Steel Services Limited | Private company limited by shares | Dissolved |
| BRITAIN JOYKING PIPE INT'L GROUP LIMITED | Private company limited by shares | Dissolved |
| FRANCE OLD TOBACCO PIPE INT'L DRESS LIMITED | Private company limited by shares | Dissolved |
| PIPE (INT'L) GROUP LIMITED | Private company limited by shares | Dissolved |
| HK HUAYI LIANSU INT'L PIPE R&D LIMITED | Private company limited by shares | Live |
| FOSHAN JIUMU INT'L PIPE INDUSTRY LIMITED | Private company limited by shares | Live |
| ITALY PIPE INT'L GROUP LIMITED | Private company limited by shares | Live |
| RICHFINE INT'L PIPE CO., LIMITED | Private company limited by shares | Dissolved |
| PIPE TECHNOLOGY SHIDONGHUIBOTIAN INT'L LIMITED | Private company limited by shares | Live |
| FRANCE SMOKE PIPE INT'L LIMITED | Private company limited by shares | Dissolved |
| PIPE JACKING SPECIALIST ENGINEERING LIMITED | Private company limited by shares | Live |
| JETROD PIPE REHABILITATION COMPANY LIMITED | Private company limited by shares | Dissolved |
| SHANGHAI JIANGLIN PIPE INDUSTRY LIMITED | Private company limited by shares | Dissolved |
| JIANGSU JINNIU PIPE INDUSTRY CO., LIMITED | Private company limited by shares | Live |
| JIANGSU RIFENG PIPE INDUSTRY CO., LIMITED | Private company limited by shares | Live |
| SHANGHAI JIEHONG PIPE INDUSTRY COMPANY LIMITED | Private company limited by shares | Dissolved |
| SHANGHAI JIEJIANG PIPE FITTING CO., LIMITED | Private company limited by shares | Live |
| GERMANY JIESHUI PIPE TECHNOLOGY LIMITED | Private company limited by shares | Live |
| HK JINGJIE RIFENG PIPE INDUSTRY LIMITED | Private company limited by shares | Dissolved |
| SHANGHAI JINLIN PIPE INDUSTRY CO., LIMITED | Private company limited by shares | Dissolved |
| SHANGHAI JINNUODA PLASTIC PIPE INDUSTRY LIMITED | Private company limited by shares | Dissolved |
| SHANGHAI JINNUODA PIPE MATERIALS LIMITED | Private company limited by shares | Dissolved |
| JONSTEEL PIPE AND FITTING CO., LIMITED | Private company limited by shares | Live |
| CANGZHOU JUNTAI PIPE PRODUCTS CO., LIMITED | Private company limited by shares | Live |
| Tong Kang Pipe Fittings Co., Limited | Private company limited by shares | Live |
| KANG DA PIPE FITTINGS CO., LIMITED | Private company limited by shares | Live |
| KANGLE PIPE INDUSTRY CO., LIMITED | Private company limited by shares | Live |
| PIPE OLD KING (FRANCE) CLOTHES GROUP LIMITED | Private company limited by shares | Dissolved |
| PIPE OLD KING (FRANCE) CLOTHES GROUP LIMITED | Private company limited by shares | Live |
| Pipe King International Co., Limited | Private company limited by shares | Live |
| Shanghai Bull King Pipe Industry Limited | Private company limited by shares | Live |
| HK PIPE KING INT'L COMPANY LIMITED | Private company limited by shares | Dissolved |
| PIPE KING METAL PRODUCT CO., LIMITED | Private company limited by shares | Live |
| PIPE KING TRADING CO., LIMITED | Private company limited by shares | Live |
| ITALY TOBACCO PIPE LEATHER (INT'L) LIMITED | Private company limited by shares | Dissolved |
| PIPE LOGISTICS CO., LIMITED | Private company limited by shares | Live |
| LONGKOU PIPE ENTERPRISE CO., LIMITED | Private company limited by shares | Dissolved |
| Jiangyin Longshan Pipe Fitting Co., Limited | Private company limited by shares | Live |
| SUDA PLASTIC PIPE MACHINERY CO., LIMITED | Private company limited by shares | Live |
| SUNRISE PIPE MACHINERY LIMITED | Private company limited by shares | Live |
| SHANGHAI JINLIN PIPE MANUFACTURE CO., LIMITED | Private company limited by shares | Live |
| SHANGHAI LONGLIDA PIPE MANUFACTURE CO., LIMITED | Private company limited by shares | Live |
| SHANGHAI JINDE PIPE MANUFACTURE CO., LIMITED | Private company limited by shares | Live |
| Mario Pipe Limited | Private company limited by shares | Live |
| SUCCESSFULMAN PIPE MARKETING (HK) LIMITED | Private company limited by shares | Live |
| PIPE MASTER LIMITED | Private company limited by shares | Live |
| SHANGHAI RIFENG PIPE MATERIAL TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| Kingstone Valve And Pipe Material Co., Limited | Private company limited by shares | Live |
| RIFENG NEW PIPE MATERIALS LIMITED | Private company limited by shares | Dissolved |
| HK MEIDE PIPE CO., LIMITED | Private company limited by shares | Live |
| SHANGHAI MEIERGU PIPE INDUSTRY LIMITED | Private company limited by shares | Live |
| SHANGHAI JS MEIERGU PIPE INDUSTRY LIMITED | Private company limited by shares | Dissolved |
| GREENTINS METAL PIPE INDUSTRIAL COMPANY LIMITED | Private company limited by shares | Live |
| CHINA PLASTIC PIPE MUSEUM LIMITED | Private company limited by shares | Live |
| National Plastic Pipe Company Limited | Private company limited by shares | Live |
| HK NOBLE PIPE DRESS INT'L (GROUP) LIMITED | Private company limited by shares | Dissolved |
| ZHEJIANG NORTH SEA PIPE INDUSTRY CO., LIMITED | Private company limited by shares | Dissolved |
| Orient Pipe Limited | Private company limited by shares | Dissolved |
| GERMANY OUPU PIPE LIMITED | Private company limited by shares | Live |
| PACIFIC PIPE COMPANY LIMITED | Private company limited by shares | Dissolved |
| HK PEARL PIPE INDUSTRY LIMITED | Private company limited by shares | Dissolved |
| CANGZHOU PENGKUN PIPE PROJECT CO., LIMITED | | Live |
| PETROLEUM PIPE CO. LIMITED | Private company limited by shares | Live |
| Tianhe Oil Drill Pipe Petroleum Co. Limited | Private company limited by shares | Dissolved |
| WeiMa Petroleum Drill Pipe Co. Limited | Private company limited by shares | Dissolved |
| CHINA PETROLEUM PIPE & SAND CONTROL COMPANY LIMITED | Private company limited by shares | Dissolved |
| KA MING PLASTIC PIPE COMPANY LIMITED | Private company limited by shares | Dissolved |
| ASIAN PRESSURE PIPE (H.K.) LIMITED | Private company limited by shares | Dissolved |
| HWA YIU PIPE PRODUCTION COMPANY LIMITED | Private company limited by shares | Dissolved |
| JIANGSU BENQIU PIPE PRODUCTS CO., LIMITED | Private company limited by shares | Dissolved |
| RIFENG WATER PURIFYING PIPE (HANGZHOU) CO., LIMITED | Private company limited by shares | Live |
| PERFECTECH RIGID (PVC) PIPE MANUFACTURING LIMITED | Private company limited by shares | Live |
| QIONGYAO PIPE (CHINA) LIMITED | Private company limited by shares | Live |
| BUDA PIPE REHAB. & ENG. CO., LIMITED | Private company limited by shares | Live |
| CHINESE PIPE REPRESENTATIVES COMPANY LIMITED | Private company limited by shares | Dissolved |
| A. S. PIPE REVIVING ( HK ) LIMITED | Private company limited by shares | Dissolved |
| SHANGHAI JINLU RIFENG PIPE INDUSTRY LIMITED | Private company limited by shares | Live |
| ITALY ROYAL PIPE FINERY LIMITED | Private company limited by shares | Live |
| SANLIN PIPE COMPONENTS CO., LIMITED | Private company limited by shares | Live |
| JILIN SENFENG PIPE CO., LIMITED | Private company limited by shares | Live |
| Pipe Service Limited | Private company limited by shares | Live |
| Irwin Pipe Fitting Services HK Limited | | Live |
| Shandong Pipe Company Limited | Private company limited by shares | Live |
| SHANGHAI JINDESHUN PIPE CO., LIMITED | Private company limited by shares | Live |
| SHANGHAI JIUMU PIPE CO., LIMITED | Private company limited by shares | Live |
| Shanghai Liansu Pipe Co., Limited | Private company limited by shares | Live |
| SHANGHAI NANBING PIPE CO., LIMITED | Private company limited by shares | Dissolved |
| Shanghai Pilsa Pipe Co., Limited | Private company limited by shares | Live |