| 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 |
| Niujin Pipe Co., Limited | | 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 |
| SHANGHAI JIUMU PIPE GROUP LIMITED | Private company limited by shares | Dissolved |
| SHANGHAI HUIDA PIPE COMPANY LIMITED | Private company limited by shares | Live |
| SHANGHAI RIFENG NEOTYPE PIPE LIMITED | Private company limited by shares | Live |
| SHANGHAI PIERSA NOVEL PIPE LIMITED | Private company limited by shares | Dissolved |
| SHANGHAI JIA QIANG PIPE LIMITED | Private company limited by shares | Live |
| SHANGHAI RIFENG PIPE LIMITED | Private company limited by shares | Dissolved |
| ZHEJIANG SHANGPIN JINNIU PIPE INDUSTRY LIMITED | Private company limited by shares | Live |
| China Shangxin Pipe Industry Group Company Limited | Private company limited by shares | Live |
| SHENG MIN PIPE LIMITED | Private company limited by shares | Live |
| JIUMU THE PIPE (SHENZHENG) CO., LIMITED | Private company limited by shares | Live |
| HK SHINEWAY PIPE LIMITED | Private company limited by shares | Dissolved |
| CHI SING PLASTIC PIPE LIMITED | Private company limited by shares | Dissolved |
| CHI SING PLASTIC PIPE LIMITED | Private company limited by shares | Dissolved |
| SINO GREEN PIPE CO., LIMITED | Private company limited by shares | Live |
| SINO PIPE GROUP HOLDINGS CO., LIMITED | | Live |
| SMLSCO PIPE LIMITED | | Live |
| SOOCHOW CENTURY RIFENG PIPE INDUSTRY LIMITED | Private company limited by shares | Live |
| TAK FAI SPIRAL PIPE MANUFACTURER LIMITED | Private company limited by shares | Dissolved |
| HARBOUR STAINLESS PIPE MANUFACTURING LIMITED | Private company limited by shares | Dissolved |
| PIPE SUCCESS LIMITED | Private company limited by shares | Dissolved |
| SUNNY OIL PIPE COMPANY LIMITED | Private company limited by shares | Dissolved |
| PIPE & PILING SUPPLIES LIMITED | Private company limited by shares | Dissolved |
| HELSINKI SEAMLESS PIPE SUPPLY CO. LIMITED | Private company limited by shares | Dissolved |
| TAIWAN DONGSENG PIPE INDUSTRY LIMITED | Private company limited by shares | Live |
| Taiying Pipe Co., Limited | | Live |
| SD PIPE TECH LIMITED | Private company limited by shares | Dissolved |
| PIPE TECH LIMITED | Private company limited by shares | Live |
| I PIPE TECHNOLOGIES LIMITED | Private company limited by shares | Live |
| DICKAN PIPE TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| I PIPE TECHNOLOGIES & ENGINEERING LIMITED | Private company limited by shares | Live |
| METROPOLITAN PIPE TECHNOLOGIES LIMITED | Private company limited by shares | Live |
| Germany Adison Pipe Technology Co., Limited | Private company limited by shares | Live |
| Germany Frand Pipe Technology Co., Limited | Private company limited by shares | Live |
| BROFIT PIPE FITTINGS TECHNOLOGY LIMITED | | Live |
| GUANGDONG LANSHENG PIPE TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| GERMANY NENUEN PIPE TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| SHANGHAI HALEY PIPE TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| ZHEJIANG BULL PIPE TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| ZHEJIANG BULL PIPE TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| ZHEJIANG QINGFA PIPE TECHNOLOGY LIMITED | | Live |
| THYSSEN PIPE CO., LIMITED | Private company limited by shares | Live |
| PIPE TRADERS INTERNATIONAL LIMITED | Private company limited by shares | Live |