| ZHEJIANG YAANG PIPE INDUSTRY CO., LIMITED | Private company limited by shares | Live |
| ZHEJIANG DAJIANG PIPE INDUSTRY CO., LIMITED | Private company limited by shares | Dissolved |
| ZHEJIANG HANGBO PIPE INDUSTRY CO., LIMITED | | Live |
| ZHEJIANG JINBA PIPE INDUSTRY CO., LIMITED | Private company limited by shares | Live |
| ZHEJIANG LIANGJIE PIPE INDUSTRY CO., LIMITED | Private company limited by shares | Live |
| JETON PIPE FITTINGS CO., LIMITED | Private company limited by shares | Live |
| JIANGSU HANSU PIPE CO., LIMITED | Private company limited by shares | Live |
| JIANGSU GONGNIU PIPE TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| KINGWAY PIPE CO., LIMITED | Private company limited by shares | Live |
| ZHEJIANG LONGYUE PIPE INDUSTRIAL CO., LIMITED | Private company limited by shares | Dissolved |
| He Bei Sloate Petroleum Pipe Manufacturing Co., Limited | | Live |
| OUTSTANDING PIPE PRODUCTS CO., LIMITED | | Live |
| BONROY PIPE RACK CO., LIMITED | Private company limited by shares | Live |
| ITALY SAAVI PIPE CO., LIMITED | | Live |
| SHANDONG DONGHONG PIPE INDUSTRY CO., LIMITED | | Live |
| SHANDONG HAILI PIPE TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| SHANGHAI LITONG PIPE TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| TAIWAN PIPE INDUSTRY TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| BOHAI PIPE VALVE CO., LIMITED | Private company limited by shares | Live |
| ZHEJIANG GANGDIE PIPE CO., LIMITED | Private company limited by shares | Dissolved |
| ZHEJIANG XINNIU PIPE CO., LIMITED | Private company limited by shares | Live |
| Jun Yi Coated Pipe Limited | Private company limited by shares | Live |
| PACIFIC PIPE COATING COMPANY LIMITED | Private company limited by shares | Live |
| SECURE PIPE CONNECTIONS LIMITED | Private company limited by shares | Dissolved |
| TONG TAT CONSTRUCTION & PIPE LIMITED | Private company limited by shares | Live |
| Wagner Pipe Construction HK Company Limited | Private company limited by shares | Live |
| LIDA COPPER PIPE INDUSTRIAL LIMITED | Private company limited by shares | Live |
| MIRACLE CREATION PIPE GROUP LIMITED | Private company limited by shares | Dissolved |
| HONG KONG PIPE TECHNOLOGY DEVELOPMENT LIMITED | Private company limited by shares | Live |
| BIG DIPPER PIPE INDUSTRY CO., LIMITED | Private company limited by shares | Dissolved |
| DOUBLE PIPE PUBLISHERS LIMITED | Private company limited by shares | Live |
| PIPE DREAMS ARE NOT LIMITED | Private company limited by shares | Live |
| EASTWARD PIPE COOPERATION LIMITED | Private company limited by shares | Live |
| TAT SUN PIPE ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| ADVANCED PIPE ENGINEERING LIMITED | Private company limited by shares | Live |
| HANG TAT PIPE ENGINEERING LIMITED | Private company limited by shares | Live |
| WINNING LINED PIPE ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| KAM YUEN PIPE AND ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| Chevalier Pipe Equipment Limited | Private company limited by shares | Dissolved |
| HEBEI HORSE PIPE EQUIPMENT CO., LIMITED | Private company limited by shares | Dissolved |
| FRANCE FALA PIPE GROUP LIMITED | Private company limited by shares | Dissolved |
| FRENCH PIPE FASHION LIMITED | Private company limited by shares | Dissolved |
| SHANGHAI FAXIANG PIPE INDUSTRY LIMITED | Private company limited by shares | Live |
| FENG CAI PLASTIC PIPE LIMITED | | Live |
| BS PIPE & FITTING LIMITED | Private company limited by shares | Live |
| TG PIPE FITTING CO., LIMITED | Private company limited by shares | Live |
| HK BEST PIPE FITTING CO., LIMITED | Private company limited by shares | Live |
| JINSHENG PIPE FITTING CO., LIMITED | Private company limited by shares | Live |
| FVPS FITTING & VALVE & PIPE SUPPLY LIMITED | Private company limited by shares | Dissolved |
| WENZHOU LIANGGANG PIPE FITTING VALVE LIMITED | | Live |
| SHANGHAI RUGE PIPE FITTING COMPANY LIMITED | Private company limited by shares | Live |
| WENZHOU XIONGLI PIPE FITTING CO., LIMITED | Private company limited by shares | Dissolved |
| HK DUCKY WIN PIPE FITTINGS LIMITED | Private company limited by shares | Live |
| Yongxing High Pressure Flange Pipe Fittings Co., Limited | Private company limited by shares | Live |
| Guanghao Pipe Fittings Company Limited | | Live |
| FLYING DRAGON PIPE SERVICE LIMITED | Private company limited by shares | Live |
| Forever pipe Industry Co., Limited | Private company limited by shares | Live |
| FOREVER PIPE INDUSTRY CO., LIMITED | | Live |
| FRANCE PIPE GARMENT GROUP LIMITED | Private company limited by shares | Dissolved |
| Liansu pipe group (Germany) co., Limited | Private company limited by shares | Live |
| JINDE PIPE GROUP (GERMANY) CO., LIMITED | Private company limited by shares | Live |
| WEIXING PIPE GROUP (GERMANY) CO., LIMITED | Private company limited by shares | Live |
| GLOBE PIPE AND FITTING CO., LIMITED | Private company limited by shares | Live |
| GOLD PIPE LIMITED | Private company limited by shares | Live |
| GOLDEN PIPE LIMITED | Private company limited by shares | Dissolved |
| HK GOLDEN PIPE FINERY LIMITED | Private company limited by shares | Dissolved |
| GOLDEN PIPE INVESTMENTS LIMITED | Private company limited by shares | Dissolved |
| ITALY GOLDEN PIPE (H.K.) INTERNATIONAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| GUANGZHOU GONGNIU PIPE CO., LIMITED | Private company limited by shares | Live |
| GOOD PIPE CO., LIMITED | Private company limited by shares | Live |
| China Pipe Group Limited | Private company limited by shares | Live |
| China Pipe Network Group Co., Limited | | Live |
| GERMANY FUSIOTHERM PIPE GROUP LIMITED | Private company limited by shares | Live |
| CHINA GONGYUAN(SHANGHAI) PIPE GROUP LIMITED | Private company limited by shares | Live |
| HUAHAI PIPE FITTINGS GROUP LIMITED | Private company limited by shares | Live |
| SHANXI GUOLIAN PIPE INDUSTRY GROUP COMPANY LIMITED | Private company limited by shares | Live |
| HK JINNIU TECHNOLOGY PIPE INDUSTRY GROUP LIMITED | Private company limited by shares | Live |
| HK JINNIU TECHNOLOGY PIPE INDUSTRY GROUP LIMITED | | Live |
| ITALY PIPE GROUP (HK) FINERY LIMITED | Private company limited by shares | Dissolved |
| HK JINNIU PIPE GROUP LIMITED | Private company limited by shares | Live |
| USA KINGDAY PIPE GROUP LIMITED | Private company limited by shares | Dissolved |
| ZHEJIANG SUNMOO PIPE (GROUP) LIMITED | Private company limited by shares | Live |
| SYNDA PIPE GROUP LIMITED | Private company limited by shares | Live |
| Guangdong jinniu pipe co., Limited | Private company limited by shares | Live |
| GUANGZHOU YUEDA PIPE CO., LIMITED | Private company limited by shares | Dissolved |
| GUANGZHOU FORTUNE PIPE SHOES LIMITED | Private company limited by shares | Dissolved |
| GERMANY GUSHITE PIPE CO., LIMITED | Private company limited by shares | Live |
| HANGZHOU RIFENG PIPE CO., LIMITED | Private company limited by shares | Live |
| HANGZHOU CHAOFENG PIPE INDUSTRY COMPANY LIMITED | Private company limited by shares | Dissolved |
| HANGZHOU RIFENG JIULIAN PIPE INDUSTRY LIMITED | Private company limited by shares | Dissolved |
| HANGZHOU RIFENG NEW PIPE MATERIALS LIMITED | Private company limited by shares | Live |
| HANGZHOU RIFENG PIPE MATERIALS TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| Hangzhou Rifeng Plastic Pipe Co., Limited | | Live |
| HANGZHOU YONGRUN AIKANG PIPE CO., LIMITED | Private company limited by shares | Live |
| WING LEE PIPE AND HARDWARE LIMITED | | Live |
| ITALY PIPE OLDMEN HEAD FASHION LIMITED | Private company limited by shares | Dissolved |
| Hebei Yanshan County Dianli Pipe Fitting Co., Limited | Private company limited by shares | Live |
| HEBEI AORUN PIPE FITTING CO., LIMITED | | Live |
| HEBEI DINGSHENG PIPE INDUSTRY CO., LIMITED | Private company limited by shares | Live |
| HEBEI SENHAI PIPE LINE CO., LIMITED | Private company limited by shares | Live |