| LIK KAR PVC PIPE CO. LIMITED | Private company limited by shares | Live |
| EDA PIPE COMPANY LIMITED | Private company limited by shares | Dissolved |
| JIN PIPE LIMITED | Private company limited by shares | Dissolved |
| JIN PIPE LIMITED | Private company limited by shares | Live |
| pipe it up Limited | Private company limited by shares | Live |
| GERMANY AINUOSHI PIPE COMPANY LIMITED | Private company limited by shares | Live |
| AODU PIPE GARMENTS (FRANCE) GROUP LIMITED | Private company limited by shares | Dissolved |
| ITALY MR PIPE APPAREL CO., LIMITED | Private company limited by shares | Live |
| AUTO PIPE RACING LIMITED | Private company limited by shares | Dissolved |
| Hong Kong St. Andrew's Pipe Band Limited | Private company limited by shares | Dissolved |
| BEIJING HONGYU PLASTIC PIPE INDUSTRY LIMITED | Private company limited by shares | Live |
| BEIJING JINKE RIFENG PIPE INDUSTRY LIMITED | Private company limited by shares | Live |
| BEIJING LIANTONG RIFENG PIPE INDUSTRY LIMITED | Private company limited by shares | Live |
| BEIJING PIERSA PIPE INDUSTRY LIMITED | Private company limited by shares | Live |
| BEIJING RIFENG PLASTIC PIPE INDUSTRY LIMITED | Private company limited by shares | Live |
| BEIJING QUNTONG RIFENG PIPE INDUSTRY LIMITED | Private company limited by shares | Live |
| BEIJING ZHONGKE RIFENG PIPE INDUSTRY LIMITED | Private company limited by shares | Live |
| BEIJING SHENGHUI PIPE INDUSTRY LIMITED | Private company limited by shares | Live |
| BEIJING JINSHUISHANG PIPE INDUSTRY TECHNOLOGY LIMITED | Private company limited by shares | Live |
| BEIJING RIFENG PIPE INDUSTRY TECHNOLOGY LIMITED | Private company limited by shares | Live |
| BEIJING XIANGXIU PIPE INDUSTRY LIMITED | Private company limited by shares | Live |
| BEIJING JINNIU PIPE LIMITED | Private company limited by shares | Live |
| BEIJING LANXING PIPE INDUSTRY LIMITED | Private company limited by shares | Live |
| BEIJING QIDA PLASTIC PIPE LIMITED | Private company limited by shares | Live |
| BEIJING BULL PIPE TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| BOYUE PIPE & FITTING CO., LIMITED | Private company limited by shares | Dissolved |
| BOYUE PIPE AND FITTING CO., LIMITED | Private company limited by shares | Live |
| BROAD WAY PIPE & FITTING LIMITED | Private company limited by shares | Live |
| BUDA PIPE REHABILITATION & ENGINEERING CO. LIMITED | Private company limited by shares | Live |
| POLY PIPE BUILDING PRODUCTS LIMITED | Private company limited by shares | Dissolved |
| SHANGHAI CADIER PIPE CO., LIMITED | | Live |
| CANGZHOU WEIHENG PIPE CO., LIMITED | | Live |
| GUANG JIN CASTING PIPE COMPANY LIMITED | Private company limited by shares | Dissolved |
| CHENGHE PIPE HONGKONG LIMITED | Private company limited by shares | Dissolved |
| BANGYE PIPE GROUP (CHINA) LIMITED | Private company limited by shares | Dissolved |
| GERMANY OUBEIDE PIPE (CHINA) LIMITED | Private company limited by shares | Live |
| PRD-WINGSHING METAL SPIRAL PIPE (CHINA) COMPANY LIMITED | Private company limited by shares | Dissolved |
| SHANGHAI CHUANGWEI PIPE INDUSTRY CO., LIMITED | Private company limited by shares | Live |
| HK CHUANLU PLASTIC PIPE INDUSTRY LIMITED | Private company limited by shares | Dissolved |
| SKOOG PIPE CIRCLE HONG KONG LIMITED | Private company limited by shares | Live |
| CITY PIPE TECHNOLOGIES (HONG KONG) LIMITED | Private company limited by shares | Live |
| CITY PIPE TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| City Pipe Technology Limited | Private company limited by shares | Live |
| PP Pipe Cleaning Company Limited | Private company limited by shares | Live |
| ACME PIPE CLEANING COMPANY LIMITED | Private company limited by shares | Dissolved |
| TFF PIPE CO., LIMITED | | Live |
| AMATYP PIPE CO., LIMITED | Private company limited by shares | Live |
| CANGZHOU SHENLONG PIPE MANUFACTURING CO., LIMITED | Private company limited by shares | Live |
| CHENGDE PIPE CO., LIMITED | | Live |
| CHANGZHOU DABUND PIPE CO., LIMITED | | Live |
| BIG DIPPER PIPE INDUSTRY GROUP CO., LIMITED | Private company limited by shares | Live |
| Elite pipe Co., Limited | Private company limited by shares | Live |
| PIPE & FITTING TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| Zhejiang Aea Valve & Pipe Fitting Co., Limited | Private company limited by shares | Live |
| WEIFANG QIANCHENG PIPE FITTING CO., LIMITED | Private company limited by shares | Live |
| WUZHOU FLANGE PIPE FITTING CO., LIMITED | Private company limited by shares | Live |
| YIDA JINDING PIPE FITTING CO., LIMITED | Private company limited by shares | Live |
| M & D Pipe Fittings Co., Limited | Private company limited by shares | Dissolved |
| APCO PIPE FITTINGS CO., LIMITED | Private company limited by shares | Live |
| HAITIAN PIPE FITTINGS CO., LIMITED | Private company limited by shares | Live |
| XIN LONG PIPE FITTINGS CO., LIMITED | Private company limited by shares | Live |
| Q.D. PIPE FITTINGS CO., LIMITED | Private company limited by shares | Live |
| GERMANY GOOFEE PIPE CO., LIMITED | Private company limited by shares | Live |
| GERMANY RICH SHENG PIPE CO., LIMITED | Private company limited by shares | Live |
| GOLD PIPE GROUP CO., LIMITED | Private company limited by shares | Live |
| Yuantaiderun Pipe Group Co., Limited | Private company limited by shares | Live |
| Hebei Xinlian Petroleum Pipe Co., Limited | Private company limited by shares | Live |
| HEBEI WANRUI PIPE FITTING CO., LIMITED | | Live |
| HONG KONG LINK PIPE CO., LIMITED | Private company limited by shares | Live |
| ZHEJIANG JIUMU PIPE INDUSTRIAL CO., LIMITED | Private company limited by shares | Live |
| HK JINNIU PIPE INDUSTRY DEVELOP CO., LIMITED | Private company limited by shares | Live |
| GERMANY JS PIPE INDUSTRY INVESTMENT CO., LIMITED | Private company limited by shares | Live |
| Germany NiKe Pipe Industry Co., Limited | Private company limited by shares | Live |
| ZHONGYU PIPE INDUSTRY GROUP CO., LIMITED | Private company limited by shares | Live |
| Shanghai Lingyu Pipe Industry Co., Limited | Private company limited by shares | Live |
| SHANGHAI SHENGLIN PIPE INDUSTRY CO., LIMITED | Private company limited by shares | Dissolved |
| CHINA SHANGHAI CLEAN WATER PIPE INDUSTRY CO., LIMITED | Private company limited by shares | Live |
| USA JIANPAI PIPE INDUSTRY TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| 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 |