- Tianjin Tiangang Special Petroleum Pipe Manufacture Co., Ltd.
- Oil Pipe, Casing Pipe, API Pipe, OCTG, Steel Pipe, Tubing Pipe, Coupling, Casing, Drill Pipe, Threaded Pipe
Tianjin
- SHANDONG HAOHAN STEEL INDUSTRY CO., LTD.
- Steel
Shandong
- Jiangsu Yihao Fluorine Plastic Manufacturing Co., Ltd.
- PTFE Tube, PTFE Po PFA Lined Lining Tube, PTFE Po PFA Lined Lining Tower Storage
Jiangsu
- Shandong Donghong Pipe Industry Co., Ltd.
- Steel wire reinforced PE composite pipe, HDPE pipe, PE pipe, steel pipe
Shandong
- Wuxi Jinsuyuan Metal Products Co., Ltd.
- Aluminum sheet
Jiangsu
- Zhejiang Hang Heavy Technology Co., Ltd.
- Various steel pipes, steel tubes, such as ERW steel pipe, LSAW steel pipe, SSAW steel pipe, steel hollow section etc.
Zhejiang