- Sichuan Soolink (Heat Shrink) Group
- Main business:
- Caribbean RegionBermuda
- Shandong Liaocheng Youyi Steel Pipe Co.,Ltd.
- Main business:
- Caribbean RegionBermuda
- Wenzhou Longwan Nan Yang Steel Pipes Factory
- Main business:
- Caribbean RegionBermuda
- Jiangsu Huawei Steel Co.,LTD.
- Main business:
- Caribbean RegionBermuda
- Yantai Qingzhou Steel Pipe Co.,Ltd.
- Main business:
- Caribbean RegionBermuda
- Zhangjiagang Huadian Im&Ex Co.,Ltd
- Main business:
- Caribbean RegionBermuda
- Hebei Smart Steel Pipe Manufactur Co.
- Main business:
- Caribbean RegionBermuda
- Xinxiang Huadong screen manufacture CO.,Ltd
- Main business:
- Caribbean RegionBermuda
- Cangzhou Galaxy Steel Pipe Co., Ltd
- Main business:
- Caribbean RegionBermuda
- Sumitomo metal steel pipe LTD
- Main business:
- Caribbean RegionBermuda
- China Jiangsu International Economic-Technical Cooperation Corporation
- Main business:
- Caribbean RegionBermuda
- Wuxi advanced titanium technology Co., Ltd.
- Main business:
- Caribbean RegionBermuda
- Huajin steel group
- Main business:
- Caribbean RegionBermuda
- Yongjia Yuanheng Machine Co., Ltd.
- Main business:
- Caribbean RegionBermuda
- Haiyan Jia Wei Metal Products Co., Ltd.
- Main business:
- Caribbean RegionBermuda
- Tianjin Shining Steel Pipe Co.,Ltd
- Main business:
- Caribbean RegionBermuda
- Hebei Hengda Sealing Materials Co., Ltd.
- Main business:
- Caribbean RegionBermuda
- cang zhou yahaijintong co.,ltd
- Main business:
- Caribbean RegionBermuda
- Kingwell Oilfield Machinery CO.,LTD
- Main business:
- Caribbean RegionBermuda
- Shanghai Jiuxie Machinery Co., Ltd.
- Main business:
- Caribbean RegionBermuda