- Langfang Baiwei Drill Co.,Ltd
- Main business:
- Caribbean RegionBermuda
- Wuxi Xintong Steel Pipe Co.,Ltd
- Main business:
- Caribbean RegionBermuda
- Hebei Zhonghai Steel Pipe Manufacture Co., Ltd.
- Main business:
- Caribbean RegionBermuda
- Cangzhou City Yongzheng Pipe Industry Co., Ltd
- Main business:
- Caribbean RegionBermuda
- TONGXIANG WUYANG METALS CO.,LTD
- Main business:
- Caribbean RegionBermuda
- Changzhou Huayang steel Co., Ltd.
- Main business:
- Caribbean RegionBermuda
- Luoyang Dingding Tungsten & Molybdenum Material Co., Ltd.
- Main business:
- Caribbean RegionBermuda
- K&M Limited
- Main business:
- Caribbean RegionBermuda
- Tianjin Okyou International trade Co.,Ltd
- Main business:
- Caribbean RegionBermuda
- Hangzhou Eastern-Europe Iron & Steel Co.,Ltd.
- Main business:
- Caribbean RegionBermuda
- Shinestar Group-Threeway Steel Co.,Ltd.
- Main business:
- Caribbean RegionBermuda
- Hebei Pengxin Pipeline Group Co.,Ltd
- Main business:
- Caribbean RegionBermuda
- Zhejiang Yinlai Steel Tube CO.,LTD.
- Main business:
- Caribbean RegionBermuda
- Jiangsu Yongyao Steel Co., Ltd
- Main business:
- Caribbean RegionBermuda
- Liaocheng City Xinglong Seamless Tube Manufacturing Co.,Ltd
- Main business:
- Caribbean RegionBermuda
- Wenzhou Bosheng Pipe Manufacturing Co.,Ltd
- Main business:
- Caribbean RegionBermuda
- Hebei Smart Steelpipe Mill Co.,Ltd.
- Main business:
- Caribbean RegionBermuda
- Bohai Heavy Industrial Pipeline CO.,LTD
- Main business:
- Caribbean RegionBermuda
- Zhejiang Hongkang Stainless Steel Co.,Ltd.
- Main business:
- Caribbean RegionBermuda
- Tianjin Yuxianglong Iron&Steel Co.,Ltd
- Main business:
- Caribbean RegionBermuda