Shanghai zhoufu water purification pipeline co., ltd
Shanghai Machoke Tu Su Steel Pipe Co., Ltd.
Shanghai You Li Ji Water Pipe Industry Co., Ltd.
Jiangsu Shunlong Pipeline Technology Co., Ltd.
Jiangsu Zhongxin Green Pipeline Technology Co., Ltd.
Jiangsu wangda antisepsis pipeline equipment co., ltd
Changzhou Li Teng Stainless Steel Composite Pipe Co., Ltd.
Nantong Sanda antisepsis engineering co., ltd
Suzhou seamless steel pipe factory
Beijing Chuangjian Pipeline Co., Ltd. Jiangshen Palace
Beijing xingtaide pipeline equipment co., ltd
Beijing Gong Yu Metal Composite Pipeline Co., Ltd.
Beijing lepu co., ltd
Beijing Shuanglong Zhongxin Pipeline Industry Co., Ltd.
Zhejiang Jiaxing Zhong Da Group Co., Ltd.
* Zhejiang Yingtian bimetallic pipe technology Co., Ltd.
Zhuji lingguang pipeline industry manufactory
Shangyu Lv Qing stainless steel composite pipe factory
Shaoxing shuilian pipeline industry co., ltd
* Shenyang Bao Tong Pipe Industry Co., Ltd.
Benxi Tianhe steel-plastic composite pipeline industry co., ltd
Tianjin Wang Cheng metal composite pipeline industry Co., Ltd.
Tianjin Cecilia Yip antisepsis technology development co., ltd
Shandong Baode Metal Composite Board Co., Ltd.
Qingdao paibiao pipeline industry co., ltd
"All technology co., LTD
Guangzhou Zuo Li Pipeline Equipment Co., Ltd.
Guangzhou Haizhu district Zhujiang galvanized steel pipe factory
Xi an Xiangyang aerospace material co., ltd
Wuhu Jinshi stainless steel composite pipe manufacturing co., ltd
Beijing haoyu industry & trade co., ltd. new material institute
Hefei Bao Zhong machinofacture co., ltd
Shanghai Texaco water purification pipeline manufacturing co., ltd.
Laiyang changhong industry & trade co., ltd
Changshu shajiabang pipeline industry co., ltd
Suzhou new area Tiandi composite pipeline factory
Guangdong huajie steel pipe industry co., ltd
Beijing yihaisheng tubing co., ltd
Chongqing Long Jun pipeline industry co., ltd
* Hangzhou Seiko Stainless Steel Co., Ltd.
Shaanxi taifengqiao metal products co., ltd.
It is compounded by cold rolling process.
The rest are compounded by cold drawing process.