At present, there are a total of 45 sets of continuous rolling mills that have been built or are under construction and put into operation in China. The ones under construction mainly include 1 set of Jiangsu Chengde Steel Pipe Co., Ltd., 1 set of Jiangsu Changbao Pleasant Steel Pipe Co., Ltd., and Henan Anyang Longteng Heat Treatment Materials. 1 set in Hebei Chengde Jianlong Special Steel Co., Ltd. and 1 set in Hebei Chengde Jianlong Special Steel Co., Ltd. The details of the construction of domestic continuous rolling mills are shown in Table 1. In addition, several companies are also planning to build new continuous rolling mills.
| Table 1 Current domestic construction of continuous rolling mills | |||||||
| Company Name | Crew Rules grid /mm | put into production years | Origin | Capacity / (10,000 t.a) ③ | Continuous rolling mill type | Product Specifications / mm | Roll change method |
| Baoshan Iron & Steel Co., Ltd. | Φ140 | 1985 | germany | 50/80 | 8 racks with two rollers + floating | Φ21.3~177.8 | Two-way side change |
| Tianjin Pipe Corporation Co., Ltd. | Φ250 | 1996 | Italy | 52/90 | 7 racks with two rollers + limiter | Φ114~273 | Two-way side change |
| Hengyang Valin Steel Tube Co., Ltd. | Φ89 | 1997 | germany | 30/30③ | 6 racks with two rollers + half float | Φ25~89(127) | One-way side change |
| Inner Mongolia BaoTou Steel Union Co.,Ltd. | Φ180 | 2000 | Italy | 20/35 | 5 racks with two rollers + limiter | Φ60~244.5 | |
| Tianjin Pipe Corporation Co., Ltd. | Φ168 | 2003 | Germany | 25/60 | VRS+5 rack three rollers + semi-floating | Φ 32~168 | Axial tunnel |
| Shuangan group Seamless Steel Pipe Co., Ltd | Φ159 | 2003 | Germany | 16/25 | 5 racks with two rollers + limiter | Φ73~159 | One-way side change |
| Hengyang Valin Steel Tube Co., Ltd. | Φ340 | 2004 | Italy | 50/70 | VRS+5 frame two rollers + stop | Φ133~340 | |
| Pangang Group Chengdu Steel&Vanadium Co.,Ltd. | Φ340② | 2005 | Italy | 50/80 | VRS+5 frame two rollers + stop | Φ139.7~365.1 | |
| Nantong Special Steel Co., Ltd. | Φ159 | 2005 | China | 10/10 | 8 racks with two rollers + limiter | Φ73~159 | |
| WSP Holdings Ltd. | Φ273② | 2006 | China | 35/50 | 5 racks with two rollers + limiter | Φ73~273 | |
| Tianjin Pipe Corporation Co., Ltd. | Φ460 | 2007 | Germany | 50/90 | 5 racks with three rollers + limiter | Φ219~460 | Axial tunnel |
| Pangang Group Chengdu Steel&Vanadium Co.,Ltd. | Φ177 | 2007 | Italy | 35/40 | VRS+5 frame three rollers + stop | Φ48.3~177.8 | |
| Tianjin Pipe Corporation Co., Ltd. | Φ258 | 2008 | Germany | 50/60 | 6 racks with three rollers + limiter | Φ114~245 | One-way side change |
| Shuangan group Seamless Steel Pipe Co., Ltd | Φ180 | 2008 | Germany | 25/30 | VRS+5 frame three-roller | Φ73~278 | |
| ANHUI TIANDA OIL PIPE COMPANY LIMITED | Φ273 | 2009 | Germany | 50/60 | 6 racks with three rollers + limiter | Φ114~340 | |
| SHANDONG MOLONG PETROLEUM CO., LTD. | Φ180 | 2010 | China | 40/35 | VRS+5 frame three rollers + stop | Φ60-180 | Axial tunnel |
| Liaoyang Ximulaisi Petroleum Special Pipe Manufacturing Co.,Ltd. | Φ114② | 2010 | China | 30/20 | 6 racks with two rollers + limiter | Φ60.3-140 | One-way side change |
| Yantai Lubao Steel Pipe Co., Ltd. | Φ460 | 2011 | Germany | 60/80 | 5 racks with three rollers + limiter | Φ244.5~460 | Axial tunnel |
| Heilongjiang Jianlong Iron and Steel Co., Ltd. | Φ180 | 2011 | Italy | 45/40 | 6 racks with three rollers + limiter | Φ60~180 | |
| JINGJIANG SPECIAL STEEL CO., LTD. | Φ258 | 2011 | germany | 50/60 | 6 racks with three rollers + limiter | Φ114~340 | One-way side change |
| Xinjiang Bazhou Seamless Oil Pipe Co.,Ltd. | Φ366② | 2011 | China | 40/40 | 6 racks with three rollers + limiter | Φ140-366 | |
| Inner Mongolia Baotou Steel Co., Ltd. Steel Pipe Company | Φ159 | 2011 | germany | 40/40 | 6 racks with three rollers + limiter | Φ38~ 168.3 | Axial tunnel |
| Φ460 | 2011 | germany | 60/80 | 5 racks with three rollers + limiter | Φ244.5~457 | ||
| Linzhou Fengbao Pipe Industry Co., Ltd. | Φ180 | 2011 | China | 40/35 | VRS+5 frame three-roller | Φ60~180 | |
| Jiangsu Tianhuai Pipe Co.,Ltd | Φ508 | 2012 | Germany | 50/80 | 5 racks with three rollers + limiter | Φ244.5~508 | |
| Jiangyin Huarun Steel Co.,Ltd. | Φ159 | 2012 | Italy | 40/40 | VRS+5 frame three-roller | Φ48~178 | |
| Hengyang Valin Steel Tube Co., Ltd. | Φ180 | 2012 | germany | 50/40 | 6 racks with three rollers + limiter | Φ114~180 | One-way side change |
| Jiangsu Chengde Steel Tube Share Co.,Ltd. | Φ76 | 2012 | China | 6 | 3 racks with three rollers + limiter | Φ42~76 | |
| Tianjin Master Seamless Steel Pipe Co.,Ltd. | Φ180② | 2013 | China | 35 | 6 racks with two rollers + limiter | Φ60.3~177.8 | |
| Linzhou Fengbao Pipe Industry Co., Ltd. | Φ89 | 2017 | China | 20 | 6 racks with three rollers + limiter | Φ32~89 | |
| Liaoning Tianfeng Special Tools Manufacturelimited Liability Company | Φ89 | 2017 | China | 8 | Short Process 4 Rack MPM | Φ38~89 | |
| Shandong Panjin Steel Tube Manufacturing Co., Ltd.(under Shandong Luli Group) | Φ180 | 2018 | China | 40×2 ④ | 6 racks with two rollers + limiter | Φ32~180 | |
| Φ273 | 2019 | China | 60×2 ④ | 5 racks with three rollers + limiter | Φ180~356 | ||
| Φ180 | 2019 | China | 50×2 ④ | 6 racks with three rollers + limiter | Φ60~180 | ||
| Linyi Jinzhengyang seamless steel tube co.,ltd. | Φ180 | 2018 | China | 40 | 6 racks with three rollers + limiter | Φ60~180 | Axial tunnel |
| Chongqing Iron&Steel(Group)Co.,Ltd. | Φ114 | 2019 | China | 15 | 6 racks with two rollers + limiter | Φ32~114.3 | One-way side change |
| Dalipal Holdings Limited | Φ159 | 2019 | China | 30 | 5 racks with three rollers + limiter | Φ73~159 | |
| Hengyang Valin Steel Tube Co., Ltd. | 89 | 2019 | China | 20 | 6 racks with three rollers + limiter | Φ48~114.3 | |
| Inner Mongolia Baotou Steel Co., Ltd. Steel Pipe Company | Φ100Retrofit | 2020 | China | 12 | 6 racks with three rollers + limiter | Φ25~89 | Axial tunnel |
| Jiangsu Chengde Steel Tube Share Co.,Ltd. | Φ127 | under construction | China | 20 | 5 racks with three rollers + limiter | Φ42~114.3 | One-way side change |
| Anyang Longteng Heat Treatment Material Co., Ltd. | Φ114 | under construction | China | 20 | 6 racks with three rollers + limiter | Φ32~114.3 | |
| Chengde Jianlong Special Steel Co., Ltd. | Φ258 | under construction | China | 50 | 6 racks with three rollers + limiter | Φ114~273 | |
| Jiangsu Changbao Pulaisen Steeltube Co., Ltd. | Φ159 | under construction | Germany | 30 | 6 racks with three rollers + limiter | Φ21~159 | One-way side change |
| Note: ① The Φ89 mm unit has been transformed from the original two-high continuous rolling to three-high continuous rolling; ②The unit has been shut down; ③Designed capacity / actual capacity; ④There are 2 sets respectively . | |||||||
The above content comes from the article “Prospects for the Future Development of Continuous Tube Rolling Technology”, which has been published in the first issue of “Steel Pipe” in 2021.