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| Development History |
| 1、We established our mill in 1993 with the name Cangzhou Spiral Steel Pipes Mill. |
| 2、In 1998,we build the first double face submerge arc welding unit, and start making pipe on September 18th,1999. |
| 3、In 2000,Cangzhou Spiral Steel Pipes Mill changed his name into Cangzhou Spiral Steel Pipe Co.,Ltd., reformed into joint-equity enterprise. |
| 4、In 2002,we built Φ219mm to Φ630mm double face submerge arc welding unit in workshop Ⅱ and start to making pipe. |
| 5、In July, 2002,We established Cangzhou Shenzhou Plastic Pipe Co.,Ltd. |
| 6、In 2004,Φ219mm to Φ529mm double face submerge arc welding unit start making pipe in workshop. |
| 7、In 2005, we took technical transformation on our high-frequency welding production line. |
| 8、In 2007,the thick wall thickness double face submerge arc welding unit go into operation. |
| 9、In 2009, our big diameter, thick wall thickness double face submerge arc welding unit go into operation in workshop Ⅲ, which can produce Φ509mm to Φ3500mm, wall thickness 25 mm steel pipes. |
| 10、In June, 2010,We established Cangzhou Derry Fengda International Trade Co., Ltd. |
| 11、At the end of Auguest,2010,the first production unit of Cangzhou Shuanglong Steel Pipe Co., Ltd. ,workshopⅠstart installation and run; and start making pipe from September. The second production line finished installation and run at the end of December. |
| 12、In October, 2010,We established Cangzhou Spiral Steel Pipe Co., Ltd Laiwu Branch. |
| 13、In December, 2010,the 3PE coating production line of Cangzhou OK Anticorrosion ＆ Thermal Insulation Project Co.,LTD go into production. |
| 14、In May, 2011,all the equipments in fly welding workshop of Cangzhou Double Dragon Steel Pipe Co., Ltd. started to installation and run. |
| 15、At the end of December, 2012, we joint capital to build Inner Mongolia Zhengyuan Steel Pipe Manufacturing Co., Ltd. |
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16. In June,2013, the Thermal Insulation equipment of Cangzhou OK Anticorrosion ＆ Thermal Insulation Project Co.,LTD go into production. |
| 17. In October, 2013, Cangzhou Spiral Steel Pipe Co., Ltd. is registered as Cangzhou Spiral Steel Pipes Group Co., Ltd which became a group ompany which has five subsidiaries. |
| 18.In April,2016, the painting plastic production line of Cangzhou OK Anticorrosion ＆ Thermal Insulation Project Co.,LTD go into production. |
| 19. In October,2018, the six production lines of Cangzhou Spiral Steel Pipes Group Co., Ltd branch start installation and go in to production in March, 2019. |