Yangzhou Chengde steel tube co., Ltd.--the predecessor of Jiangsu Chengde steel tube co., Ltd. State sophomore enterprise, provincial private science and technology enterprise, mainly production 22-720x3-100mm all kinds of carbon steel, alloy steel seamless steel pipe, covering power, boiler, oil, chemical, coal, Many industries, such as shipbuilding, is the most complete variety of seamless steel pipe technology private enterprise.

July 2006, Jiangsu Chengde steel tube company Division of large-diameter steel pipe manufacturing business and new Yangzhou Chengde steel tube co., Ltd., in October 2006, receiving business license. in Yangzhou Chengde steel tube co., Ltd. is a large steel pipe manufacturing enterprises, with registered capital of 160 million Yuan, mainly the production of diameter 219 mm large diameter high pressure boiler tubes, oil and petrochemical tubes, shipping tubes, high pressure pipe for chemical fertilizer, oil surface casing and other high-end steel pipe products.

currently, Yangzhou Chengde steel tube co., Ltd. 's high-end large-diameter seamless steel tube has entered a period of rapid growth, the company is considering a greater development and prospects for the future.

since 2006, companies continue to consolidate in the large-diameter seamless steel pipe industry leader through innovation, expanding the scale of production and operation. the company large-diameter seamless steel tube production exceeding 200,000 tonnes in 2010 , sales income of 5 billion yuan, profits and taxes exceeding 1 billion yuan.

in October 2006, Jiangsu Chengde steel pipe co., Ltd. viability separation of large-diameter steel pipe business, and new Yangzhou Chengde steel tube co., Ltd., registered capital is 20 million Yuan.

in December 2006, Yangzhou Chengde steel tube co., Ltd. capital increase to 140 million Yuan, registered capital of 160 million Yuan.

in February 2007, the United States subsidiary of the Carlyle Group

Carlyle Marco Polo Steel Tube Co., Ltd Zhang Huaide has purchased on behalf of Yangzhou Chengde steel tube co., Ltd. 49% shares, the company became the joint-venture enterprises

in January 2009, with a total investment of 1.5 billion yuan the second phase project of the company operation, main ф 600, ф 700, ф 800 slab in continuous casting, forging, electro-slag remelting stock production of large-diameter thin-wall high precision steel tubes for boiler, CNG cylinder air cylinder tube, tube, wind turbine bearing oxygen tube, undersea pipelines with pipe . the further refinement of this project, will make it the world's largest low-cost production line for large diameter seamless pipe;