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Tianjin Yuantai Derun Pipe Manufacturing Group Co., Ltd., established in March 2002, is the biggest manufacturer specializing in  ERW square&rectangular tube/pipe, hollow section structure pipe, galvanized pipe and spiral welding pipe in China. Annual output reaches 5 million tons.Yuantai Derun has 59 production lines of black ERW pipe, 10 production lines of galvanized pipe and 3 production lines of spiral welding pipe. Square pipe from 20*20*1mm to 500*500*40mm, rectangular pipe from 20*30*1.2mm to 400*600*40mm,  welded pipe from 2”—60” can be manufactured. Yuantai Derun can manufacture square rectangular pipes as per the standards of ASTM A500, JIS G3466, EN10219, DIN2240, BS1387, AS1163.

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January 1993

Key team members of Yuantai Derun group began technical job in Tianjin Daqiuzhuang tube factory.

June 2002

Tianjin Yuantai Industry & Trade Co., Ltd. was founded, specialize in square, rectangular hollow steel pipe, hot galvanized welded (hot dip galvanized) square tube, the registered capital is USD 10 million.

May 2004

One of Yuantai subsidiaries Tangshan Lituo Steel Tube Co., Ltd. was established, specialize in square rectangular straight welded hollow steel pipe, registered capital is USD 10 million.

April 2005

Yuantai Steel Square Pipe Co. Ltd. was established, specialize in square welding hollow steel tube and galvanized tube, the registered is USD 2 million.

March 2010

Tianjin Yuantai Runxiang commercial trade company was established, specialize in strip steel trade, galvanized pipe agent, etc., the registered capital is USD 2 million.

March 2010

Tianjin Yuantai Derun pipe manufacturing group Co. Ltd. was formally established, marking that the production of high-frequency welded black, galvanized square pipe, spiral welded pipe, pipe logistics and pipe trade as one of the large-scale joint enterprise Yuantai Derun group was formally established, the group registered capital is USD 20 million.

March 2010

Tianjin Yuantai Derun Investment Co., Ltd. was formally established, specialize in steel pipe industry chain,lower industry mergers and acquisitions and industrial real estate development, the registered capital is USD 2 million.

August 2013

Tianjin Derun Runfeng pipe manufacturing Co. Ltd was established, specialize in hot galvanized (hot galvanizing) processing business, the registered capital is USD 8 million.

March 2015

Tianjin Yuantai Yuanda anti-corrosion insulation pipe Co., Ltd. was established, specialize in spiral welded pipe production and sales, the registered capital is USD 2 million.

August 2015

Tangshan Yuantai Derun Pipe Co., Ltd. was established, specialize in steel strip, steel pipe trade, registered capital is USD 1 million.

March 2016

Tianjin Yuantai Derun International Trade Co., Ltd was established,mainly engaged in international import and export business for Yuantai Group, registered capital is USD 2 million.

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What is cold rolled steel made of?-news-TIANJIN YUANTAI DERUN PIPE MANUFACTURING GROUP CO., LTD-
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What is cold rolled steel made of?
What is cold rolled steel made of?

Cold-rolled steel is a type of steel that is processed at room temperature, using a series of rolling processes to achieve the desired thickness, flatness, and surface finish. Unlike hot-rolled steel, which is produced at high temperatures, cold-rolled steel is rolled at or near room temperature, which makes it stronger, more durable, and less likely to warp or bend.


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Cold-rolled steel is made from hot-rolled steel, which is produced by heating a large slab of steel to high temperatures and then passing it through a series of rolling mills to reduce its thickness and shape it into the desired form. The resulting hot-rolled steel has a rough, uneven surface and can be prone to warping and bending due to residual stresses in the material.

To produce cold rolled steel, the hot rolled steel is first pickled to remove any scale or oxide buildup on the surface. Pickling involves immersing the steel in a bath of acid or other chemical solution, which removes the surface layer of impurities and creates a clean, smooth surface.

Once the steel has been pickled, it is then cold rolled through a series of rolling mills, which gradually reduce its thickness and shape it into the desired form. The rolling process is done at or near room temperature, which results in a more uniform, consistent thickness, and a smoother, more even surface finish.

Cold-rolled steel can be further processed and finished in a variety of ways, depending on its intended use. It can be annealed, which involves heating the steel to a high temperature and then allowing it to cool slowly, to improve its ductility and toughness. It can also be galvanized, and coated with a layer of zinc to protect it from rust and corrosion.

Cold-rolled steel is used in a wide range of applications, from automotive and aerospace parts to construction materials and consumer products. Its strength, durability, and versatility make it a popular choice for many different types of manufacturing and fabrication processes.