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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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Analysis of the difference between pickled coils and hot rolled coils-news-TIANJIN YUANTAI DERUN PIPE MANUFACTURING GROUP CO., LTD-
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Analysis of the difference between pickled coils and hot rolled coils
Analysis of the difference between pickled coils and hot rolled coils

1. Raw materials

The biggest difference between pickled coils and hot-rolled coils is the different raw materials. Pickled coils are products that remove surface oxide scale through pickling on the basis of hot-rolled coils. Hot-rolled coils are made of steel billets through preheating, rolling, and other processes.


Analysis of the difference between pickled coils and hot rolled coils.jpg


2. Production process

The production process of pickled coils is more complicated than that of hot-rolled coils, requiring multiple processes such as pickling, cold rolling, annealing, and pickling to ensure the quality of the steel plate surface. Hot-rolled coils only need to undergo basic processes such as preheating, rolling, and cooling.

3. Surface quality

Since pickled coils need to be pickled multiple times during the production process, their surface quality is smoother than that of hot-rolled coils, without defects such as oxide scale and carbon deposits. At the same time, during the production process of pickled coils, special treatments such as coating can also be performed on the surface to make it more corrosion-resistant and more beautiful.

4. Purpose

Due to the excellent surface quality of pickled coils, it can be used in situations that require high appearance quality, such as automobile manufacturing, home appliance manufacturing, architectural decoration, etc. When production costs are low, hot-rolled coils are usually used in some simpler structural components, such as steel pipes, shipbuilding, etc.