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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 are the differences between straight seam steel pipe and high frequency straight seam steel pipe?-news-TIANJIN YUANTAI DERUN PIPE MANUFACTURING GROUP CO., LTD-
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What are the differences between straight seam steel pipe and high frequency straight seam steel pipe?
What are the differences between straight seam steel pipe and high frequency straight seam steel pipe?

Straight seam steel pipe refers to a welded steel pipe with only one weld in the longitudinal direction of the pipe body. GB/9711.1 stipulates that when the diameter is greater than 914.4, straight seam steel pipes can have two straight welds, and the angle between the welds is 180 degrees. The quality requirements of the weld seam are consistent with the technical parameters of the straight seam steel pipe for the same weld seam.


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According to the production process, it is divided into ERW high-frequency straight seam steel pipe, JCOE straight seam steel pipe, and rolled straight seam steel pipe.

Straight seam steel pipe is a general term for high-frequency straight seam, submerged arc straight seam, electric welding straight seam, pipeline straight seam, and other production process products.

The high-frequency straight seam steel pipe adopts the skin effect of high-frequency current to generate high temperature at both ends of the steel plate in a short period of time and then extruded and fused together by an external force, which is the real base metal butt joint without welding rod. ERW high-frequency straight seam steel pipe uses hot-rolled coil as raw material, and the uniform wall thickness can be controlled at about ±0.2mm. Delivery and other advantages. In recent years, various natural gas pipeline network projects and gas companies have widely used ERW steel pipes as the main steel pipes of urban pipeline networks. At present, ERW high-frequency straight seam steel pipe accounts for 60% of the world's steel pipe usage ratio.

Straight seam steel pipe often refers to the double-sided submerged arc straight seam steel pipe produced by JCOE. It adopts the JCOE cold forming process, uses welding wire for the weld seam, and uses particle flux to submerge the arc at the same time, so it is named submerged arc straight seam steel pipe. Submerged arc welded straight seam steel pipe is mainly flexible in the production process, and can produce any specification and wall thickness between 325 mm-1420 mm. It greatly satisfies the use of steel pipe size standards in various countries in the world, and high-frequency straight seam steel pipes are usually produced in commonly used specifications.

The high-frequency straight seam steel pipe is usually called the original pipe, and the industry distinguishes it from the name of the submerged arc welded straight seam steel pipe or the heat-expanded high-frequency straight seam steel pipe.