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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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How to control the quality of steel sheet pile construction-news-TIANJIN YUANTAI DERUN PIPE MANUFACTURING GROUP CO., LTD-
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How to control the quality of steel sheet pile construction
How to control the quality of steel sheet pile construction

Methods to control the construction quality of steel sheet piles: First, there is a certain sequence for inserting and driving steel sheet piles in rectangular cofferdams. It is generally recommended to start from the upstream corner and close up at the downstream. Inserting steel sheet piles in this order can, on the one hand, effectively prevent sedimentation within the cofferdam; on the other hand, it can cause the water flow to wash away a large amount of sediment, indirectly reducing the workload of sediment excavation; more importantly, The cofferdam can be effective and safe. If it is a circular steel sheet pile, the principle is the same, starting from the upstream, going around both sides, and ending at the downstream.

sheet piling retaining wall3.jpg

During the driving process of steel sheet piles, attention should be paid to controlling the verticality, because the vertical driving of steel sheet piles is the most critical factor in ensuring construction quality. Especially for the first steel sheet pile driven, to ensure its verticality, it is best to operate the steel sheet pile in two vertical directions at the same time to avoid the steel sheet pile from tilting. In addition, when the steel sheet pile cofferdam is closed, it is necessary to ensure that the locks on both sides are on the same straight line; therefore, it is recommended to close in advance when the remaining few steel sheet piles are not driven in. It is recommended to insert all the remaining steel sheet piles in sequence first, and then drive them one by one after adjusting them appropriately. If the remaining steel sheet pile cofferdam has not been closed using this method, you can also choose special-shaped steel sheet piles to fill the gap according to the actual conditions of the construction site.

When constructing steel sheet piles, it is often encountered that the cofferdam is narrow at the top and wide at the bottom. This situation will affect the insertion of other steel sheet piles. Therefore, the way to solve this kind of problem is to push the adjacent steel sheet piles from the upper end of the steel sheet piles and try to ensure that the widths of the steel sheet piles are about the same as each other.