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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 is the difference between galvanized pipe and galvanized strip pipe reflected?-news-TIANJIN YUANTAI DERUN PIPE MANUFACTURING GROUP CO., LTD-
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How is the difference between galvanized pipe and galvanized strip pipe reflected?
How is the difference between galvanized pipe and galvanized strip pipe reflected?

1. Galvanized pipe structure: Galvanized pipe has adjusted the production process of hot-dip galvanized pipe. First pickle the strip steel used for pipe making, in order to remove the iron oxide on the surface of the strip steel, after pickling, wash it in an aqueous solution of ammonium chloride or zinc chloride or a mixed aqueous solution of ammonium chloride and zinc chloride, and then into the hot-dip coating tank. It is then air-dried and made into tubes. The coating is uniform and bright, and the amount of galvanizing is very small, which is lower than the cost of producing hot-dip galvanized pipes. Its corrosion resistance is slightly worse than that of hot-dip galvanized pipe!


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2. Hot-dip galvanized pipe structure: hot-dip galvanized pipe is to make the molten metal react with the iron substrate to produce an alloy layer so that the substrate and the coating are combined. First pickle the steel pipe, in order to remove the iron oxide on the surface of the steel pipe, after pickling, wash it in the ammonium chloride or zinc chloride aqueous solution or the mixed aqueous solution tank of ammonium chloride and zinc chloride, and then send it to the hot dip coating tank middle. Hot-dip galvanizing has the advantages of uniform coating, strong adhesion, and long service life. The hot-dip galvanized steel pipe substrate undergoes complex physical and chemical reactions with the molten plating solution to form a corrosion-resistant zinc-iron alloy layer with a tight structure. The alloy layer is integrated with the pure zinc layer and the steel pipe substrate. Therefore, it has strong corrosion resistance.

3. The difference between galvanized strip pipe and hot-dip galvanized pipe:

Galvanized belt pipe:

(1) The color of the galvanized pipe is a bit blue, and the weight is 6 meters long and 5.5 kg (the corrosion resistance is stronger and the service life is shorter than that of hot-dip galvanized steel pipe, and the price is low and economical).

(2) The galvanized strip pipe is shiny white and reflective, with few snowflakes, and the two ports are clean and free of zinc warts.

Hot-dip galvanized pipe:

(1) The color of the hot-dip galvanized pipe is a bit whitish, and the weight: is 6 meters long and 6.5 kg (strong corrosion resistance, long service life, slightly higher price).

(2) The hot-dip galvanized pipe is snow-white but not shiny or reflective. There are many snowflakes on the surface, and there are zinc nodules (coagulated zinc) at both ends.