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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 store galvanized steel pipe for greenhouse?-news-TIANJIN YUANTAI DERUN PIPE MANUFACTURING GROUP CO., LTD-
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How to store galvanized steel pipe for greenhouse?
How to store galvanized steel pipe for greenhouse?

As a pillar-like existence in the greenhouse, the square tube can be said to be indispensable. Compared with round tubes and oval tubes, square tubes are easier to cut and weld, and can easily handle most hoop accessories.

In actual use, the common dimensions of galvanized steel pipe for greenhouse are as follows:

30*50/40*60/50*70/80*80/100*100/120*120 (units are MM)

Square tubes are often used as main columns in greenhouse construction, large greenhouse cross braces and diagonal braces, and door welding. Usually the thickness of the square tubes used in construction is above 1.5, and it is better to use hot-dip galvanized tubes.

galvanized steel pipe for greenhouse.jpg

The galvanized steel pipe for greenhouse should not be exposed to rain for a long time during storage.

1. If the square tube needs to be stored for a long time, it should be protected with an opaque cover from the beginning of storage to avoid corrosion, aging of the anti-corrosion layer, and warping of the square tube.

2. The cover should be strong and durable to prevent rot and leakage due to prolonged exposure to the sun and rain.

3. When the square tube is covered, the surface of the steel tube should be ventilated to avoid water vapor that is difficult to volatilize and collect on the surface.

4. The square tube should be supported when it is stored, and it should be kept at a certain distance from the ground to ensure the ventilation of the galvanized steel pipe for greenhouse.

5. After the square pipes are stacked and stored, the pipe end protector should be removed to prevent moisture from gathering on the contact surface between the pipe end protector and the steel pipe and making it difficult to volatilize.

6. When storing square pipes, attention should be paid to the number of layers of steel pipes stacked to avoid local stress on the pipe ends caused by too many layers, which will cause radial plastic deformation of the steel pipes and damage to the anti-corrosion layer.

7. Avoid contact with polluting oil, copper, etc. during storage.