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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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steel strand-Other Products-TIANJIN YUANTAI DERUN PIPE MANUFACTURING GROUP CO., LTD-
Other Products

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steel strand
steel strand
steel strand
steel strand
steel strand

The PC steel bar is mainly used for the building industry, it is the main steel material in the pipe pile foundations, has high strength, low usage of metallic material, and convenience usage, and quality was easily promised. It has an extensive usage building industry.

The PC steel bar is mainly used for the building industry, it is the main steel material in the pipe pile foundations, has high strength, low usage of metallic material, and convenience usage, and quality was easily promised. It has an extensive usage building industry.

Designation

Diameter 7.1mm

Diameter 9.0mm

Diameter 10.7mm

Diameter 12.6mm

Grade

Grade D - Class 1

Grade D - Class 1

Grade D - Class 1

Grade D - Class 1

Symbol

SBPDL 1275/1420

SBPDL 1275/1420

SBPDL 1275/1420

SBPDL 1275/1420

Nominal cross-section area (mm²)

40.0

64.0

90.0

125.0

Diameter Tolerance

0.00mm/±0.2mm

0.00mm/±0.2mm

0.00mm/±0.2mm

0.00mm/±0.2mm

Yield stress (N/mm²)

1275 Min

1275 Min

1275 Min

1275 Min

Tensile stress (N/mm²)

1420 Min

1420 Min

1420 Min

1420 Min

Elongation (%)

5 Min

5 Min

5 Min

5 Min

Relaxation (%)

2.5 Max

2.5 Max

2.5 Max

2.5 Max

Groove number

6

6

6

6

Groove direction

S

S

S

S

Nominal weight (kg/m)

0.295-0.333 kg/m

0.482-0.522kg/m

0.679-0.723kg/m

0.979-0.989kg/m



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Specification

Steel Grade

30MnSi

Coil outside diameter (mm)

2300 max

The coil inside diameter (mm)

1800 min

Coil weight

600-1300 kgs

Packing

In coils, all coils are wrapped with anti-rust plastic &P.P woven sheet

Applicant

Used to make steel piling



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Production Process

(1) pc bar Raw material for steel wire products is supplied by steel mills. Steel mills make wire rods by hot rolling process from billet. 

(2) Surface treatment Descaling wire rods remove rust and scales on the surface of the wire. Surface coating wire rod facilitates drawing. 

(3) First Drawing Descaled and surface-coated wire rod is brought to 1st drawing machine to draw to the required diameter and to give mechanical properties suitable for the application. 

(4) Stranding Positioning the wires within the strands. 

(5) Stabilizing Heat treatment process using high frequency relieves and removes stress.