Product Details

Welded Steel Pipes EN 10219

1.Company Introduction

Jinan Xin Jiyuan Special Section Co.,LTD locates in Jinan where is the capital of Shan Dong province. Our company established in 1997. We have 16 years’ experience in producing square pipe and rectangular pipe. In order to expand our company, we invest RMB 16 million to build our new factory in 2011. Our production lines can manufacture all sizes of pipes according customers’ requirements.

2. Technical requirements:

1). Chemical Composition:

Yield Strength Grade	Demotic Raw-material Grade
235	Q235B, Q235C, Q235D, Q235qC, Q235qD
345	Q345A, Q345B,Q345C,Q345D,Q345Qc, Q345Qd, StE355, B480GNQR

Carbon Equivalent

Ceq(%)=C+Mn/6+Si/24 +Ni/40+Cr/5+Mo/4+V/14

Ⅰgrade product Ceq(%)

Yield Strength Grade	235	345	390
Ceq(%)	≤0.36	≤0.43	≤0.45
Note: In order to improve the performance of steel,390 could add the microelement such as V, Nb, Ti, Mo and N etc.

2). Mechanical Property:

Yield Strength Grade	W.T (mm)	Yield Strength (Mpa)	Tensile Strength (Mpa)	Elongation (%)	(20°C) Impact Value J
235	4~12>12~22	≥235	≥375	≥23	≥27
345	4~12>12~22	≥345	≥470	≥21	≥27
390	4~12>12~22	≥390	≥490	≥19	≥27

3). ⅠGrade Product Yield Strength:

Yield Strength Grade	Outside perimeter (mm)	Wall Thickness (mm)	Yield Strength %
			Directly to Square	Round to Square
235	≥800	12~22	≤80	≤90
345
390			≤85	≤90
Note: when the outer perimeter less than 800mm,can be determined by supply and buyer

3. Manufacturing Process:

1).Directly into Square: make continuous angle deformation of cold-rolled or hot-rolled steel plate directly, and then by high frequency welding form a rectangular steel tube forming method. Also known as square-square method.

2). Round to square: make continuous angle deformation of cold-rolled or hot-rolled steel plate directly, and then by high frequency welding form a round steel tube forming method, though the reshaping finally form a rectangular steel tube forming method. Also known as round to square method.

4.Why choose our company?

1.High quality pipe with reasonable price.

2.Advanced test equipments and professional inspection measures to guarantee our quality.

3.Our products are widely used in construction, water supply and other fields.

4.The after-sale service is good, customers can buy our products without any worries.

5.We can produce different kinds of pipes according to customers’ requirements.

6.We have exported our products to many foreign countries. Our products are popular among these countries.

7.Professional staff can save your time and money

If you are interested in our products, you can contact me. I will try my best to help you find products that you want.

Company Name	Jinan Xin Jiyuan Special Section Tube Co., LTD
Address	Dawei Industrial Park, Tianqiao District, Ji'nan, Shandong, China (Mainland)
Telephone	86-531-85736315
Fax	86-531-85736325
Website	http://jnxinjiyuan.en.china.cn/

7.Inspection

8.Certification

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