Hollow Section Steel Tubes(Hot Rolled/Cold Rolled)

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China Main Port
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TT or L/C
Min Order Qty:
50MT m.t.
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based on order m.t./month
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Hollow Section Steel TubesHot Rolled/Cold Rolled

Application of Hollow Section Steel TubesHot Rolled/Cold Rolled

It is widely used in building, machine, chemical equipment, automobile industrial, container, it is also applied to agriculture and mine machine.

ASTM A500, GB6728

Steel grade of Hollow Section Steel TubesHot Rolled/Cold Rolled

ASTM A500: A, B, C

GB6728Q195Q215Q235Q345

Size of Hollow Section Steel TubesHot Rolled/Cold Rolled

 *Remark: Besides below sizes, we also can arrange production based on requirement of customers

Sizee(mm)

Thickness(mm)

20×10

0.6-1.0

25×12

0.6-1.0

38×19

0.6-1.5

50×25

0.6-1.5

50×30

1.6-3.0

60×40

1.5-3.5

75×50

1.5-4.0

80×40

1.5-4.0

100×50

2.0-6.0

100×60

2.0-6.0

100×75

2.0-6.0

120×60

3.0-6.0

120×80

3.0-6.0

125×50

3.0-6.0

125×75

3.0-6.0

150×50

3.0-6.0

150×75

3.0-6.0

150×100

4.0-12

160×80

4.0-6.0

175×100

4.0-12

200×100

4.0-12

200×150

4.0-12

250×150

5.0-12

300×200

5.0-12

400×200

5.0-12

Chemical Composition(%)

Chemical Requirement

 

Composition %

Grade A

Grade B

Heat

Product

Heat

Product

Element

analysis

analysis

analysis

analysis

Carbon max

0.26

0.3

0.22

0.26

Manganese max

1.4

1.45

Phosphorus, max

0.035

0.045

0.03

0.04

Sulfur max

0.035

0.045

0.02

0.03

Copper, when copper steel is specified, min

0.20

0.18

0.2

0.18

Where an ellipsis (...)appears in this table, there is no requirement

For each reduction of 0.01 percentage point below the specified maximum for carton, and increase of 0.06 percentage point above the specified maximum for manganese is permitted, up to a maximum of 1.50% by heat analysis and 1.6% by product analysis

Mechanical Properties

Tensile Requirement

 

Grade A

Grade B

Tensile strength, min, psi (Mpa)

48000 (400)

70000 (483)

Yield strength, min, psi (Mpa)

36000 (250)

50000 (345)

Elongation in 2 in. (50.8mm), min, %

23

23

Hollow Section Steel Tubes(Hot Rolled/Cold Rolled)

Hollow Section Steel Tubes(Hot Rolled/Cold Rolled)

 

 

 

 

 

Q:
There are several advantages of using steel pipes in the manufacturing of furniture. Firstly, steel pipes offer exceptional strength and durability, ensuring that the furniture will be long-lasting and capable of withstanding heavy use. Secondly, steel pipes are highly resistant to corrosion, making them suitable for both indoor and outdoor furniture. Additionally, steel pipes provide a sleek and modern aesthetic, adding a touch of sophistication to the furniture design. Lastly, steel pipes are relatively lightweight compared to other materials like wood or concrete, making transportation and installation easier. Overall, using steel pipes in furniture manufacturing offers a combination of strength, durability, aesthetic appeal, and practicality.
Q:
Yes, steel pipes can be used for sewage and wastewater systems. Steel pipes are highly durable, resistant to corrosion, and can withstand high pressure and temperature conditions, making them suitable for transporting sewage and wastewater efficiently and securely. Additionally, steel pipes have a long lifespan and can handle the abrasive nature of sewage and wastewater, making them a reliable choice for such systems.
Q:
There are several types of steel pipe connections used in fire sprinkler systems including threaded connections, grooved connections, flanged connections, and welded connections.
Q:
Steel pipes resist corrosion through a process called passivation, wherein a protective layer of oxide forms on the surface of the steel, preventing further oxidation and corrosion. Additionally, the pipes can be coated with anti-corrosive materials or undergo treatments such as galvanization or lining to enhance their resistance against corrosion.
Q:
There are several types of valves used with steel pipes, including ball valves, gate valves, globe valves, check valves, and butterfly valves.
Q:
Steel pipes are commonly used in sewage systems for their strength, durability, and resistance to corrosion. These pipes are used to transport sewage and wastewater from homes, businesses, and industrial facilities to treatment plants or disposal sites. They are ideal for underground installations due to their ability to withstand high pressure and the weight of the surrounding soil. Additionally, steel pipes can be welded together, providing a seamless and leak-proof system that ensures the safe and efficient transportation of sewage.
Q:
To calculate the pipe friction loss for steel pipes, you need to use the Darcy-Weisbach equation. This equation is commonly used in fluid dynamics to determine the pressure drop or friction loss due to the flow of fluid through a pipe. The equation is as follows: ΔP = (f * L * ρ * V²) / (2 * D) Where: ΔP = Pressure drop or friction loss f = Darcy friction factor L = Length of the pipe ρ = Density of the fluid V = Velocity of the fluid D = Diameter of the pipe The Darcy friction factor (f) is a dimensionless value that depends on the Reynolds number (Re) and the relative roughness (ε/D) of the pipe, where ε is the absolute roughness of the pipe. To determine the friction factor, you can use various correlations or Moody's diagram. Once you have the friction factor, you can plug in the values for length, density, velocity, and diameter into the equation to calculate the pressure drop or friction loss. It is important to note that the units of all the variables should be consistent (e.g., length in meters, density in kg/m³, velocity in m/s, diameter in meters) to obtain accurate results. By using this equation and obtaining the necessary parameters, you can calculate the pipe friction loss for steel pipes, which is crucial in designing and analyzing fluid flow systems.
Q:
Yes, steel pipes can be used for oil refineries. Steel pipes are commonly used in oil refineries due to their durability, high strength, and resistance to corrosion, making them suitable for transporting crude oil and refined products under high pressure and harsh conditions.
Q:
Steel pipes are used in the construction of skyscrapers primarily for their strength and durability. These pipes provide structural support and serve as columns, beams, and foundations, helping to distribute the weight and withstand the immense forces exerted on tall buildings. Additionally, steel pipes are used for plumbing and HVAC systems, allowing for efficient water supply, drainage, and climate control throughout the skyscraper.
Q:
Yes, steel pipes can be used for steam systems. Steel pipes are commonly used in steam systems due to their high strength, durability, and heat resistance properties. Additionally, steel pipes can withstand high pressures and temperatures, making them suitable for transporting steam safely and efficiently.
We mainly produces Square and Rectangular Tubes which using the cold rolling technology and other types of tube including Round Steel Pipes, Welded Steel Pipes, Seamless Steel Pipes, Long Products, Flat Steel Products and so on. Our productivity achieves 500, 000 tons each year. Our company is stronger in financial capital and enough power of technical support. The steel tubes made by the company are strictly according to ISO9001:2000 standard quality management system to ensure the high quality of the products.

1. Manufacturer Overview

Location Tianjin,China
Year Established 2000
Annual Output Value Above Thirty Million RMB
Main Markets China; Europe
Company Certifications ISO9001:2000

2. Manufacturer Certificates

a) Certification Name  
Range  
Reference  
Validity Period  

3. Manufacturer Capability

a)Trade Capacity  
Nearest Port Tianjin;Qingdao
Export Percentage 41% - 50%
No.of Employees in Trade Department
Language Spoken: English;Chinese
b)Factory Information  
Factory Size: 53000square meter
No. of Production Lines
Contract Manufacturing OEM Service Offered;Design Service Offered
Product Price Range Low Average

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