Hollow Section-Rectangle Tubes

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Loading Port:: Tianjin

Payment Terms:: TT or L/C

Min Order Qty:: 50MT m.t.

Supply Capability:: based on order m.t./month

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Application

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

Standard：

ASTM A500, GB6728

Steel grade:

ASTM A500: A, B, C

GB6728：Q195，Q215，Q235，Q345

Size of Pipe:

*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

Standard: ASTM A500

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
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

GB6728：

Steel Grade

CHEMICAL COMPOSITION

MECHANICAL PROPERTIES

C (%)

Si (%)

(%)

P(%)

Max

S (%)

Max

YS(Mpa)

Min

TS(Mpa)

Min

El (%)

Min

Q195

0.06-0.012

0.3

0.25-0.5

0.45

0.5

195

315

Q215

0.09-0.15

0.3

0.25-0.55

0.45

0.5

215

335

Q235

0.12-0.22

0.3

0.3-0.7

0.45

235

375

Q345

0.20

0.55

1.0-1.6

0.45

345

510

producing of Hollow Section-Rectangle Tubes

Chinese Hollow Section-Rectangle Tubes/Hiquality Hollow Section-Rectangle Tubes

delivery of Hollow Section-Rectangle Tubes

manufacturer of Section-Rectangle Tubes

Q: How are steel pipes used in the construction of wastewater treatment plants?: Steel pipes are used extensively in the construction of wastewater treatment plants for various purposes. They are used for the transportation of wastewater from one unit to another, as well as for the distribution of treated water to different areas. Steel pipes are also used in the construction of the main water supply and drainage systems within the plants. Additionally, they are utilized for the installation of pumps, valves, and other equipment required for the treatment process. The durability and strength of steel pipes make them an ideal choice for the demanding and corrosive environment of wastewater treatment plants.

Q: Can steel pipes be used for transporting liquids?: Yes, steel pipes can be used for transporting liquids. Steel pipes have excellent durability, strength, and corrosion resistance, making them a suitable choice for transporting various liquids, including water, oil, gas, and chemicals.

Q: What is the maximum length of steel pipes available?: The maximum length of steel pipes available can vary depending on the manufacturer and specific application. However, steel pipes can typically be found in lengths ranging from 20 feet (6 meters) to 40 feet (12 meters) or even longer in some cases.

Q: How are steel pipes tested for leakage?: Steel pipes are typically tested for leakage using various methods such as hydrostatic testing, ultrasonic testing, or dye penetrant testing. Hydrostatic testing involves pressurizing the pipe with water or another suitable liquid to a predetermined level and checking for any pressure drop over a specific period of time, indicating potential leakage. Ultrasonic testing utilizes high-frequency sound waves to detect any defects or cracks in the pipe wall that may cause leakage. Dye penetrant testing involves applying a colored liquid to the surface of the pipe, which seeps into any cracks or openings, making them easily visible under specific lighting, thus identifying potential leaks.

Q: How are steel pipes used in the manufacturing of appliances?: Steel pipes are commonly used in the manufacturing of appliances for various purposes such as transporting fluids, gases, and air within the appliance, providing structural support, and acting as conduits for electrical wiring. They are also used for creating ventilation systems and heat transfer mechanisms, ensuring efficient operation and durability of appliances.

Q: How are steel pipes used in the construction of nuclear power plants?: Steel pipes are used in the construction of nuclear power plants for various purposes, including transporting coolant, steam, and gases, as well as providing structural support for the overall system. These pipes are specifically designed to withstand high pressures, extreme temperatures, and corrosive environments, ensuring the safe and efficient operation of the nuclear power plant.

Q: Can steel pipes be used for conveying slurry and slurries?: Steel pipes are versatile and can be used to transport slurry and slurries. They are frequently employed in a range of applications, including the conveyance of fluids, gases, and solids. These pipes are renowned for their durability, strength, and resistance to corrosion, which makes them well-suited for handling abrasive materials like slurry and slurries. To enhance their protective capabilities against wear and tear caused by the abrasive nature of slurries, steel pipes are commonly lined with materials such as rubber or ceramic. The choice of steel grade and lining material depends on the specific requirements of the slurry being transported, including factors like particle size, concentration, and temperature. In summary, steel pipes are a dependable and efficient choice for the transportation of slurries across various industries, including mining, wastewater treatment, and chemical processing.

Q: Are steel pipes suitable for use in acidic environments?: Yes, steel pipes are generally suitable for use in acidic environments. However, the specific grade of steel and the concentration of the acid should be considered to ensure proper corrosion resistance. Coating or lining the pipes with materials such as epoxy or rubber can also enhance their resistance to acidic conditions.

Q: What are the applications of galvanized steel pipes?: Galvanized steel pipes have a wide range of applications across various industries. They are commonly used in plumbing systems for water supply and drainage systems due to their corrosion resistance and durability. Additionally, they are used in the construction industry for structural supports, scaffolding, and fencing. Galvanized steel pipes are also widely utilized in agricultural irrigation systems and in the transportation of liquids and gases.

Q: What's wrong with the 3PP anticorrosive steel tube?: At present, mainly foreign related products come out, for some countries with relatively high ambient temperature, and PP than PE to hard, so as to avoid scratching coating.

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