Hollow Section-Rectangle Tubes

Ref Price:

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 desalination plants?: Steel pipes are used in desalination plants to transport water, brine, and chemicals throughout the facility. They are highly durable and corrosion-resistant, making them ideal for handling the high-pressure and corrosive nature of the desalination process. Steel pipes ensure efficient and reliable water distribution, contributing to the overall effectiveness of desalination plants in converting seawater into fresh water.

Q: What are the common sizes of steel pipes available?: The common sizes of steel pipes available vary widely depending on the application, but some standard sizes include 1/8 inch, 1/4 inch, 1/2 inch, 3/4 inch, 1 inch, 2 inch, 3 inch, 4 inch, 6 inch, 8 inch, 10 inch, 12 inch, 14 inch, 16 inch, 18 inch, 20 inch, 24 inch, 30 inch, 36 inch, 42 inch, 48 inch, 60 inch, and 72 inch.

Q: How are steel pipes insulated to prevent noise transmission?: Steel pipes are typically insulated to prevent noise transmission by using materials such as fiberglass or mineral wool wraps. These insulating materials are wrapped around the pipes, creating a barrier that absorbs and dampens sound waves, reducing noise transmission. Additionally, acoustic lagging or jackets can also be applied to further reduce noise and vibration.

Q: What is the difference between seamless and ERW steel pipes?: Seamless steel pipes are manufactured without any welding or seams, resulting in a uniform and continuous structure. On the other hand, ERW (Electric Resistance Welded) steel pipes are created by welding the edges of the steel strip or plate together to form a tube. This welding process can cause a visible seam along the length of the pipe. While seamless pipes are generally considered stronger and more reliable due to their uninterrupted structure, ERW pipes are more cost-effective and readily available.

Q: What are the different types of steel pipe coatings for marine applications?: There are several types of steel pipe coatings commonly used for marine applications, including epoxy coatings, polyurethane coatings, and fusion bonded epoxy (FBE) coatings. These coatings are designed to protect the steel pipe from corrosion and provide resistance to marine environments. Epoxy coatings are known for their excellent adhesion and chemical resistance, while polyurethane coatings offer enhanced abrasion resistance. FBE coatings are highly durable and provide excellent corrosion protection. The choice of coating depends on the specific requirements of the marine application and the level of protection needed.

Q: How are steel pipes used in the construction of high-rise buildings?: Steel pipes are commonly used in the construction of high-rise buildings for various purposes. They are primarily used as structural elements, forming the framework and supporting the weight of the building. Steel pipes provide strength and durability, making them suitable for withstanding the vertical and lateral loads experienced by tall buildings. Additionally, steel pipes are used for plumbing and electrical systems, as well as for heating, ventilation, and air conditioning (HVAC) installations. Their versatility, reliability, and ease of installation make steel pipes an essential component in the construction of high-rise buildings.

Q: Can seamless steel pipe and ordinary steel pipe be welded?: Seamless steel tube branch and seamed two, seamed steel pipe welding is formed, all two can be welded together, if you do not allow the use of seam tube cannot connect.

Q: How are steel pipes used in the construction of tunnels?: Steel pipes are commonly used in the construction of tunnels to provide structural support, facilitate drainage systems, and carry various utilities such as water, gas, or electrical cables. These pipes are often installed as part of the tunnel's foundation or as a protective casing for the tunnel's infrastructure.

Q: Can steel pipes be used for conveying abrasive slurries?: Yes, steel pipes can be used for conveying abrasive slurries. Steel pipes are known for their durability and strength, making them suitable for handling abrasive materials. Additionally, their smooth interior surface reduces friction and minimizes the risk of clogs or blockages caused by the abrasive particles present in slurries.

Q: What is a flange and how is it used in steel pipes?: A flange is a flat, circular fitting that is attached to the end of a steel pipe. It is used to connect two pipes or fittings together, allowing for easy assembly and disassembly of the pipeline system. The flange provides a secure and leak-proof connection by bolting the flange to the adjacent flanges or equipment. It also allows for the attachment of valves, pumps, or other components to the pipeline. Overall, flanges play a crucial role in ensuring the integrity and functionality of steel pipes in various industrial applications.

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