Square Hollow Section Tubes（Hot Rolled/Cold Rolled）
- Ref Price:
-
- Loading Port:
- China Main Port
- Payment Terms:
- TT or L/C
- Min Order Qty:
- 50MT m.t.
- Supply Capability:
- based on order m.t./month
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Square Hollow Section Tubes（Hot Rolled/Cold Rolled）
Application of Square Hollow Section Tubes（Hot 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 Square Hollow Section Tubes（Hot Rolled/Cold Rolled）
ASTM A500: A, B, C
GB6728：Q195，Q215，Q235，Q345
Size of Square Hollow Section Tubes（Hot 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 |
- Q:What are the different methods of protecting steel pipes from external damage?
- There are several methods of protecting steel pipes from external damage, including coating the pipes with a corrosion-resistant material such as epoxy or polyethylene, applying a layer of protective tape, installing a cathodic protection system, using concrete or rock shielding, and implementing measures to prevent soil movement or impact damage.
- Q:How do you inspect steel pipes for defects?
- Inspecting steel pipes for defects involves a systematic approach that combines visual inspection, non-destructive testing (NDT) techniques, and specialized equipment. Here are the steps typically followed to inspect steel pipes for defects: 1. Visual Inspection: Start by visually examining the external surface of the pipe, looking for any visible signs of defects such as cracks, dents, or corrosion. Pay close attention to welds, joints, and areas susceptible to stress or damage. 2. Ultrasonic Testing (UT): Ultrasonic testing is commonly used to detect internal defects in steel pipes. It involves using ultrasonic waves that are sent into the pipe and then interpreted based on the echoes received. Any irregularities in the internal structure, like cracks or voids, can be identified and analyzed. 3. Magnetic Particle Inspection (MPI): MPI is a widely used technique to detect surface and near-surface defects such as cracks, seams, or other discontinuities. This method involves applying a magnetic field to the pipe and then applying ferromagnetic particles (usually iron-based) on the surface. These particles will accumulate and form visible indications at the areas of magnetic flux leakage caused by defects. 4. Eddy Current Testing (ECT): Eddy current testing is suitable for detecting surface and near-surface defects in conductive materials like steel. It involves inducing an alternating current into the pipe and monitoring the changes in the electrical currents induced by any defects present. These changes are then analyzed to identify and evaluate the defects. 5. Radiographic Testing (RT): Radiographic testing is performed by exposing the steel pipe to X-rays or gamma rays and capturing the resulting radiographic images. This technique allows for the detection of internal defects such as cracks, porosity, inclusions, or wall thickness variations. The radiographic images are then examined for any indications of defects. 6. Dye Penetrant Inspection (DPI): DPI is a method used to detect surface-breaking defects in steel pipes. It involves applying a liquid dye on the surface, which penetrates into any surface cracks or flaws. After allowing the dye to seep in and adequately react, excess dye is removed, and a developer is applied to draw out the dye from the defects, making them visible. 7. Pressure Testing: Pressure testing involves pressurizing the steel pipe to a predetermined level and monitoring for any pressure drops or leaks. This test ensures that the pipe can withstand the required pressure without any structural defects. It is important to note that the inspection technique used depends on various factors, such as the type of defect being sought, the size and nature of the pipe, and the specific industry standards and regulations. Inspection professionals with expertise in NDT methods and equipment are typically employed to ensure accurate and reliable results.
- Q:What are the different types of steel pipe supports for overhead piping?
- There are several types of steel pipe supports for overhead piping, including beam clamps, pipe hangers, clevis hangers, and riser clamps.
- Q:Can steel pipes be used for steam systems?
- 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.
- Q:What materials are used in scaffolding pipes?
- Safety net with dense green net, safety net of flame retardant standards GB, and safety net of flame retardant performance detection for lighter lit mesh 12 seconds after leaving the fire, flame retardant, continued burning of not more than 4S. The application of 9MM safety net rope, rope, nylon rope woven, each network should be able to withstand the impact of the national standard 1.6KN test.
- Q:How are steel pipes used in the manufacturing of chemical processing plants?
- Steel pipes are commonly used in chemical processing plants for various purposes, such as transporting fluids and gases, as well as providing structural support. They are highly resistant to corrosion, making them ideal for handling corrosive materials in the plant. Additionally, steel pipes can withstand high temperatures and pressure, ensuring the safe and efficient operation of chemical processes.
- Q:How are steel pipes tested for strength and durability?
- Steel pipes are tested for strength and durability through various methods, including destructive and non-destructive testing. Destructive testing involves subjecting the pipes to intense pressure or impact to determine their breaking point, while non-destructive testing methods, such as ultrasonic or magnetic particle testing, are used to detect any internal or surface defects that may compromise their strength and durability. These tests ensure that steel pipes meet the required standards and can withstand the intended usage conditions.
- Q:Can steel pipes be used for conveying abrasive materials?
- Yes, steel pipes can be used for conveying abrasive materials. Steel pipes are known for their durability and resistance to wear and tear, making them suitable for transporting abrasive substances such as sand, gravel, or chemicals. Additionally, steel pipes can handle high pressure and temperature conditions, further contributing to their suitability for conveying abrasive materials.
- Q:Can steel pipes be used for both high-pressure and low-pressure systems?
- Yes, steel pipes can be used for both high-pressure and low-pressure systems. Steel pipes are known for their durability and strength, making them suitable for various applications, including both high and low-pressure systems. However, it's important to consider the specific requirements and regulations of the system to ensure the appropriate type and grade of steel pipe is selected for optimal performance and safety.
- Q:Can steel pipes be used for LNG terminals?
- Yes, steel pipes can be used for LNG terminals. Steel pipes are commonly used in the construction of infrastructure for LNG terminals due to their strength, durability, and resistance to extreme temperatures. They can effectively handle the high-pressure requirements and the cryogenic temperatures involved in the storage and transportation of liquefied natural gas.
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 |
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|---|---|
| a) Certification Name | |
| Range | |
| Reference | |
| Validity Period | |
3. Manufacturer Capability |
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|---|---|
| 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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Square Hollow Section Tubes（Hot Rolled/Cold Rolled）
- Ref Price:
-
- Loading Port:
- China Main Port
- Payment Terms:
- TT or L/C
- Min Order Qty:
- 50MT m.t.
- Supply Capability:
- based on order m.t./month
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
Credit Rating, Credit Services, Credit Purchasing
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