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 insulating steel pipes?
- There are several methods of insulating steel pipes, including using insulation wraps, foam insulation, fiberglass insulation, and pre-insulated pipe systems. Insulation wraps are typically made of materials like rubber or polyethylene and are wrapped around the pipe to provide thermal insulation. Foam insulation involves applying a layer of foam insulation directly onto the surface of the pipe. Fiberglass insulation is another common method, where fiberglass material is wrapped around the pipe to provide insulation. Pre-insulated pipe systems are complete pipe systems that come with built-in insulation and are ready to be installed. These methods help prevent heat loss or gain in the pipes, maintain temperature control, and prevent condensation.
- Q:What are the factors to consider while selecting steel pipes for a project?
- When selecting steel pipes for a project, some important factors to consider include the intended application or purpose of the pipes, the required strength and durability, the size and dimensions needed, the corrosion resistance requirements, the availability and cost, and any specific industry standards or regulations that need to be met.
- Q:What are the different international standards for steel pipes?
- The industry recognizes and utilizes multiple international standards for steel pipes. Some noteworthy standards are as follows: 1. ASTM A53: This standard encompasses black and galvanized steel pipes, both seamless and welded. It finds common application in low-pressure scenarios involving water, gas, and steam. 2. ASTM A106: This standard covers seamless carbon steel pipes designed for high-temperature usage. It sees widespread use in refineries, power plants, and petrochemical industries where elevated pressure and temperature conditions prevail. 3. ASTM A312: This standard pertains to austenitic stainless steel pipes that are seamless, welded, and heavily cold worked. It is frequently employed in industries such as chemical processing, food processing, and pharmaceuticals, where high temperatures and corrosive environments are encountered. 4. API 5L: This standard outlines the requirements for manufacturing seamless and welded steel pipes for use in pipeline transportation systems within the petroleum and natural gas industries. It specifies two product specification levels (PSL1 and PSL2). 5. EN 10216: This European standard addresses seamless steel pipes utilized for pressure purposes. It finds application in various industries, including power generation, chemical, and oil and gas. 6. JIS G3454: This Japanese standard focuses on carbon steel pipes used for pressure service, commonly employed in the transportation of water, gas, and oil. 7. DIN 2448: This German standard provides specifications for seamless steel pipes used for general purposes. It is extensively utilized across various industrial applications. These examples represent only a fraction of the numerous international standards governing steel pipes. Each standard delineates distinct requirements concerning manufacturing, dimensions, mechanical properties, and testing to ensure the pipes' quality and performance in specific applications. Manufacturers, suppliers, and users must comprehend and adhere to the relevant standards to guarantee the safe and reliable utilization of steel pipes.
- Q:Are steel pipes resistant to impact?
- Yes, steel pipes are generally resistant to impact due to their high strength and durability. They can withstand external forces and are less likely to deform or break upon impact compared to other materials.
- Q:What is a tight steel tube?
- The tight steel tube is called "galvanized steel pipe with sleeve connection" or "flat pipe of steel metal for electrical installation". JDG. The utility model relates to a novel protective conduit for an electric circuit. The connecting sleeve and the metal accessory are provided with a wire pipeline composed of screw fastening connection technology, and the utility model does not need to do cross grounding, welding and covering, and the appearance is silvery white or yellow.
- Q:What are the different methods of pipe protection for steel pipes?
- There are several different methods of pipe protection for steel pipes, each serving a unique purpose and providing varying levels of protection. Some of the common methods include: 1. Coatings: Coatings are applied on the external surface of steel pipes to protect them from corrosion and other environmental factors. Coating materials can include various types of paints, epoxies, or polymers. These coatings create a barrier between the pipe surface and the surrounding environment, preventing the steel from coming into contact with corrosive elements. 2. Wrapping: Wrapping involves using a protective material, such as tape or shrink wrap, to cover the steel pipe. This method provides a physical barrier against moisture, chemicals, and other corrosive substances. Wrapping is often used in combination with coatings to enhance the overall protection. 3. Cathodic Protection: Cathodic protection is an electrochemical method used to protect steel pipes from corrosion. It involves connecting the steel pipe to a sacrificial anode, typically made of zinc or magnesium. The anode corrodes instead of the pipe, which helps to prevent the steel from deteriorating. This method is commonly used for buried or submerged pipelines. 4. Thermal Insulation: Thermal insulation is used to protect steel pipes from extreme temperatures. Insulating materials, such as foam or mineral wool, are applied around the pipe to minimize heat transfer. This method is particularly important for pipes carrying hot fluids or exposed to extreme weather conditions. 5. Vibration Dampening: Vibration can cause stress and fatigue on steel pipes, leading to potential damage. To protect against vibrations, various techniques can be employed, such as using vibration damping pads or installing supports and clamps. These methods help to absorb and dissipate the energy generated by vibrations, reducing the risk of pipe failure. 6. Concrete Coating: For pipelines installed underwater or in highly corrosive environments, concrete coating is often used. A layer of concrete or a cement-based mortar is applied to the steel pipe, providing both mechanical protection and resistance to corrosion. It is important to select the appropriate method of pipe protection based on the specific application, environmental conditions, and desired level of protection. Regular inspection and maintenance are also crucial to ensure the long-term integrity of steel pipes.
- Q:How do you calculate the flow rate of water in steel pipes?
- To calculate the flow rate of water in steel pipes, you can use the equation Q = A × V, where Q represents the flow rate in cubic meters per second, A denotes the cross-sectional area of the pipe in square meters, and V represents the average velocity of the water in meters per second.
- Q:What are the factors to consider when designing a steel pipe system?
- To ensure the functionality, durability, and efficiency of a steel pipe system, several factors must be taken into account during the design process: 1. It is crucial to determine the maximum pressure and temperature the system will be exposed to. This information is essential for selecting the appropriate pipe material, thickness, and jointing method to withstand the system's operating conditions. 2. The selection of the right material for the steel pipes is important. Factors such as corrosion resistance, strength, and cost should be considered. Common materials include carbon steel, stainless steel, and alloy steel. 3. Calculating the adequate pipe size and wall thickness is essential to ensure the required flow rate and pressure drop within the system. The pipe size directly affects the system's efficiency and must be chosen based on the anticipated flow rates and pressure losses. 4. Proper support and anchoring are critical to prevent sagging, movement, and stress on the steel pipe system. The design should take into account the weight of the pipes, the fluid being transported, and any external forces acting on the system. 5. Expansion joints or loops should be incorporated to allow for thermal growth and contraction, preventing damage and distortion caused by temperature variations. 6. Understanding the properties of the fluid being transported, such as corrosiveness, viscosity, and potential for sedimentation or scaling, is important in selecting the appropriate pipe material and protective coatings or linings. 7. Consideration should be given to the accessibility of the system for installation, inspection, and maintenance purposes. The design should include proper access points, valves, and fittings to facilitate easy maintenance and repairs. 8. Environmental factors such as extreme temperatures, humidity, or corrosive substances should be taken into account when selecting the pipe material, protective coatings, and insulation. 9. Compliance with industry standards, codes, and regulations is essential. The design should adhere to safety guidelines and applicable building codes to ensure the integrity and longevity of the pipe system. 10. The overall cost of the steel pipe system, including material, installation, maintenance, and energy consumption, should be considered. Balancing cost-effectiveness with performance requirements is crucial in achieving an efficient and economical design. By considering these factors, engineers and designers can create a steel pipe system that is suitable for its intended purpose, ensuring its longevity, reliability, and safety.
- Q:How are steel pipes insulated?
- Steel pipes can be insulated using various methods such as applying insulation materials like foam or fiberglass wraps, using thermal tapes, or employing pre-insulated pipe systems where insulation is integrated into the pipe during manufacturing.
- Q:How are steel pipes protected from corrosion in corrosive environments?
- Steel pipes are protected from corrosion in corrosive environments through various methods such as applying protective coatings, using cathodic protection systems, and implementing corrosion inhibitors.
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 |
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| 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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