High Quality Hollow Section-Square Tubes
- Ref Price:
-
- Loading Port:
- China main port
- Payment Terms:
- TT or L/C
- Min Order Qty:
- 5 m.t.
- Supply Capability:
- 1000 m.t./month
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OKorder Financial Service
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High Quality Hollow Section-Square Tubes
Product Applications:
It is widely used in building, machine, chemical equipment, automobile industrial, container, it is also applied to agriculture and mine machine.
Product Specifications:
Standards: ASTM A500, GB6728
Grade: ASTM A500: A, B, C; GB6728: Q195, Q215, Q235, Q345
Sizes:
*Remark: Besides below sizes, we also can arrange production based on requirement of customers
Size (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 | 0.2 | 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 |
GB6728:
Steel Grade | CHEMICAL COMPOSITION | MECHANICAL PROPERTIES | ||||||
C (%) | Si (%) | Mn (%) | 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 | 22 |
Q215 | 0.09-0.15 | 0.3 | 0.25-0.55 | 0.45 | 0.5 | 215 | 335 | 22 |
Q235 | 0.12-0.22 | 0.3 | 0.3-0.7 | 0.45 | 0.45 | 235 | 375 | 20 |
Q345 | 0.20 | 0.55 | 1.0-1.6 | 0.45 | 0.45 | 345 | 510 | 21 |
Packaging: Packed in bundles, each bundle with 6-8 steel stripes and 2 nylon strips or one by one Or Nested into Containers
Product Images:
FAQ:
Q1: Why buy Materials & Equipment from OKorder.com?
A1: All products offered byOKorder.com are carefully selected from China's most reliable manufacturing enterprises. Through its ISO certifications, OKorder.com adheres to the highest standards and a commitment to supply chain safety and customer satisfaction.
Q2: How do we guarantee the quality of our products?
A2: We have established an advanced quality management system which conducts strict quality tests at every step, from raw materials to the final product. At the same time, we provide extensive follow-up service assurances as required.
Q3: How soon can we receive the product after purchase?
A3: Within three days of placing an order, we will begin production. The specific shipping date is dependent upon international and government factors, but is typically 7 to 10 workdays.
Q4: What makes stainless steel stainless?
A4: Stainless steel must contain at least 10.5 % chromium. It is this element that reacts with the oxygen in the air to form a complex chrome-oxide surface layer that is invisible but strong enough to prevent further oxygen from "staining" (rusting) the surface. Higher levels of chromium and the addition of other alloying elements such as nickel and molybdenum enhance this surface layer and improve the corrosion resistance of the stainless material.
Q5: Can stainless steel rust?
A5: Stainless does not "rust" as you think of regular steel rusting with a red oxide on the surface that flakes off. If you see red rust it is probably due to some iron particles that have contaminated the surface of the stainless steel and it is these iron particles that are rusting. Look at the source of the rusting and see if you can remove it from the surface.
Q6: What is the difference between galvanized steel and galvalume steel?
A6: Galvanized steel is metallic coated with Zinc in various coating weights. Minimum recommended for painted metal roofs is G90. Galvalume is a zinc and aluminum coated steel that becomes an alloy and is recommended in either painted or bare applications with a minimum coating weight of AZ50. Galvalume has an excellent performance life in bare exposures. Hence if you are using a bare panel use galvalume and if painted use either.
Q7: Is there a difference in thermal conductivity between stainless steel and steel?
A6: Yes. Stainless Steel has a lower thermal conductivity rate than steel; approximately 1/3 to 1/5th depending on the material.
Q8: Is there a difference in electrical conductivity between stainless steel and steel?
A8: Yes. Steel is generally more conductive than stainless steel. Steel has resistivity in the range of 10~20Ωm, while stainless has a resistivity of approximately 60~72Ωm.
- Q:What are the different coating materials used for steel pipes?
- There are several different coating materials used for steel pipes, including epoxy, polyurethane, coal tar enamel, and zinc. These coatings are applied to the steel pipes to provide protection against corrosion and to enhance their durability and lifespan.
- Q:Are steel pipes suitable for industrial applications?
- Yes, steel pipes are highly suitable for industrial applications. Steel pipes possess excellent strength, durability, and corrosion resistance, making them ideal for transporting fluids, gases, and solid materials in various industries such as oil and gas, construction, automotive, and manufacturing. Additionally, steel pipes can withstand high pressure, extreme temperatures, and harsh environmental conditions, making them reliable and efficient for industrial operations.
- Q:Can steel pipes be used for transporting gases?
- Yes, steel pipes can be used for transporting gases. Steel pipes are commonly used for various applications including the transportation of gases due to their durability, high tensile strength, and resistance to corrosion. They are often preferred for transporting gases over other materials due to their ability to withstand high pressure and temperature conditions.
- Q:Are steel pipes suitable for semiconductor manufacturing plants?
- Yes, steel pipes are suitable for semiconductor manufacturing plants. Steel pipes offer several advantages such as high strength, durability, and resistance to corrosion, making them ideal for transporting various fluids and gases used in semiconductor manufacturing processes. Additionally, steel pipes can withstand high pressure and extreme temperatures, ensuring the safe and efficient operation of semiconductor manufacturing plants.
- Q:Why can't stainless steel be put together with carbon steel tube?
- Stainless steel can not be put together with carbon steel because of galvanic corrosion
- Q:What are the different types of supports used for underground steel pipes?
- The different types of supports used for underground steel pipes include concrete encasement, pipe bedding, pipe cradles, and pipe hangers. Concrete encasement involves surrounding the pipe with a layer of concrete to provide additional strength and stability. Pipe bedding involves placing a layer of granular material underneath the pipe to distribute the load and prevent excessive deflection. Pipe cradles are structures that support the pipe from underneath, typically made of concrete or steel. Pipe hangers are used to suspend the pipe from above, typically attached to a structure or support system. These supports help ensure the stability and longevity of underground steel pipes.
- Q:How do you protect steel pipes from rusting?
- Steel pipes can be protected from rusting by applying a protective coating such as paint or zinc coating. Additionally, using corrosion inhibitors, maintaining proper drainage, and keeping the pipes dry can help prevent rust formation. Regular inspection and maintenance are also crucial to identify and address any potential issues before they escalate.
- Q:How are steel pipes protected against ultraviolet (UV) radiation?
- Steel pipes can be protected against ultraviolet (UV) radiation through the application of coatings or paints that act as a barrier between the pipe surface and the UV rays. These coatings are specifically designed to resist the damaging effects of UV radiation, such as fading, chalking, or degradation of the steel material. One common method of protection is the use of UV-resistant paints or polymeric coatings that contain special additives or pigments that reflect or absorb UV rays. These coatings not only shield the steel from UV radiation but also provide an additional layer of corrosion protection, extending the lifespan of the pipes. Another method used for UV protection is the application of thermal insulation materials. These insulating materials, such as foam or coatings with reflective properties, are capable of reducing the impact of UV radiation on the steel pipes. They act as a shield, preventing direct exposure to the UV rays and minimizing the potential damage caused by prolonged exposure. It is important to note that the choice of UV protection method depends on various factors, including the specific application, environmental conditions, and the required durability of the steel pipes. Consulting with experts in the field can help determine the most suitable UV protection solution for a particular project or application.
- Q:What are the different methods of pipe repair for steel pipes?
- When it comes to repairing steel pipes, there are several methods available that depend on the severity and location of the damage. Below, you will find a list of the most common methods used: 1. Welding: This method is frequently employed for fixing steel pipes, particularly when the damage is confined to a specific area. To execute this repair, the damaged portion of the pipe is removed and replaced with a new piece that is welded securely. Afterwards, the weld is thoroughly inspected to verify its strength and reliability. 2. Pipe wrapping: This approach entails wrapping a layer of fiberglass or epoxy tightly around the damaged section of the pipe. This wrap provides structural reinforcement and effectively prevents further leakage or corrosion. 3. Pipe lining: This technique involves inserting a flexible liner into the damaged pipe. The liner is typically composed of materials such as epoxy, PVC, or cured-in-place pipe (CIPP). Once inserted, the liner is either inflated or heated to conform to the shape of the pipe, creating a new inner surface that is resistant to corrosion and leakage. 4. Slip lining: Similar to pipe lining, slip lining involves placing a smaller diameter pipe inside the damaged one. The smaller pipe acts as a protective sleeve, reinforcing the structure and preventing further deterioration of the original pipe. 5. Pipe bursting: This method is utilized when the damage to the pipe is extensive. A new pipe is pulled through the damaged one using a hydraulic or pneumatic system. As the new pipe is pulled through, it bursts the old pipe, resulting in a larger diameter pipe with minimal disturbance to the surrounding area. 6. Clamp or sleeve repair: In cases where the damage is small and localized, a clamp or sleeve can be applied to temporarily or permanently fix the issue. The clamp or sleeve is placed securely over the damaged section to prevent leakage. It is important to keep in mind that the optimal method for repairing steel pipes depends on factors like the extent of damage, accessibility, cost, and structural requirements. It is recommended to consult with a professional pipe repair specialist or engineer to determine the most suitable method for your specific situation.
- Q:What are the common applications of steel pipes in the oil and gas industry?
- Steel pipes are commonly used in the oil and gas industry for various applications such as drilling, transportation of oil and gas, and pipeline construction. They provide strength, durability, and resistance to corrosion, making them suitable for carrying fluids under high pressure and in harsh environments. Steel pipes also facilitate efficient extraction, production, and distribution of oil and gas resources across vast distances.
1. Manufacturer Overview |
|
|---|---|
| Location | Hebei, China |
| Year Established | 1988 |
| Annual Output Value | Above One Hundred Million RMB |
| Main Markets | Main land; Southeast Asia; Middle East; Africa |
| Company Certifications | ISO 9002:2010；API 5L |
2. Manufacturer Certificates |
|
|---|---|
| a) Certification Name | |
| Range | |
| Reference | |
| Validity Period | |
3. Manufacturer Capability |
|
|---|---|
| a)Trade Capacity | |
| Nearest Port | Tianjin |
| Export Percentage | 30%-50% |
| No.of Employees in Trade Department | 201-500 People |
| Language Spoken: | English; Chinese |
| b)Factory Information | |
| Factory Size: | 50,000 square meters |
| No. of Production Lines | Above 15 |
| Contract Manufacturing | Meicai Metal Trading Co.Ltd |
| Product Price Range | Average |
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High Quality Hollow Section-Square Tubes
- Ref Price:
-
- Loading Port:
- China main port
- Payment Terms:
- TT or L/C
- Min Order Qty:
- 5 m.t.
- Supply Capability:
- 1000 m.t./month
OKorder Service Pledge
OKorder Financial Service
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