Our stock of square and rectangular hollow sections for structural use comes in both hot and cold forms, depending on the manufacturing process used. All of the square and rectangular hollow sections we carry have been produced by manufacturers who adhere to Chinese regulations for construction materials and have received approval from a third-party notified body. These sections are guaranteed to meet strict quality control standards through Factory Production Control.
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Property of Black Rectangular Pipe |
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OD |
10*10mm-1200*1200mm |
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Thickness: |
1/2/3/4/5/6/8/10/12/12/16/18/20mm |
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Steel Grade: |
JIS G 3466, EN 10219, ASTM A53, ASTM A500, EN 10210 are prominent standards used in the realm of structural steel pipes and hollow sections. These standards outline the specifications and requirements for the manufacturing and testing of these products. BS 1387, BS 6323 |
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Marterial |
C250LO, C350LO, S235JR, S275JR, S355JR, G250, G350 (C450LO). These are all different types of steel grades used in construction and manufacturing industries. S235JR is a structural steel grade that has a minimum yield strength of 235MPa. S355JR is a higher strength structural steel grade with a minimum yield strength of 355MPa. S275JR falls in between S235JR and S355JR in terms of strength. C350LO and C250LO are both grades of structural steel with improved atmospheric corrosion resistance. G250 and G350 (C450LO) are both general structural grades of steel with good weldability and impact toughness. Overall, the choice of steel grade depends on the specific application and requirements of the project. |
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Surface: |
The options available for finishes are Hot Dip Galvanized, Pre-galvanized, Black and Painted. These finishes can be applied to threaded products to provide the desired aesthetic and protective qualities. |
The adhesion of the galvanized surface is strong, resulting in uniformity and enhanced corrosion resistance for the steel pipe. These qualities translate to a long service life for the product.
The precision of the processing method is impressive, resulting in a neat and elegant cut. The finished product boasts of a smooth and pristine look that is pleasing to the eye.
Quality is assured as the raw materials used are sourced from well-known brands with a large-scale production capacity. The pipes produced are of high quality and meet the necessary standards.
Our delivery time is impressively fast with only 10-15 days needed for delivery of hundreds of tons. We take pride in ensuring that our clients receive their orders promptly without any delay.
5.Galvanized 30-50μm (210g-350g/m2)
* Industrial Water Lines,Plan Piping
* Agriculture and Irrigation
* Galvanized Steel Fencings
* Road and Parking Barriers
* Structural and fabrication Work
* Water Pipelines
* Sewerage Systms
* Oil Pipe Lines
* Oil Refinery Piping,crude Oil piping
Q1.How is the production process?
The process of manufacturing galvanized steel pipe involves starting with a steel coil. The steel strip is first unpacked and then flattened before being curled. Next, the curled strip is welded together to create a round tube. This round tube is then rolled into a square shape and subsequently cut into the desired length. This manufacturing method ensures the production of high-quality galvanized steel pipes.
The tolerance for square and rectangular pipes refers to the allowable deviation from the specified dimensions. It is an important factor that ensures the accuracy and quality of these pipes. The tolerance may vary depending on factors such as manufacturing processes, industry standards, and customer requirements.
Square and rectangular pipes are commonly used in various applications, including construction, automotive, and furniture industries. Achieving precise dimensions is crucial for these pipes to fit together properly and perform their intended function efficiently.
The tolerance for square and rectangular pipes is typically specified in terms of the allowable deviation from the desired dimensions. This can include variations in length, width, thickness, and other relevant measurements. Manufacturers strive to meet these tolerance requirements to ensure the pipes meet the necessary specifications and can be used effectively in different applications.
The tolerance for square and rectangular pipes can vary depending on the specific requirements of the customer or industry standards. For example, some applications may require tighter tolerances to ensure a more precise fit, while others may allow for slightly larger deviations.
To achieve the desired tolerance, manufacturers employ various techniques and quality control measures during the manufacturing process. This can include using precision machinery, closely monitoring the dimensions at different stages of production, and conducting thorough inspections to identify any deviations from the specified tolerances.
It is important for manufacturers and customers to communicate and agree upon the tolerance requirements for square and rectangular pipes before production begins. This ensures that both parties are aligned with the desired dimensions and can avoid any potential issues that may arise from deviations in tolerance.
In conclusion, the tolerance for square and rectangular pipes is a critical factor in ensuring their accuracy and quality. Manufacturers strive to meet the specified tolerances to ensure the pipes can fit together properly and perform their intended function effectively.
If the wall thickness is less than 10mm, the tolerance should not exceed 10% of the wall thickness. In order to create a similar content, the above information can be rearranged and presented as follows: For walls that have a thickness under 10mm, it is crucial that the tolerance level does not go beyond 10% of the thickness of the wall.
，≥10mm，8%。。
The standard of square rectangular tubes varies across different industries. It is essential to understand the requirements and specifications in each specific field.
The steel pipe should not have a curvature exceeding 1.0mm per meter. Furthermore, both ends of the pipe must have perpendicular end faces, with any incision burrs removed. These requirements ensure that the steel pipe is of high quality and suitable for its intended use.
To prevent corrosion, a layer of protective oil should be applied to the surface of the steel pipes.
The mechanical properties of steel pipes need to meet the specifications of the API SPEC 5CT for the N80 steel grade. To achieve this, proper heat treatment is necessary. By subjecting the steel pipes to the appropriate heat treatment process, their mechanical properties can be adjusted to align with the requirements of the N80 steel grade. It is imperative to ensure that the heat treatment is carried out correctly in order to achieve the desired mechanical properties.
The advantages of our galvanized square and rectangular pipes are numerous. By rearranging the above content, we can highlight the key advantages of these pipes. Galvanized square and rectangular pipes have significant benefits, making them a preferred choice in various applications.
One of the main advantages of our galvanized square and rectangular pipes is their exceptional durability. These pipes are coated with a protective layer of zinc, which enhances their resistance to corrosion. This makes them highly suitable for outdoor applications where they are exposed to harsh weather conditions or moisture.
Moreover, our galvanized pipes offer excellent strength and structural integrity due to their sturdy construction. They can withstand heavy loads and provide long-lasting performance, making them ideal for supporting structures or applications that require high strength.
Additionally, the zinc coating on these pipes promotes longevity by preventing rust and corrosion. This means that they have a longer lifespan compared to other materials, reducing the need for frequent replacements and maintenance.
Another advantage of our galvanized square and rectangular pipes is their versatility. These pipes can be easily customized and fabricated to suit specific requirements. They are available in various sizes, thicknesses, and lengths, enabling them to be used in a wide range of applications, including construction, infrastructure, automotive, and more.
Furthermore, galvanized square and rectangular pipes are cost-effective. Their initial cost may be slightly higher than non-galvanized alternatives, but their longevity and low maintenance requirements contribute to long-term cost savings.
In summary, the advantages of our galvanized square and rectangular pipes lie in their durability, strength, corrosion resistance, versatility, and cost-effectiveness. These qualities make them a reliable choice for various applications, ensuring high-performance and long-lasting results.
Our manufacturing capabilities allow us to produce the second largest size in the world, measuring up to 500*500*19mm. This impressive size range sets us apart from other manufacturers.
Our rectangular pipe with a square cross section boasts exceptional tensile strength, making it a top performer in the industry.
Our product offers a stunning appearance coupled with excellent fire resistance and anti-rust properties. The coating not only enhances the aesthetics but also ensures durability and safety. By rearranging the content, we aim to emphasize the appealing appearance, the ability to withstand fire, and the prevention of rust.
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