Square Pipe
Your Professional Square Pipe Supplier
Our goal is to become your true partner in the field of square pipe in China. GNEE Group has more than 2,000 professional staff. With high quality steel pipes and professional services, GNEE Group has won the recognition and support of customers at home and abroad in the industries and has become a globally renowned steel pipe supply group. Our company is committed to applying advanced manufacturing technology and strict quality control standards to every product. The price is competitive and the product is quality-assured, which is a good choice for your long-term cooperation.
Why Choose Us
Production market
GNEE Group exports steel to more than 160 countries including Thailand, Vietnam, South Korea, the United States, Chile, the United Kingdom, Saudi Arabia, the United Arab Emirates and Canada.
Our certification
The company has passed ISO9001, SGS, CE and other certifications.
Quality control
GNEE Group is committed to providing high-quality products to global customers. From the signing of the contract, from raw material procurement, production to inspection, the entire process is strictly in accordance with national standards such as ASTM, ASME, JIS, EN, DIN, etc.
Our service
The company has a professional sales team to provide you with high-quality pre-sales consulting services. During the order production process, customers can communicate with us at any time to understand the production progress. At the same time, we provide high-quality after-sales service to meet the different needs of customers.
Advantages of Square Pipe
Light weight
Compared with other building materials, square tubes are lighter in weight, easy to transport and install, and reduce the load-bearing requirements of the building.
High strength
Square tubes are produced from high-quality cold-rolled steel plates, which have high strength and toughness and can withstand large loads and forces.
Low cost
Compared with other metal materials, the cost of square tubes is relatively low, and production tasks can be completed while saving costs.
Strong anti-corrosion ability
The surface of square pipes can be treated in various ways, such as coating and spray painting, to improve its anti-corrosion ability.
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Standard |
BS EN 10210 |
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Size |
20*20mm-400*400mm |
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Wall Thickness |
0.5mm - 25mm |
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Length |
6000-14000 mm |
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Type |
Seamless/ Welded / ERW |
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Dimensional Tolerances |
Thickness: (All sizes +/- 10%) |
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Packing |
In bundles, Anticorrosion heat preservation, Varnish coating, Ends can be bevelled or square cut, End Capped Certification & supplementary test, Finishing & Identity Mark |
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Available Grades |
S235JRH, S275J0H, S275J2H, S355J0H, S355J2H, S355J2+N, IS 4923 / ASTM A500 / As Per Requirement |
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Surface Protection |
Black (Self Coloured uncoated), Varnish/Oil Coating, Pre-Galvanized, Hot Dip Galvanized |
Types of Square Pipe
Mild steel square pipes: Mild steel square pipes are widely utilised in building projects because of their exceptional blend of durability and cost-efficiency. These pipes are commonly utilised in the construction of building frameworks, support structures, and various fabrication operations.
Stainless steel square pipes: Stainless steel square pipes are highly regarded in architectural and interior design projects due to their exceptional corrosion resistance and aesthetically pleasing look.
Galvanized square pipes: The galvanization process involves the application of a zinc coating onto square pipes, thereby augmenting their ability to withstand corrosion. The utilisation of these pipes is crucial in outdoor scenarios where the potential for rust and degradation due to exposure to environmental elements exists.
Structural square pipes: Structural square pipes, which have been specifically designed to withstand substantial loads and resist stress, play a vital role in building and infrastructure endeavours.
Alloy steel square pipes: Alloy steel square pipes combine the inherent strength of steel with the distinctive characteristics imparted by alloying elements. These pipes are utilised in applications that require high strength, tolerance to extreme temperatures, and remarkable mechanical qualities.
Seamless square pipes: Seamless square pipes, which are produced without the presence of welded seams, provide an enhanced inner surface quality and improved dimensional precision. These devices are well-suited for various applications that involve the movement of fluids, including pipelines and hydraulic systems.
Erw square pipes: Electric resistance welded (erw) square pipes are manufactured through the fusion of the edges of a flat steel sheet, thereby yielding a robust and economically viable solution.
Application of Square Pipe
Construction field
Square tubes are widely used in the construction field, mainly used for support structures, pipeline systems, etc. Their advantages such as high strength and low cost are very obvious.
Machinery manufacturing field
Square tubes are also widely used in the mechanical field, such as for manufacturing machine brackets, forklift frames, etc. Their advantages such as easy processing and high strength can be used very well.
Furniture manufacturing field
When used in furniture manufacturing, square tubes are easy to process and have various shapes, and can be made into various forms of furniture.
Preparation stage: The main raw material for producing square tube is low carbon steel or low alloy steel. In the raw material preparation stage, the raw materials need to be inspected and classified, high-quality steel plates need to be selected, and strict quality inspections need to be carried out to ensure that the raw materials meet the relevant standards and requirements.
Cutting stage: In the cutting stage, the square steel needs to be cut to the required length, which is a key step in production. Advanced equipment and technology need to be used to ensure the precise size and shape of the pipe.
Forming stage: In the forming stage, the cut square steel needs to be bent and formed. Professional forming equipment, such as hydraulic forming machine or mechanical forming machine, is required in this process to ensure that the shape and size of the square steel meet the requirements.
Sizing stage: During the sizing stage, the diameter and roundness of the formed square steel need to be adjusted. Professional sizing equipment, such as sizing machines or straightening machines, are required in this process to ensure that the diameter and roundness of the square steel meet the requirements.
Heat treatment stage: During the heat treatment stage, the square steel needs to be heated, insulated and cooled to improve its mechanical properties such as strength and hardness.
Surface treatment stage: During the surface treatment stage, the square steel needs to be surface treated to improve its corrosion resistance and aesthetics. The surface treatment method can be selected according to different requirements, such as shot peening, painting, galvanizing, etc.
Inspection stage: During the inspection stage, the square steel needs to be inspected for appearance and size to ensure that it meets the requirements. If defects or dimensional deviations are found, repairs or adjustments are required.
We are experts at taking custom designs and fabricating them into finished products. From the simplest to the most complex shapes, we will manufacture your product with extreme attention to detail and meticulous craftsmanship.
We are able to manufacture nearly any shape, including elliptical, flat oval, square, and round. Custom tubing can be made from nearly any material and can have nearly any surface finish you require.
Even with custom designs, we can achieve outside tolerances as tight as .0003″, inside tolerances as tight as ±.0005″, tube walls as tight as ±.0003″ and lengths as tight as ±.001″.
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Packing |
In bundle |
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Shipping |
Shipped by road, sea, rail or air |
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