Square tube - Yuantai Derun Steel Pipe Manufacturing Group

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Yuantai Derun Is The Largest Square Tube Manufacturer In China

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Square Tube & Pipe

Dimensions:10*10-1200*1200mm or custmized
W.T.: 0.5-60mm or custmized
Length:0.5-26.5m or custmized
Grade：Gr.A/B/C,S235/275/355/420/460,A36,SS400,Q195/235/355,STKR400/490,300W/350W,etc.
Standard：
ASTM A500/A501,EN10219/10210,JIS G3466,GB/T6728/3094 AS1163, CSA G40.20/G40.21,etc.
Surface Treatment：Bare,oil,painted,galvanized,etc.
MOQ: 2-5 Tons
Capacity: 5 million tons / year
Packaging: PVC package or follow your needs
Port of origin: Tianjin Port
Payment：TT/LC,etc

Hot Selling Square Tubing

Types Of Square Pipe

Black Square Tubing

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Zinc Aluminum Magnesium Coated Square Tube

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Hot Dip Galvanized Square Pipe

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Pre Galvanized Square Tube

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: China Top 500 Enterprises

: 22 years manufacturing experiences

: 80 R&D patent technologies

: 200000 tons of spot inventory

22+ Years Of

Industry experience

Quality square pipe manufacturers

Yuantai Derun was the largest square pipe supplier in China

Our main square piping products include black steel square tube, hot galvanized square tube,ZAM coating square tube,pre galvanized square tube. What’s more, we have various kinds of special shaped square tube.We believe there will always be one for you.

5 Million Tons / Year
High Production Capacity
Precision
High Precision
100%
High Quality
Efficiency
High Efficiency

Advantage Of Using Square Tube

High strength

Square tubes have high tensile, impact, and bending strength, and can withstand large loads and pressures, making them suitable for making various structural components.

Stability

Because all four sides of the sq pipe&tube are flat, this adds stability to the structure.

Bending Resistance

The bending resistance of box tubings is stronger than that of round pipes.

Easy To Transport

Unlike round pipes, square section pipes are easier to stack and store, making transportation and storage more convenient. Circular pipes have rolling properties, making them inconvenient to stack.

Corrosion Preventive

After surface treatment such as hot-dip galvanizing, the corrosion resistance of the square tube is greatly improved, and its service life can reach more than 30 years.

Sustainable Development

The use of square steel pipes reduces the logging of wood and other vegetation, and is also a recyclable and environmentally friendly metal building material.

Support Services We Offer

From design to finished product, we pursue perfection at every step.

1. Pipe Cutting

2. Tube Polishing

3. Tube Punching

4. Pipe End Flat

5. Pipe Galvanizing

6. Pipe Bending

7. Pipe Painting

8. Four Corner Heating

9. Heat Treatment

10. Tube Oiling

11. Spray Marking

12. Pipe Welding

Application Scenarios

Square tube&pipe is widely used in various scenarios.

Bridge Structures

In our life and industry, square tubes are widely used in large buildings such as Hong Kong-Zhuhai-Macao Bridge, Yuantai Derun provide high quality square tube .

Building Structure

Square tube is widely used in building structures because of its excellent yield strength, tensile strength, elongation and corrosion resistance.Yuantai Derun supplied square tube for Cairo Administrative CBD, Egypt

Mechanical Manufacturing

In these high-tech fields, the high-temperature stability and mechanical properties of square tube have been fully utilized.Yuantai Derun's early square tubes were supplied to agricultural machinery factories in Henan, China。

Offshore photovoltaic bracket

Square tube are also widely used in the fields of Offshore photovoltaic bracket.

Production Process

HFW DFT Workmanship

Welded Square Tube Making Process

Step 1

High Quality Steel Coils

Step 2

Uncoiling

Step 3

Edge Trimming Welding

Step 4

Loop Storage

Step 5

Straightening

Step 6

Roll Cold Forming

Step 7

High Frequency Welding

Step 8

Cutting

Step 9

Size Testing

Step 10

Packaging And Storage

Other Square Tube Characteristic

Welding: Good
Grinding: Good
Corrosion Resistance: Poor For Black Square Tubes,Good For HDG Square Tubes
Wear Resistance: Ordinary
R Corner:
When the wall thickness is not greater than 3mm, the R-angle is not greater than 1mm;
When the wall thickness is 3-8mm, the R angle should not exceed 2mm;
When the wall thickness is above 8mm, R is not greater than 3mm;

End Finish:Smooth and flat，no burr

Weld Seam：Tight, straight, and sturdy
Flexible customization options：
1.Grade
2.Outer Diameter
3.Wall Thickness
4.Length

Product Manual

Here are the product manuals and company manuals for Yuantai Derun square bar tube

Square Tube Specification Chart Yuantai Derun Company File.pdf Pre Galvanized Square Tube Specification Chart.pdf Hot Dip Galvanized Square Tube Specification Chart.pdf Zinc Aluminum Magnesium Coated Square Tube Size Chart.pdf Project Case.pdf

how to bend square tube？

The production method of square tube bending arc is as follows:

1. Preparation work: Confirm the material and size of the square tube, as well as the radius and bending angle of the arc that needs to be made.

2. Mold making: Create a suitable wooden or metal mold based on the radius and bending angle of the arc.

3. Heating square tube: Place the square tube into a dedicated heating device and heat it to a certain temperature to soften the square tube material. The heating temperature should be determined according to the properties of the material, usually between 500-800 degrees Celsius.

4. Bending square tube: Quickly place the heated square tube into the prepared mold and apply force to bend it into the desired circular arc shape. Be careful during the operation to prevent burns or other accidents.

5. Cooling square tube: Place the bent square tube in air for natural cooling to restore its original hardness and shape.

6. Processing and Cleaning: For curved square tubes that require further processing, processes such as grinding, polishing, and painting can be carried out to obtain a smoother and more aesthetically pleasing surface.

It should be noted that when bending the circular arc of the square tube, the heating time and temperature should be reasonably controlled according to the strength and bending radius of the material to avoid excessive softening or damage to the material. In addition, safety should be taken into account during the operation process, and appropriate protective equipment and tools should be used to avoid accidents. It is best to operate under the guidance of professional processing plants or experienced personnel to ensure quality and effectiveness.

Jul 12,2024
how strong is square tube

Square tube usually refers to square pipe material, and its strength depends on its size and material. The larger the wall thickness and side length of a square tube, the stronger its structural strength and load-bearing capacity in general. The material of square tube can also affect its strength, for example, stainless steel square tube is more corrosion-resistant than carbon steel square tube, but carbon steel square tube may have higher mechanical strength.

Jul 12,2024
how to cut square tube 22.5 degrees

To cut 22.5-degree square tubes accurately and safely, use the right techniques and tools. Here are the steps and techniques you need to complete this task:

Get your tools ready. First, make sure you have the right tools for cutting square tubes. These may include angle grinders, cutting saws, or special square tube cutters. Choose tools that are right for the material and thickness of the tube. Measure and mark. Measure the length and angle of the tube before cutting. Mark a 22.5-degree angle on the square tube with a measuring tool. Make sure the markings are clear for reference during cutting. Fixed square tube: Secure the square tube during cutting to prevent movement. Use clamps on fixtures or workbenches to secure square tubes. Cutting: Cut according to your tool. When using an angle grinder or cutting saw, cut along the marked angle line at the right speed and force to avoid overheating or inaccurate cutting. Safety measures: Wear safety goggles, gloves, and earplugs during cutting to protect yourself from splashes and noise. Check the cutting quality. If necessary, you can use a file or sandpaper to trim the cutting surface.
By following the above steps and techniques, you can safely and accurately cut 22.5 degree square tubes.

Jul 12,2024
how to cut square tube 45 degrees?

To cut the 45 degree square pipe, you can use the following methods:

Use a CNC cutting machine:
First, make sure that the cutting parameters of the CNC cutting machine (such as cutting speed, cutting air pressure, equipment tension, etc.) meet the needs of cutting square tubes.
Use professional software for the design of the cutting path to ensure that the cutting angle is accurate to 45 degrees.
Place the square tube and start the CNC cutting machine to start cutting.
Manual sawing:
If the size of the square tube is not big, you can consider using a manual electric saw or saw blade for sawing.
Before sawing, the square tube needs to be fixed on a stable table to ensure that it will not move during the sawing process.
Use a cutting line to draw a 45-degree cut mark and then proceed with the sawing step-by-step.
Safety Precautions:
Wear appropriate personal protective equipment such as safety glasses, gloves and earplugs when operating.
Follow safety procedures to ensure a safe working environment.

Jul 12,2024
how to remove weld seam from square tube

1. Cutting method: This method uses a fixed blade or rotating cutting head inserted into the tube to cut burrs.
2. Rolling method: This method uses a rolling device inserted into the pipe to cause plastic deformation of the internal burrs, achieving the effect of thinning the height of the internal burrs.
3. Oxidation method: At the beginning of steel pipe welding, an oxygen flow is sprayed into the inner weld seam through a ventilation nozzle, and the residual heat of the weld seam is used to accelerate the oxidation of internal burrs, which fall off under the airflow.
4. Pulling method: When the steel pipe passes through the mold, the burrs inside the steel pipe are removed under the action of the circular blade of the floating plug.

There are 5 measures to eliminate welding stress:
1. It is best not to pull weld during welding
That is, do not weld the joints at one time, spot weld and weld in sections to release the stress continuously.
2. Use hammering weld method
During the section welding process, the weld should be hit with a hammer continuously, and the residual stress should be controlled by vibration to eliminate the generated stress.
When the weld metal cools, stress is generated due to the shrinkage of the weld. By hammering the weld area, the stress can be reduced by 1/2~1/4. The temperature should be maintained between 100-150℃ or above 400℃ during hammering, and avoid 200-300℃, because the metal is in the blue brittle stage at this time, and the hammered weld is easy to break. When multi-layer welding, each layer should be hammered except the first and last layer of welds. The first layer is not hammered to avoid root cracks, and the last layer is to prevent cold work hardening caused by hammering.
Vibration aging can eliminate 30%-50% of stress, which is an effective method to reduce welding stress.
3. Release welding stress
If the weldment allows, several small round holes can be made in a row on the weldment to release welding stress.
4. Outflow stress release gap
When welding the sealing parts, the stress release at one end should be ensured, that is, a gap for stress release should be left, and the weldment should be fully welded after it is completely cooled naturally (the gap should be left for the first section to be welded)
5. Use reasonable welding sequence and direction
First weld the weld with larger shrinkage, so that the weld can shrink more freely to minimize welding stress.
First weld the staggered short welds, and then weld the straight long welds.
First weld the welds that are subjected to greater stress during work, so that the internal stress is reasonably distributed.

Mar 26,2025
how to know square tubing price every day?

if you want to know the square tubing cost,or square pipe price today,or square tubing price per foot, or square tubing price per meter,or square tube price per kg,please contact our salesman.

Nov 5,2024

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Yuantai team has over 21 years of experience in steel pipe project applications, specializing in the production, manufacturing, and customization of square rectangular, and circular steel pipes. Warmly welcome project procurement managers, individual owners, designers, and overall sellers, etc. Write down your requirements and receive professional quotes and technical support.

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Yuantai Derun Is The Largest Square Tube Manufacturer In China

Square Tube & Pipe

Hot Selling Square Tubing

Types Of Square Pipe

5 Million Tons / Year

Precision

100%

Efficiency

Advantage Of Using Square Tube

High strength

Stability

Bending Resistance

Easy To Transport

Corrosion Preventive

Sustainable Development

Support Services We Offer

1. Pipe Cutting

2. Tube Polishing

3. Tube Punching

4. Pipe End Flat

5. Pipe Galvanizing

6. Pipe Bending

7. Pipe Painting

8. Four Corner Heating

9. Heat Treatment

10. Tube Oiling

11. Spray Marking

12. Pipe Welding

Application Scenarios

Bridge Structures

Building Structure

Mechanical Manufacturing

Offshore photovoltaic bracket

Production Process

HFW DFT Workmanship

Welded Square Tube Making Process

High Quality Steel Coils

Uncoiling

Edge Trimming Welding

Loop Storage

Straightening

Roll Cold Forming

High Frequency Welding

Cutting

Size Testing

Packaging And Storage

Other Square Tube Characteristic

Product Manual

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Product

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