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Rectangular and square steel pipe introduction

Square and rectangular steel tubes, also known as hollow structural sections (HSS) or square hollow sections (SHS)/rectangular hollow sections (RHS), are widely used in the construction, engineering, and manufacturing industries. Their unique shape, strength, and versatility make them a preferred choice for various structural and architectural applications.

 

Classification of Square and Rectangular Pipes

Depending on the manufacturing process and surface treatment, square and rectangular tubes can be classified into:

• Hot Rolled Rectangular Tubes

Made from hot-rolled steel

Rougher surface finish

Lower cost, suitable for heavy-duty structural uses

• Cold Rolled Rectangular Tubes

Better surface finish and dimensional tolerance

Ideal for precision parts or visible applications

• Pre-Galvanised Rectangular Tubes

Zinc coating applied to the coil before forming

Uniform surface and good corrosion resistance

• Hot-Dip Galvanised Square Tubes

Dipped in molten zinc after forming

Thick zinc layer (up to 275g/m²)

Best for outdoor or marine environments

 

Rectangular and square steel pipe Common Specifications and Sizes

The dimensions of square and rectangular tubes are usually defined by:

Outer Dimensions (OD): width × height (e.g. 50×50 mm, 40×60 mm)

Wall Thickness: 1.2 mm – 10 mm

Length: 5.8m, 6m, 11.8m, or custom cut

Example Sizes (Metric):

Type	Size (mm)	Thickness (mm)	Length (m)
Square	25×25	1.5 – 3.0	6
Square	50×50	2.0 – 5.0	6/12
Rectangular	40×60	1.5 – 6.0	6/11.8
Rectangular	100×200	3.0 – 10.0	Custom

 

Rectangular and square steel pipe Material Grades:

Q195 / Q235 / Q345

ASTM A500 Grade B / C

EN 10219 S235 / S355

 

Rectangular and square steel pipe application

Structural Steel tube (tubing) can be used for a wide variety of mechanical applications. It may be used either statically or dynamically. I's close tolerances, good finish, and dense structure make it ideal for parts such as structural support and parts, frames, racks, trailer beds and trailer components, structural components and supports for buildings, bridges, and highways, conveyors, machine parts, guides, and supports, safety and deck rails, sign posts, athletic equipment, ornamental usages and a wide range of applications in industrial, construction, automotive, appliance, furniture and agricultural industries.

 

 

Rectangular and square steel pipe main cutting ways:

• Angle grinder

  Angle grinder is a common polishing and cutting tool. The angle grinder uses brushless DC motor to make the angle grinder have longerlife and higher performance, and at the same time reduce wear and heatgeneration during cutting.The materials of rectangle and square pipes that can be cut by an angle grinder include copper, steel, iron, aluminum, alloy, stainless steel, etc. In addition to cutting function, angle grinder can also be used for polishing, grinding and other processing operations. 

   

• Sawing machine

The sawing machine is characterized by neat cutting and convenient welding during construction. The defect is that the power is too low, that is, too slow; While band saws have low production power and minimal investment, rectangle and square pipes saws can cut several square tubes in rows at once and have a large output power, but their equipment structure is chaotic. Cutting smaller outer diameter rectangular tubes with a circular saw is appropriate, whilst cutting bigger outer diameter rectangular tubes with a band saw is appropriate;

 

• CNC Flame and plasma cutting machine

Plasma, or oxygen cutting are all included in CNC cutting. Cutting seamless steel pipes with extra-large pipe diameters and substantial wall thicknesses is better suited for this cutting technique. Cutting using plasma has a rapid cutting speed. The square tube end surface is not smooth and there is a heat-affected zone close to the cutting due to the high temperature during flame cutting.

 

Rectangular and square steel pipe CNC plasma or flame cutting machine MS-TS Introduction:

• Designed by Hubei Meisar CNC technology Co. Ltd
• Suitable for cutting workpiece: Square and rectangle pipes
• The MS-TS Square Tube CNC Cutting Machine is specifically designed for automatically calculating and cutting the ends of steel tubes.
• The equipment can be widely used in mechanical, petrochemical, construction, shipbuilding, bridge tower, and metallurgical pressure vessel industries for cutting and processing pipe structural parts.

 

 

Rectangular and square steel pipe CNC plasma or flame cutting machine MS-TS Parameter Outlook

	Item	Parameter
1	Square tube size	40*40-240*240mm(Or customized)
2	Cutting model	Plasma and or flame
3	Plasma cutting wall thickness	Depending on plasma generator
4	Effective cutting length (mm)	6000mm or customized
5	Chuck	Manual chuck 500# (Standard, or customized)
7	Cutting speed (mm/min)	10～6000mm/min
8	Moving speed (mm/min)	6000 mm/min (Can be adjusted)
9	Max loading weight (KG)	3000

 

Rectangular and square steel pipe CNC plasma or flame cutting machine MS-TS Feature:

• The MS-TS CNC rectangel and square Cutting Machine is capable of cutting the pipe in any form at its end with automatic numerical control flame/plasma thermal cutting equipment, resulting in welded molding with high precision and efficiency.
• The Six-axis linkage control system is based on many years of experience in intersection line CNC cutting systems from Shanghai Fang Ling.
• It is primarily used for rectangle and square tubes.(Most full version is with H-beams, I-beams, groove steel, as well as oval tubes, waist tubes, and other groove cutting schemes, almost meeting the needs of all types of pipes with grooves).
• Using DXF or DWG format files, it can achieve "three-dimensional node expansion" automatic programming without the need for disassembly and auxiliary calculations.
• Convenient parametric programming, bar optimization nesting, multi-bar continuous cutting, extra-long bar automatic separation, lead tangent calculation, tube dynamic three-dimensional simulation, panel slot technology, and a wealth of process management modules are included.

 

Various pipe nodes can be built or edited in this form. If more pipe nodes are needed, click "Add", and the node selection form will appear as shown.

In this form, the node patterns that need to be added are vividly depicted in three dimensions. Different prompts will appear in the lower-left corner of the form after selecting different patterns, and their background color will turn yellowish-green if selected. Click "OK" after selecting, and then enter the edit dialog for this node.

 

Rectangular and square steel pipe CNC plasma or flame cutting machine MS-TS Service

1. After-sales service and maintenance.

Installation and on-site training available.

 

2. Quality warranty.

The equipment warranty starts after inspection.

We supplier provides a one-month quality warranty for consumables such as the cutting torch and solenoid valve. For the CNC system and other control parts, we provide a 12-month warranty. (Artificial damage is not covered by the warranty, and the supplier will provide maintenance. The user will only need to cover the basic fee.)

 

Why select Hubei Meisar CNC?

High End! Professional! Create 100 Times Value for You!

We try for excellence, service the customers', hopes to be the most effective cooperation workforce and dominator company for staff, suppliers and shoppers, realizes price share and ongoing marketing for Square Round Tube Pipe Steel CNC Flame Plasma Cutting Machine. We will make unremitting efforts to provide you with high-quality products and perfect services. Welcome to our company, we are expecting to cooperate with you.

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