90 m/min High Speed Section Tube Mill Machine for Structural Pipe Production

ZHANGJIAGANG ZHONGYUE WELDED PIPE MILL_MODEL ZY165

Product Overview

The 90 m/min High Speed Section Tube Mill Machine is designed for continuous production of welded steel tubes and section tubes used in construction, machinery, furniture, industrial frames, guardrails, and light steel structures.

This machine is suitable for producing round pipes, square tubes, rectangular tubes, and customized section tubes from carbon steel, cold-rolled steel, hot-rolled steel, galvanized steel, or low-alloy steel strip.

The key value of this tube mill is not only high speed. It helps manufacturers control forming accuracy, welding stability, tube shape consistency, cutting quality, and continuous production efficiency.

Problem

Many tube manufacturers want higher output, but speed often creates new quality problems.

When the line speed increases, common defects include unstable tube shape, weak weld seams, poor straightness, inaccurate cutting length, large burrs, surface scratches, and higher scrap during coil change.

For section tube production, the challenge is even more obvious. Square, rectangular, and special section tubes require stable forming force, accurate roll design, and reliable sizing control.

Clear Answer

A qualified 90 m/min high speed section tube mill should be selected according to tube shape, size range, wall thickness, material grade, welding power, forming method, cutting system, and automation level.

High speed only creates value when the machine can maintain stable tube quality during continuous production.

Cause

Most quality problems in high-speed tube production come from poor process matching.

If the roll pass design is not suitable, the strip edges may not align correctly before welding. This can cause unstable weld seams and deformation after sizing.

If the welding power does not match the tube size, wall thickness, and line speed, the weld seam may be weak or overheated. Both conditions can reduce finished tube quality.

For square, rectangular, and section tubes, sizing accuracy is especially important. If the sizing mill is not rigid enough, the tube may lose shape after cooling or during cutting.

Production continuity is another important factor. Without a suitable accumulator, the forming and welding section must stop during coil change, causing downtime, restart waste, and unstable product quality.

Solution

The 90 m/min High Speed Section Tube Mill Machine provides a complete welded tube production solution from steel coil to finished tube.

The standard line normally includes uncoiler, shear and end welder, strip accumulator, forming mill, high-frequency welding system, weld bead removal device, cooling section, sizing mill, straightening unit, flying saw or cold saw, run-out table, and optional packing equipment.

The forming section gradually shapes the flat steel strip into the required tube profile. Proper roll design helps control forming stress and keeps the strip edges stable before welding.

The high-frequency welding system heats the strip edges quickly and completes longitudinal seam welding through squeeze rolls. This process supports continuous production and stable weld seam control.

After welding, the tube passes through cooling, sizing, and straightening. These sections control the final tube dimension, shape accuracy, corner quality, and straightness.

For factories with higher output requirements, the line can be equipped with automatic size adjustment, online inspection, automatic marking, bundling, and packing systems.

Zhongyue Metallurgy Equipment Technology can customize the line according to tube drawing, material grade, wall thickness, production speed, workshop layout, power supply, and target application.

Specifications

The following specifications are reference parameters. Final configuration should be confirmed according to tube size, wall thickness, material condition, production speed, and application requirement.

Application

This high speed section tube mill machine is suitable for manufacturers producing welded tubes and structural section tubes for multiple industries.

Construction and Structural Tubes

The machine can produce square tubes, rectangular tubes, and round pipes for building frames, support structures, steel platforms, scaffolding parts, and light steel construction.

For these applications, tube straightness, weld seam stability, and dimensional consistency directly affect installation quality.

Industrial Frames and Machinery

Section tubes are widely used in machinery frames, conveyor systems, equipment bases, warehouse racks, and industrial support structures.

Stable tube shape and accurate cutting length help reduce welding, assembly, and fabrication problems in downstream processing.

Furniture and Commercial Products

The machine can produce tubes for table frames, chair frames, shelves, display racks, storage systems, and commercial metal products.

For visible products, surface condition, tube shape, and cutting quality are important for polishing, coating, and assembly.

Fence, Guardrail, and Outdoor Structures

Round, square, and rectangular tubes are commonly used for fences, guardrails, road barriers, gates, and outdoor protection systems.

For these products, consistent tube size and stable batch production help improve installation efficiency.

Solar Mounting and Agricultural Structures

The line can also produce tubes for solar mounting systems, greenhouse frames, agricultural supports, and light outdoor structures.

These applications require efficient production, repeatable tube dimensions, and reliable forming quality.

How It Works

The production process starts with steel coil loading. The uncoiler holds the coil and feeds the strip into the line.

The shear and end welder connects the end of one coil with the beginning of the next coil. This helps reduce downtime during continuous production.

The strip accumulator stores material so the forming and welding section can continue running during coil change.

The forming mill gradually bends the flat steel strip into round, square, rectangular, or section tube shape through multiple roll stands.

The high-frequency welder heats the strip edges rapidly. The squeeze rolls press the heated edges together to form a continuous longitudinal weld seam.

After welding, the tube passes through bead removal, cooling, sizing, and straightening sections. These steps control the final size, shape, and straightness.

Finally, the flying saw or cold saw cuts the tube into fixed lengths. Finished tubes are sent to the run-out table for inspection, bundling, packing, or further processing.

How To Choose

1. Confirm the Main Tube Shape

Before selecting the machine, confirm whether the factory mainly produces round pipe, square tube, rectangular tube, or special section tube.

Different tube shapes require different roll design, forming method, sizing structure, and size-change solution.

2. Confirm Size Range and Wall Thickness

Tube size and wall thickness determine the mill model, forming stand strength, motor power, welding power, and cutting system.

A high-speed line for thin-wall small tubes is different from a stronger line for thicker structural tubes.

3. Match 90 m/min Speed with Real Products

The 90 m/min speed is a reference maximum speed under suitable tube size, wall thickness, material, and cutting conditions.

For larger or thicker tubes, the practical speed should be reduced to keep weld quality, shape accuracy, and cutting stability.

4. Choose the Right Welding Power

High-frequency welding power must match material grade, wall thickness, line speed, and tube size.

Insufficient power may cause weak weld bonding. Excessive power may cause overheating, large burrs, and unstable seam quality.

5. Select the Forming Method

Round-to-square forming is suitable for many general tube production lines and offers flexible product coverage.

Direct square forming is suitable when the factory mainly produces square and rectangular tubes and needs faster size change.

6. Choose Flying Saw or Cold Saw

Flying saw is suitable for continuous high-speed production and general cutting requirements.

Cold saw is recommended when the customer needs smoother pipe ends, less burr, higher length accuracy, and better downstream assembly quality.

7. Plan Automation and Future Expansion

If the factory needs higher output and lower labor cost, automatic control, online inspection, automatic marking, bundling, and packing should be considered.

If future products may include larger tubes or thicker walls, the machine should reserve capacity in forming stands, motors, welding power, and cutting system.

FAQ

1. What does “section tube mill machine” mean?

A section tube mill machine is used to produce welded tubes with different cross-section shapes, such as round, square, rectangular, or customized section tubes.

It is widely used for construction, machinery, furniture, guardrails, and industrial frame production.

2. Can the machine really reach 90 m/min?

Yes, the machine can reach up to 90 m/min under suitable tube size, wall thickness, material grade, and cutting conditions.

For larger or thicker tubes, the actual production speed should be adjusted to protect weld seam quality and dimensional stability.

3. Can this line produce both round and square tubes?

Yes. The machine can be configured to produce round pipes, square tubes, and rectangular tubes.

For square and rectangular tubes, customers can choose round-to-square forming or direct square forming according to product range and size-change frequency.

4. What information is needed before quotation?

The customer should provide tube shape, size range, wall thickness, steel grade, target speed, annual capacity, workshop layout, power supply, cutting length, and final application.

Tube drawings or sample photos can help make the technical configuration more accurate.

5. Can the machine be customized?

Yes. The machine can be customized according to tube shape, wall thickness, material, production speed, welding power, cutting method, automation level, and workshop layout.

Zhongyue Metallurgy Equipment Technology can provide machine configuration, layout design, technical communication, installation guidance, and after-sales support for tube mill projects.