89 - 273 MM Tube Forming Machine for steel water pipe Production, galvanzied Tube Making

Product Overview

The High Precision Tube Forming Machine for Scaffolding Tube is designed for medium and large round steel tube production. It is suitable for scaffolding tube, steel water pipe, galvanized tube, construction tube, pressure tube and general structural pipe applications.

This line is based on the ZY-273 tube forming machine model, covering round tube outer diameter from 89 mm to 273 mm, wall thickness from 3.0 mm to 12.0 mm, finished pipe length from 4 m to 12 m, and production speed up to 40 m/min.

The machine uses roll forming and high frequency welding technology to produce welded steel tubes from steel strip coils. With suitable tooling and finishing equipment, it can also support higher-standard pipe production for construction, water transportation, gas transportation and industrial tube applications.

For buyers who need an adjustable production line, the key value is flexibility. One line can cover multiple tube sizes within the design range, helping factories respond to different market orders without purchasing separate machines for every pipe size.

Problem

Many scaffolding tube and steel water pipe manufacturers face the same problem: market demand changes frequently, but the production line must remain stable and efficient.

A customer may need 89 mm tubes for one order, 168 mm tubes for another order, and 273 mm tubes for a larger structural pipe project. If the tube forming machine is not designed with enough adjustment range, the factory will lose flexibility.

Another problem is pipe quality. Scaffolding tubes and water pipes need stable roundness, reliable weld seam quality, accurate length and consistent wall thickness. Poor forming accuracy can cause oval pipes, unstable welding, high rejection rate and customer complaints.

For galvanized tube production, surface quality and smooth handling are also important. If the forming and sizing process is not controlled well, the zinc layer may be damaged or the final pipe surface may not meet customer requirements.

Cause

The main cause is that tube forming is not a single-step process. It is a continuous production system involving uncoiling, strip end welding, accumulation, forming, high frequency welding, sizing, cutting and run-out handling.

For large pipes from 89 mm to 273 mm, the forming force is higher than small tube production. The machine needs strong mill stands, accurate roller alignment, stable transmission and reliable welding control.

For wall thickness from 3.0 mm to 12.0 mm, the raw material strength and strip thickness directly influence forming pressure, welding power and sizing accuracy. If the machine structure is weak or the roller design is not suitable, the pipe may have shape deviation or poor weld seam consistency.

For scaffolding tube and steel water pipe production, the machine must balance three requirements: production speed, pipe strength and dimensional accuracy. This is why buyers should not choose only by price. They should choose a complete tube forming solution based on pipe size, material, thickness, final application and required finishing process.

Solution

The ZY-273 High Precision Adjustable Tube Forming Machine provides a complete ERW tube production solution for medium and large round pipes.

The standard production process includes:

Uncoiler → Shear & Welding Machine → Accumulator / Cage → Forming Machine → High Frequency Welding → Sizing Machine → Flying Cold Saw → Run Out Table

The uncoiler loads the steel strip coil. The shear and welding machine connects coil ends to support continuous production. The accumulator stores strip material and allows the mill to keep running during coil change.

The forming machine gradually bends the strip into an open pipe shape. The high frequency welder heats the strip edges, and the squeeze rolls press the edges together to form a welded tube.

After welding, the sizing section controls the final pipe diameter and roundness. The flying cold saw cuts the pipe to fixed length, and the finished pipe is delivered to the run-out table.

For different customer applications, the line can be matched with straightening machine, hydro testing machine, end facing machine, galvanizing-related equipment, pipe marking system, packing system or other finishing equipment.

Specifications

Main Technical Data of ZY-273 Tube Forming Machine

Basic Raw Material Requirements

Tube Forming Machine Model Range

The above model data is for reference. The final production range and technical configuration can be adjusted according to pipe size, wall thickness, steel grade, coil specification, workshop layout and final pipe standard.

Application

Scaffolding Tube Production

The machine can produce round tubes for scaffolding systems, construction support structures and temporary building platforms.

For this application, pipe strength, wall thickness stability, weld seam reliability and length accuracy are important.

Steel Water Pipe Production

The ZY-273 line is suitable for steel water pipe production when matched with suitable raw material, welding control and downstream finishing equipment.

For water pipe applications, buyers should consider pipe straightness, hydro testing, end finishing and anti-corrosion requirements.

Galvanized Tube Making

The line can process galvanized steel strip for galvanized tube production.

For galvanized tubes, stable forming and smooth roller design help reduce surface damage and protect the coating layer.

Construction and Structural Pipe

This tube forming machine can produce large round tubes for construction frames, steel structures, guardrails, supports and industrial fabrication.

The 89–273 mm range allows the factory to cover multiple structural pipe specifications with one production line.

Fence, Pressure Tube and Industrial Tube

With suitable tooling and finishing equipment, the machine can also produce fence tubes, pressure tubes and other industrial round tubes.

For pressure-related applications, additional inspection equipment such as hydro testing and non-destructive testing should be considered.

How It Works

1. Coil Loading and Uncoiling

The steel strip coil is loaded onto the uncoiler. The uncoiler opens the coil and feeds the strip into the line.

Stable uncoiling is important because unstable strip tension can affect forming accuracy.

2. Shear and Welding

The coil head and tail are cut and welded together.

This step reduces production stoppage and supports continuous tube forming.

3. Accumulation

The accumulator stores strip material before the forming section.

During coil change, the accumulator allows the forming machine to keep running, helping improve production efficiency.

4. Roll Forming

The strip passes through forming rollers and is gradually shaped into an open round pipe.

For large tubes, roller design and mill stand strength are critical for pipe roundness and edge alignment.

5. High Frequency Welding

The high frequency welder heats the strip edges. The squeeze rolls press the heated edges together to create the welded seam.

Correct welding power, squeeze force and seam position help improve pipe strength and welding stability.

6. Sizing

The sizing machine adjusts the welded pipe to the required outer diameter and improves roundness.

This step directly affects final pipe accuracy and downstream application quality.

7. Flying Cold Saw Cutting

The flying cold saw cuts the pipe to the required length, usually from 4 m to 12 m.

Cold saw cutting provides better cutting accuracy and cleaner pipe ends.

8. Run-Out and Inspection

The finished pipes are delivered to the run-out table for inspection, collection and further finishing.

Depending on the application, the pipe can enter straightening, hydro testing, end facing, marking or packing equipment.

How To Choose

Choose by Pipe Diameter

If your required round pipe outer diameter is between 89 mm and 273 mm, the ZY-273 model is suitable.

If your maximum pipe diameter is below 219 mm, the ZY-219 model may be more economical. If your required diameter is above 273 mm, ZY-325 or larger models should be considered.

Choose by Wall Thickness

The ZY-273 machine supports wall thickness from 3.0 mm to 12.0 mm.

For thinner light-duty tubes, a smaller model may be enough. For thicker structural or pressure tubes, the machine structure, motor power and forming design must be confirmed carefully.

Choose by Final Application

For scaffolding tube production, focus on strength, weld seam quality and length accuracy.

For water pipe production, consider hydro testing, end finishing and anti-corrosion treatment. For galvanized tube production, consider surface protection and roller design.

Choose by Raw Material

The recommended material includes low-carbon steel and low alloy steel with yield strength σs ≤ 345 MPa and tensile strength σb ≤ 610 MPa.

If the material strength is higher, the machine design and forming power should be rechecked before quotation.

Choose by Coil Specification

The buyer should confirm coil inside diameter, outside diameter, strip width, strip thickness and coil weight.

For this machine, the reference coil inside diameter is Φ350–Φ450 mm, coil outside diameter is Φ600–Φ1000 mm, strip width is 280–860 mm, and coil weight is up to 15000 kg.

Choose by Adjustable Requirement

If your factory produces many pipe sizes, pay attention to roller changing method, adjustment convenience and tooling plan.

An adjustable tube forming machine should help reduce changeover time and improve production flexibility.

Choose by Finishing Equipment

A standard line includes uncoiling, forming, welding, sizing, cutting and run-out.

For higher-standard applications, buyers may add straightening machine, hydro tester, end facing machine, beveling machine, marking system, packing system or other inspection equipment.

FAQ

1. What pipe size can this tube forming machine produce?

The ZY-273 tube forming machine can produce round pipes with outer diameter from 89 mm to 273 mm and wall thickness from 3.0 mm to 12.0 mm.

It is suitable for scaffolding tube, steel water pipe, galvanized tube and structural pipe production.

2. What is the production speed of this machine?

The production speed can reach up to 40 m/min.

The actual speed depends on pipe diameter, wall thickness, steel grade, welding condition, cutting length and finishing process.

3. Can this machine produce galvanized tubes?

Yes, the machine can be used for galvanized tube production when the raw material is galvanized steel strip.

For galvanized tube production, roller surface condition, forming stability and strip handling should be controlled to reduce coating damage.

4. Can this line be used for steel water pipe production?

Yes, the line can produce steel water pipes within the designed size range.

For water pipe applications, suitable testing and finishing equipment such as straightening, hydro testing and end finishing may be required.

5. What raw material is suitable for this machine?

The recommended material is low-carbon steel or low alloy steel with yield strength σs ≤ 345 MPa and tensile strength σb ≤ 610 MPa.

Before final design, the buyer should provide steel grade, strip width, strip thickness, coil weight and final pipe application.

6. What information is needed before quotation?

The buyer should provide pipe diameter range, wall thickness range, pipe length, raw material, coil size, coil weight, production speed requirement, final application and required finishing equipment.

Factory layout and power supply information are also helpful for accurate line design.