
A Pipe Straightener Machine is designed to correct bending and deformation in steel pipes, improving their straightness after pipe forming, welding, or other manufacturing processes.
The machine uses multiple straightening rollers arranged at different positions to apply controlled pressure to the pipe. As the pipe passes through the rollers, repeated bending corrections help reduce curvature and improve the overall straightness.
The Pipe Straightener Machine works through a multi-roller straightening process. Multiple rollers are arranged along the pipe feeding direction, applying pressure from different positions to gradually correct pipe deformation.
During operation, the pipe passes continuously through the roller system. By adjusting the roller positions, the operator can control the straightening pressure according to the pipe specifications and required straightness.
The main working process:
Straightening Rollers
The rollers are the main working components of the machine. They contact the pipe surface and apply pressure from different directions to correct bending. Roller quantity, arrangement, and dimensions can be designed according to the pipe specifications.
Worm Gear & Worm Shaft Adjustment
The machine can adopt a worm gear and worm shaft adjustment mechanism. Operators turn the handwheels to adjust the roller positions, allowing convenient mechanical adjustment of the straightening pressure.
Roller Material
The straightening rollers can be manufactured from hardened alloy steel to provide good wear resistance and durability during continuous operation. Roller material and surface treatment can be selected according to the pipe material and working conditions.
Drive System
The machine uses an AC motor and mechanical transmission system to drive the rollers. Motor power and transmission configuration are selected according to the required pipe size and production speed.
Heavy-Duty Machine Frame
A rigid steel frame provides stable support for the straightening rollers and transmission components, helping maintain reliable operation during the straightening process.
Speed Control
A frequency inverter can be optionally equipped to adjust the operating speed according to production requirements and coordinate with the customer's production line.


The following table shows the reference configuration of one 3-inch pipe straightener. Actual specifications are not fixed and can be customized according to customer requirements.
| Parameter | Reference Specification |
Pipe Outer Diameter | Ø38–Ø76 mm (3 inch) |
Pipe Wall Thickness | Max 4.0 mm |
Straightening Type | Roller Straightening |
| Roller Material | Hardened Alloy Steel |
Drive System | AC Motor + Transmission Shaft |
Roller Adjustment | Worm Gear & Worm Shaft |
Line Speed | Up to 60 m/min |
Installation Type | Online or Offline |
Power Supply | 380V / 50Hz (Customizable) |
The above specifications are for reference only. Roller configuration, pipe size range, motor power, operating speed, and other technical parameters can be customized according to the customer's actual production requirements.
According to the production process and factory layout, a Pipe Straightener Machine can be installed in two different ways.
| Type | Description |
Online Pipe Straightener | Installed directly in the pipe production line to straighten pipes continuously during manufacturing. |
Offline Pipe Straightener | Operates independently to straighten finished or semi-finished pipes in separate batches. |


Different pipe specifications require different straightening roller arrangements, adjustment ranges, and drive configurations.
To recommend a suitable machine, AIS Machinery needs the following information:
| Information | Requirements |
Pipe Shape | Round, square, or rectangular |
Pipe Diameter / Size | Minimum and maximum dimensions |
| Wall Thickness | Minimum and maximum thickness |
Pipe Material | Carbon steel, stainless steel, etc. |
Pipe Length | Standard pipe length |
Production Speed | Required line speed |
Straightness Requirement | Required straightness tolerance |
Installation Type | Online or offline |
Based on these details, we can recommend a suitable roller arrangement, adjustment system, and drive configuration for your application.
Q1: How are the straightening rollers adjusted?
The machine can use a worm gear and worm shaft mechanism with manual handwheels. Operators adjust the roller positions to control the straightening pressure.
Q2: Can the machine handle different pipe diameters and wall thicknesses?
Yes. The roller arrangement, adjustment range, and drive system can be customized according to the customer's pipe specifications.
Q3: Is a pipe straightener necessary for every ERW tube mill?
No. It is optional auxiliary equipment. Whether it is needed depends on the pipe straightness requirements and the customer's production process.
Q4: Can the machine straighten square and rectangular tubes?
Different pipe shapes require different roller designs. Round pipe straighteners and square/rectangular tube straighteners generally need different configurations.
Looking for a suitable Pipe Straightener Machine for your steel pipe production?
AIS Machinery provides customized pipe straightening solutions for different pipe sizes, materials, and production requirements.
Whether you need an online straightener integrated into an ERW tube mill or an independent offline machine, our team can help you select the right configuration.
Contact us with your pipe specifications and production requirements to get a suitable technical solution and quotation.

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