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Induction heating for tube and pipe welding

Induction welding

Induction welding is used for longitudinal welding in the tube and pipe industry.
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What is induction welding?

With induction welding, the heat is electromagnetically induced in the workpiece. The speed and accuracy of induction welding makes it ideal for edge welding of tubes and pipes. In this process, pipes pass an induction coil at high speed. As they do so, their edges are heated, then squeezed together to form a longitudinal weld seam. Induction welding is particularly suitable for high-volume production. Induction welders can also be fitted with contact heads, turning them into dual purpose welding systems.


What are the benefits?

Automated induction longitudinal welding is a reliable, high-throughput process. The low power consumption and high efficiency of EFD Induction welding systems reduce costs. Their controllability and repeatability minimize scrap. Our systems are also flexible—automatic load matching ensures full output power across a wide range of tube sizes. And their small footprint make them easy to integrate or retrofit into production lines.


Where is it used?

Induction welding is used in the tube and pipe industry for the longitudinal welding of stainless steel (magnetic and non-magnetic), aluminum, low-carbon and high-strength low-alloy (HSLA) steels and many other conductive materials.

 

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Induction heating for tube and pipe welding
Weldac - High-output, solid-state welders

Weldac is EFD Induction’s family of high-output, solid-state tube and pipe welders. The Weldac family covers a wide range of power sizes; from 50 kW up to 2200 kW. and a frequency range of 60-500 kHz.

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Induction welding

Induction welding is used in the tube and pipe industry for the longitudinal welding of stainless steel (magnetic and non-magnetic), aluminum, low-carbon and high-strength low-alloy (HSLA) steels and many other conductive materials.

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Tube and pipe welding with induction heating

Weldac’s efficiency from input at the rectifier to output at the coil is 85-87%.

Tube and pipe welding with induction heating

Automated induction longitudinal welding is a reliable, high-throughput process

Tube and pipe welding with induction heating

Weldac can be fitted with various induction coils or with quick-lifting contact heads.

Tube and pipe welding with induction heating

Weldac’s automatic load matching ensures full output power across a wide range of tube sizes. There are no ‘unsafe’ operating areas. When a different- sized coil is fitted, Weldac automatically matches to the best setting.

Induction heating - tube and pipe welding

Coil changes take only seconds, with the frequency adjusting automatically to each tube dimension.

Induction heating for tube and pipe welding

The low power consumption and high efficiency of EFD Induction welding systems reduce costs.

Induction heating for tube and pipe welding

The high-speed throughput and reliability of induction welding makes it perfect for the tube and pipe industry.

Tube and pipe welding with induction heating

The first welder in the world with 1000 kW in a single cabinet solution. EFD Induction has always been at the forefront in developing equipment with the best power-to-volume ratio.

Tube and pipe welding with induction heating

Double cabinet welder. The Weldac family covers a wide range of power sizes—from 50 kW up to 2200 kW.

Tube and pipe welding with induction heating

Ferrite for high-frequency tube welding

Tube and pipe welding with induction heating

We offer a full range of consumables including coils, ferrite, impeders and tube scarfing equipment.

Technical Articles

Maximising output in high-frequency tube and pipe welding

The authors evaluate the parameters that influence welder performance and scrap production during changeover in the high-frequency tube and pipe welding process.

Maximizing uptime in high-frequency tube and-pipe welding

This article explains some basic principles of solid-state welder design that are crucial for maintaining operation under various conditions.

New high-frequency converter for induction heating

This paper presents a new high-frequency-converter for induction heating. The converter has a diode rectifier and automatic matching.

Weld setup, variable frequency and heat affected zones

The article investigates the impact that geometrical changes in the weld zone have on weld frequency and the Heat Affected Zone (HAZ).

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