Expanding bolts with induction uses precise and localised heat, and is faster and safer than resistance or flame heating.

Bolt heating

The use of induction heating for bolt expansion is the proven time and labour-saving alternative to inefficient flame and resistance heating.

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Induction heating explained

What is induction bolt heating?

Induction bolt heating uses electromagnetic induction to rapidly and precisely heat bolts for controlled expansion. This process simplifies bolt removal and tightening in high-pressure applications, such as turbines, ensuring safe and efficient maintenance.

Brochure: Induction heating applications

Expanding bolts with induction is the proven timeand labor-saving alternative to inefficient flame and resistance heating.

What are the benefits?

Outperforms traditional flame and resistance methods by offering faster, more precise, and damage-free heating.
The localized heat prevents damage to bolt threads and eliminates the risk of rods melting inside bolts.
Additionally, it enhances process control, energy efficiency, and operator safety.

Induction bolt-heating-on-tower-foundation

Where can it be used?

Induction bolt heating is widely used in power plants, offshore platforms, and heavy industrial machinery maintenance. It plays a key role in high-pressure turbine applications, where quick and safe bolt expansion is critical for minimizing downtime.

What equipment is available?

The bolt expansion solution is built around a small yet powerful mobile Minac converter and specially designed inductor coils.. The Minac Twin version enables simultaneous heating of two bolts, increasing efficiency. Our systems feature quick-release coils, digital controls, and preset heating parameters for consistent performance.

Image gallery

Bolt heating on tower foundation
The use of induction heating for bolt expansion in high-pressure turbines is a powerful business tool.
Induction heating is a time and labour-saving alternative to inefficient flame and resistance heating for oil and gas processing plants, chemical plants and power stations.
An operator inserts a specially designed induction coil into the bolt.
The end result of a quick and safe induction bolt heating: An exposed turbine is ready for maintenance.