Induction pre-heating
Induction preheating is a process whereby materials or workpieces are heated by induction prior to further processing.
Introduction
The reasons for preheating vary from industry to industry. In the cable and wire industry, cable cores are preheated before insulation extrusion. Steel strips are preheated prior to pickling and zinc coating. Induction preheating also softens metals before bending, and prepares tubes and pipes for welding. Mobile preheating solutions facilitate onsite repairs of bearing assemblies.
- Extremely efficient preheating, resulting in major energy savings
- Short cycle times and continuous automatic matching means a single coil can handle wide production ranges
- Compact and easy to integrate into existing or planned production lines
No dust, no fumes, no noise. An ENRX induction heater gets to grip with 170mm anode stubs.
Image gallery
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Ventac is ideal for preheating before and during welding
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Ventac is a portable air-cooled induction heating system, Here equipped with a quick wrap heating blanket for preheating jobs.
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An operator replaces a bearing that has been heated with an ENRX mobile Minac system
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ENRX systems have been used for hot tap welding on the bed of the North Sea: Photo: Technip Norge AS.
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Specialist coils being tested for the Tampen subsea hot tapping procjet. Photo: Technip Norge AS
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An medium-frequency ENRX Sinac pre-heats seamless offshore pipe prior to coating.
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No dust, no fumes, no noise. An ENRX heater gets to grips with 170 mm anode stubs.
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Induction heating is increasingly used to remove the giant nuts and bolts in power stations’ turbines.
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ENRX designs and builds specialised systems for steel strip and wire and cable pre-heating.
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Minac units are frequently flown to oil platforms to perform repairs and maintenance.
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The “Safe Concordia” accommodation and support platform. A mobile ENRX Minac system was used to pre-heat the weld area during the welding of a patch onto a crane tower.
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An example of induction pre-heating: the pipe is being heated prior to receiving an anti-corrosive coating.
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An induction coil specially designed and built for offshore industry requirements. Once heated by the coil (in red) the pipe can receive an anti-corrosion covering.
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Preheating before welding of baseplate
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Preheating before welding of tower rings
