Operational Data

Environmental

RPR induces heat (energy) only where and when it is needed. As induction heating by itself does not produce harmful emissions, exhaust gases, smoke, loud noise or waste heat, there is no negative impact on the surrounding environment.

Power Consumption

RPR uses only 25% of the energy per surface unit required for conventional methods:

Power consumption RPR abrasive blasting / water jetting
kWh per m2 0.75 3.00
abrasive blasting / water jetting 0.07 0.28

The energy-efficient process converts over 90% of the energy expended into useful heat. This represents a much higher efficiency rating than is possible with conventional surface preparation methods. The results are reduced costs and time savings. Stand-by heat loss is reduced to a minimum, since the heat is only “active” while the system is actually working, i.e. performing its task.

Localised Heating

With the induction heat penetrating only 0.3-0.5 mm into the substrate, paint and rust will be disbonded on the treated side of the object, while any coating on the reverse side will not be damaged or affected at all.

heating_process

Paint, rust, mill scale etc. come loose and can easily be peeled off or removed otherwise with scraper tools or similar equipment.

Oil and grease residues present on the surface will also be removed by RPR induction heating.

A general recommendation is that steel objects to be RPR induction-treated should have a minimum thickness of 5 mm (slightly less than ¼”). RPR has been tested on steel plates of 3 mm thickness (just under ⅛”). The coatings removal was a success, but RPR recommends that operators themselves run trial tests on all steel less than 5mm before full coatings removal jobs.

Removal Rates Per Hour

At an energy output between 10 and 50 kW, RPR generally achieves paint and rust removal rates of 20-200 m2 per hour (215-2150 ft2). Productivity depends on the type and condition of surface to be treated as well as the type, condition and thickness of coating to be removed, as well as other variables. The following results were achieved in the field with fairly “difficult to remove” coatings, thickness range 400 to 500 microns (16-20 mils) and can be regarded as realistic:

Energy output Removal rate per hour
10 kW 20 m2 / 215 ft2
17 kW 35 m2 / 377 ft2
25 kW 40 m2 / 430 ft2
50 kW 70 m2 / 753 ft2

With coating thicknesses of 300-500 microns (12-20 mils), RPR will usually show removal rates of between 50 and 200 m2 per hour (540-2150 ft2) at full energy output (50 kW