Dry the surface.

Dry the surface.

Remove all sharp parts and burrs.

The insulated pipe should be carefully cleaned of dirt and old coating. There should be no traces of oils and soot on the surface, for this, degreasing can be carried out. Pipe cleansing can be done manually, for this you need to use metal brushes, scrapers, and so on. After the surface is thoroughly cleaned, it must be well dried. Prior to abrasive cleaning, the surface must be sanded and smooth all the sharp parts and burrs.