Application methods / Coating rotoling

Coating rotoling

It is a technology for bonding thermoplastic polymers inside tanks, vessels, pipes, fittings and other types of process equipment.

The resulting polymer layer adds corrosion protection and resistance to chemicals.

Rotolining is applied by means of a rotational process. Workers place the granular powder resin inside the container or similar process equipment; they seal all its openings and then mount the container inside an oven.

The oven rotates on two perpendicular axes at low speed, giving the resin time to melt and spread evenly over all internal surfaces of the equipment. The rotation of the oven causes the polymer to adapt to the internal shape of the vessel.

The processed equipment is cooled slowly to prevent shrinkage and deformation. After cooling, the polymer provides a continuous, permanently bonded coating.

Depending on the polymer used and the service application of the equipment, the thickness of a rotational coating varies from 0.23 cm to 2.5 cm.

Such a thick coating provides greater protection against corrosion and abrasion, maximising the life of the equipment.

The advantages of rotolining solutions are manifold:

  • Since the cladding is monolithic and seamless, there are no weld joints acting as potential breaking points

  • The structural integrity of the equipment is maintained and even improved

  • Rotolining makes flanges easy to seal reducing the risk of leakage

  • No other coating technique offers such a wide range of materials, allowing the material to be matched to its application

  • The fully bonded coating can withstand the vacuum and eliminate the annular space for permeation to collect and condense

  • Operating temperatures are permitted across the entire temperature range of the material chosen for the coating

  • Rotolining is suitable for a wide range of metal substrates

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