Internal anti corrosion / flow-efficiency lining pipe coating plants

Flow-efficiency lining

The transmission of dry gas, sour gas, potable water, sewage, or oil often requires the application of either a flow-efficiency lining or an anti-corrosion lining inside the pipe. Typical of internal lining plants is that pipes are processed in a one-by-one sequence in separate stations, of which the abrasive (grit/shot) blasting and lining station are the core of the process.

Abrasive (grit/shot) blasting and lining

Depending on the pipe diameter, grit blasting is accomplished either using the air blast method or by means of a blast turbine. The lining is accomplished by means of airless liquid spray coats (cold or hot applied) or by Fusion Bonded Epoxy (FBE) powder.

Flexible in setup

The design of Selmers’ lining plants is extremely flexible in setup and allows for a variety of equipment configurations, depending on the type of operation, lining specifications, ambient temperatures, and available space. As in the internal lining process (as compared with the external coating process), each pipe is processed separately – special attention must be given to efficient pipe handling and positioning of pipe enclosure cabins. This is achieved by integrating or making available a high degree of automation, as well as by using pipe handling devices such as transport indexers, pipe push conveyors, walking beams, and so on.


In addition to the core equipment (blasting and lining) the following stations can be added to the plant:

  • internal wash
  • preheating
  • pipe-end tape masking / de-masking
  • flush out stations
  • paint curing ovens (for cold areas and/or high production plants)
  • holiday detection stations
  • inspection stations