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External shot blasting line
  • The bare pipes are received at the incoming racks and are then pre-heated and shot- blasted to specific surface profiles.
  • As each pipe is shot blasted, the blasted profile and depth of anchor pattern is tested to ensure quality.
  • Pipes which are rejected after shot blasting are re worked and shot blasted again before transferred to coating line.

External coating line
  • The shot blasted pipes are acid washed and chromate treated before entering the induction heater/Gas Furnace where thePipe is heated to a temperature recommended by the epoxy manufactures.
  • Epoxy powder is sprayed onto the pipes in the Epoxy Booth.
  • If three layer coating is required co extruded layers of Co Polymer Adhesive and Polyethylene/Polypropylene are wrapped on the pipe surface.
  • The pipes are subsequently cooled at the Quench station and 100% inspected for holiday. Before final inspection coating is removed from the pipe ends according to specifications.
  • Final Inspection and marking of coated pipes are carried out as required.

Internal shot blasting line
  • At the internal shot blasting station bare pipes are shot blasted to achieve desired surface profile.
  • Grits/shots in the pipes are then cleaned through tilting or by blowing air through the pipe.

Inernal coating line
  • Internally shot blasted Pipes are transferred to the Coating line.
  • Epoxy Paint is pre heated to the temperature recommended by epoxy suppliers.
  • The coating is applied through an automatic airless spray machine to attain the uniform coating thickness.
  • Once coating is completed the pipe is left for curing and is later 100% inspected for holiday.
  • Final inspection of internally coated pipe is carried out.

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