Internal Coating Sarah Tamilarasan

Chemical costs (Paraffin & Corrosion)

Pigging

Operationally intensive

Internally coat pipe

•  Paraffin Inhibitors •  Modifies Wax Crystals •  Decreases Adherence Rate •  Injected below cloud point, traditionally through capillary strings down the

backside

•  Paraffin Solvents •  Injected above surface •  Decreases force required to strip wax from pipe wall

•  Corrosion Inhibitor •  Essentially forms a film on the interior of pipeline to prevent corrosion

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Hydraulic Efficiency (Reduced surface profile = less friction loses)

Flow Assurance (Reduced surface profile = reduction in mechanical

binding properties)

Flow Assurance (Low Surface Energy = reduction in chemical binding properties)

Bare pipe (delivery 3

days)

Zaplok (3 days)

Internal coating

(2-4weeks)

Coated pipe

(delivery 3 days)

External coating (1

week)

Delivery to site (3 days)

•  Protect the coating •  Metal to metal connection

Zaplok or Sleeves

•  Zaplok – 50-75% lower compared to welding Economics

Welding vs. Zaplok

•  5 days of welding equivalent to 3 days using zaplok

•  Saved approx. 40%-60% in construction time Construction