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Polyethylene coating
protects major crude oil pipeline
Manufacturing News Center - Plastic pipe coating
material to provide corrosion protection for the Turkish oil pipeline.

Borcoat HE3450 bimodal plastic gives excellent weathering
and UV resistance
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October 20, 2004-Jobwerx News-BorcoatT polyethylene
(PE) pipe coating material from Borealis was selected to provide corrosion
protection for the Turkish section of the 1760km Baku-Tbilisi-Ceyhan
pipeline, running from Azerbaijan through Georgia to Turkey, from where
crude oil is shipped to markets worldwide.
Borealis worked with BOTA, the Turkish pipeline operating company and
its contractors Noksel, Umran and Mannesmann, to find a coating solution
that provided the long-term performance demanded by the pipeline. The
pipeline traverses remote and challenging terrain and is subject to
the extremes of weather and climate conditions.
Designed to transport up to one million barrels of crude oil per day
from a cluster of discoveries in the Caspian Sea, referred to collectively
as the Azeri, Chirag, Gunashli field, the 1074km of the 42 inch and
34 inch steel pipes that cross Turkey are protected from corrosion by
Borcoat HE3450 bimodal PE, together with Borcoat ME0420 grafted PE adhesive
and epoxy primer, which provide a high-performance three-layer system.
The Borcoat system helps customers like BOTA? achieve a lower overall
lifetime project cost by allowing high-speed laying operations, reducing
pipeline damage and the need for maintenance, while giving high coating
output and optimised coating thickness.
"As a pipe coating material, PE has long been recognised as one of the
best technical and economical solutions for protecting steel pipes from
long-term corrosion," says Barry Turner, Application Marketing Manager,
Borealis Pipe. "Our Borcoat PE is made with our Borstar® process technology,
which provides a plastic with especially good melt strength and extrudability.
Borstar enhances mechanical and heat deformation properties and environmental
stress crack resistance, and so optimises the protection of the very
large pipeline."
Borcoat HE3450 bimodal plastic contains consistently dispersed fine
particles of carbon black that gives excellent weathering and UV resistance.
Together with Borcoat ME0420 or Borcoat M0433 and a compatible powder
epoxy the coating is particularly suitable where a pipeline must cope
with severe laying conditions and either low or high ambient temperatures.
Borealis has supplied 10,000 metric tonnes of Borcoat HE3450 and Borcoat
ME0420 for the Baku-Tbilisi-Ceyhan pipeline which is due to become fully
operational by early 2005.
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