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- An intermediate polyethylene sheath separates the steel carcass from the crosswound armors and provides an
extra leak proof layer.
- Double crosswound armors resist axial and torsional loads.
- The polyethylene outer sheath protects the pipe from external corrosion and ensures binding of the underlying
armors.
- The Rilsan outer jacket provides an extra protection during the bottom tow of the flexible pipe on the seafloor.
See Figures II-1 and II-2.
Coflexip pipe is manufactured in long continuous lengths which are spooled on storage/installation reels. The
connections are mounted at both ends of each section, and the entire lengths are subsequently pressure tested in the
factory. The end connections have reached such a high degree of reliability that they retain all the characteristics of the
pipe with a substantial safety factor. The end connections also undergo a Ni-Kanigen corrosion protection treatment.
This treatment consists in anchoring, by a non-electrolytic process, a penetrating layer of nickel into the steel.
The total length of the Drinking Water Discharge line is 2,500 feet, made in one continuous section. Each end is
equipped with an ANSI B 16.5 series 150, raised face flange.
See Figures 11-3 and 11-4.
