Patent ID: 6397895
Filing Date: 2002-06-04
Classification: B05D,C09D,F16L

Abstract:
A submerged pipeline insulated on its interior for retaining all or part of the naturally occurring temperature of oil, where the pipeline is submerged in water at least 20Â° F. lower in temperature than an initial temperature of said oil, comprising,a) a pipe; b) at least three insulation layers formed on an inside circumference of a pipe portion of said pipeline, said insulation layers having an R value of one of &gE;14 or &gE;60 per inch, as determined by ASTM C-177-85, wherein the compressive strength of said insulation is &gE;3500 psi, as determined by ASTM D-1621, and wherein said insulation layers are present on said inside circumference of said pipe at a total thickness of one of &gE;25 or &lE;60 mils, said insulation layers including an epoxy, substantially free of phenolics and said insulation layers including one of ceramics, glass and combinations thereof, said layers being one of the same thickness or different thickness, c) optionally at least one abrasion resistant layer formed on the inside circumference of said insulation, said abrasion resistant layer, if present, is present at one of &gE;10 or &lE;15 mils, and said abrasion resistant layer including abrasion resistant particles, an epoxy resin, a hardener, and a diluent.