초록 ▼

Pipes or pipelines insulated and optionally coated on their interior surface or surfaces are described. Pipes or pipelines insulated and optionally coated on their exterior surface or surfaces are also contemplated, The pipes or pipelines may be for submerged service, below the surface of water. The

Pipes or pipelines insulated and optionally coated on their interior surface or surfaces are described. Pipes or pipelines insulated and optionally coated on their exterior surface or surfaces are also contemplated, The pipes or pipelines may be for submerged service, below the surface of water. The insulation chosen may be an epoxy substantially free of phenolics and one or more of glass or ceramics. The coating may be an abrasion resistant coating. Such pipes or pipelines are generally intended for the transport of fluids, which can include natural gas, natural gas liquids, crude oil, refined products, chemicals, combinations thereof, and the like.

대표청구항 ▼

1. 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 20.degree. F. lower in temperature than an initial temperature of said oil, comprising,a) a pipe; b) at least three insulation

1. 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 20.degree. 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 ≥14 or ≥60 per inch, as determined by ASTM C-177-85, wherein the compressive strength of said insulation is ≥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 ≥25 or .ltoreq.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 ≥10 or .ltoreq.15 mils, and said abrasion resistant layer including abrasion resistant particles, an epoxy resin, a hardener, and a diluent.