Patent ID: 8763647

Claim:
A composite tube comprising: a substantially fluid impervious layer, wherein the substantially fluid impervious layer comprises a surface having grooves formed thereon to facilitate a bond between the substantially fluid impervious layer and at least one other layer of the composite tube, wherein the bond is adapted to restrict longitudinal movement between the substantially fluid impervious layer and the at least one other layer; a composite layer of fibers embedded in a first matrix, wherein the composite layer is formed of a first set of fibers embedded in the matrix and at least 80%, by fiber volume, of the fibers of the first set of fibers are helically oriented relative to a longitudinal axis of the composite tube at an angle of between ±30° and ±70°, and a thermal insulation layer formed at least partially of a material different from the first matrix selected to maintain a fluid carried within the composite tube within a predetermined temperature range, wherein the thermal insulation layer is formed at least partially of a foamed thermoset material or a foamed thermoplastic material.