High temperature resistant insulation for pipe

An insulated high-temperature transport conduit for use in offshore, deep water environments, the conduit comprising:

• (a) a continuous steel pipe made up of one or more pipe sections, wherein the steel pipe has an outer surface and an inner surface;
• and
• (b) a first layer of thermal insulation provided over the outer surface of the steel pipe, wherein the first layer of thermal insulation is comprised of a high temperature resistant thermoplastic having low thermal conductivity, high thermal softening point, high compressive strength and high compressive creep resistance;
• wherein the first thermal insulation layer is a blown foam or a syntactic foam having a degree of foaming of up to about 50%.

An insulated high-temperature transport conduit for use in offshore, deep water environments, the conduit comprising:

• (a) a continuous steel pipe made up of one or more pipe sections, wherein the steel pipe has an outer surface and an inner surface;
• and
• (b) a first layer of thermal insulation provided over the outer surface of the steel pipe, wherein the first layer of thermal insulation is comprised of a high temperature resistant thermoplastic having low thermal conductivity, high thermal softening point, high compressive strength and high compressive creep resistance;
• further comprising a corrosion protection coating directly applied to the outer surface of the steel pipe and bonded thereto, and underlying the first thermal insulation layer;
• wherein the first thermal insulation layer is in direct contact with the corrosion protection coating and directly adhered thereto, the corrosion protection coating having been treated by plasma or corona discharge prior to application of the first thermal insulation layer.

An insulated high-temperature transport conduit for use in offshore, deep water environments, the conduit comprising:

• (a) a continuous steel pipe made up of one or more pipe sections, wherein the steel pipe has an outer surface and an inner surface;
• and
• (b) a first layer of thermal insulation provided over the outer surface of the steel pipe, wherein the first layer of thermal insulation is comprised of a high temperature resistant thermoplastic having low thermal conductivity, high thermal softening point, high compressive strength and high compressive creep resistance;
• further comprising a corrosion protection coating directly applied to the outer surface of the steel pipe and bonded thereto, and underlying the first thermal insulation layer;
• wherein the corrosion protection coating comprises a multi-layer corrosion protection system applied to the outer surface of the steel pipe and underlying the first thermal insulation layer, wherein the multi-layer corrosion protection system comprises:
• (a) a layer of said cured epoxy or modified epoxy directly applied to the outer surface of the steel pipe and bonded thereto;
• and
• (b) a first adhesive layer applied directly to the corrosion protection layer and underlying the first thermal insulation layer.

An insulated high-temperature transport conduit for use in offshore, deep water environments, the conduit comprising:

• (a) a continuous steel pipe made up of one or more pipe sections, wherein the steel pipe has an outer surface and an inner surface;
• and
• (b) a first layer of thermal insulation provided over the outer surface of the steel pipe, wherein the first layer of thermal insulation is comprised of a high temperature resistant thermoplastic having low thermal conductivity, high thermal softening point, high compressive strength and high compressive creep resistance;
• further comprising an outer protective topcoat applied over the first thermal insulation layer and forming an outer surface of the insulated transport conduit, wherein the outer protective topcoat is comprised of an unfoamed polymeric material;
• wherein the first thermal insulation layer is in direct contact with the outer protective topcoat and directly adhered thereto, the first thermal insulation layer having been treated by plasma or corona discharge prior to application of the outer protective topcoat.

An insulated high-temperature transport conduit for use in offshore, deep water environments, the conduit comprising:

• (a) a continuous steel pipe made up of one or more pipe sections, wherein the steel pipe has an outer surface and an inner surface;
• and
• (b) a first layer of thermal insulation provided over the outer surface of the steel pipe, wherein the first layer of thermal insulation is comprised of a high temperature resistant thermoplastic having low thermal conductivity, high thermal softening point, high compressive strength and high compressive creep resistance;
• further comprising a second thermal insulation layer comprised of a thermoplastic in the form of a solid, a blown foam or a syntactic foam;
• wherein the first and second thermal insulation layers are foamed to different degrees.

An insulated high-temperature transport conduit for use in offshore, deep water environments, the conduit comprising:

• (a) a continuous steel pipe made up of one or more pipe sections, wherein the steel pipe has an outer surface and an inner surface;
• and
• (b) a first layer of thermal insulation provided over the outer surface of the steel pipe, wherein the first layer of thermal insulation is comprised of a high temperature resistant thermoplastic having low thermal conductivity, high thermal softening point, high compressive strength and high compressive creep resistance;
• further comprising a second thermal insulation layer comprised of a thermoplastic in the form of a solid, a blown foam or a syntactic foam;
• wherein the first thermal insulation layer underlies the second thermal insulation layer, and is in direct contact with the second thermal insulation layer and directly adhered thereto, the first thermal insulation layer having been treated by plasma or corona discharge prior to application of the second thermal insulation layer.

An insulated high-temperature transport conduit for use in offshore, deep water environments, the conduit comprising:

• (a) a continuous steel pipe made up of one or more pipe sections, wherein the steel pipe has an outer surface and an inner surface;
• and
• (b) a first layer of thermal insulation provided over the outer surface of the steel pipe, wherein the first layer of thermal insulation is comprised of a high temperature resistant thermoplastic having low thermal conductivity, high thermal softening point, high compressive strength and high compressive creep resistance;
• further comprising a second thermal insulation layer comprised of a thermoplastic in the form of a solid, a blown foam or a syntactic foam;
• wherein the first and second thermal insulation layers are separated by a layer of unfoamed polymeric material.

An insulated high-temperature transport conduit for use in offshore, deep water environments, the conduit comprising:

• (a) a continuous steel pipe made up of one or more pipe sections, wherein the steel pipe has an outer surface and an inner surface;
• and
• (b) a first layer of thermal insulation provided over the outer surface of the steel pipe, wherein the first layer of thermal insulation is comprised of a high temperature resistant thermoplastic having low thermal conductivity, high thermal softening point, high compressive strength and high compressive creep resistance;
• further comprising a moulded pipe joint insulation system directly bonded to both the corrosion protection coating system and first thermal insulation layer at a joint connecting two pipe sections.