Coaxial Pipe Assembly Including a Thermalloy Insulating Sleeve
First Claim
1. An assembly of coaxial pipes of the PiP type, comprising at least two coaxial pipe unit elements each comprising an inner pipe and an outer pipe, with an annular space, preferably filled with an insulating material, and assembled end to end by welding, wherein the assembly includes a sleeve with a hollow tubular wall made of rigid or semirigid material, preferably of plastics material or composite material, surrounding said pipe in register with the welded junction zone between said two coaxial pipe unit elements, said hollow tubular wall of the sleeve comprising an outer casing and an inner casing connected together at their longitudinal ends in leaktight manner, thereby defining an internal volume that is completely filled with a quasi-incompressible thermally insulating material that constitutes an insulating gel.
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Accused Products
Abstract
An assembly of two coaxial pipes of the PiP type, comprising at least two coaxial pipe unit elements each comprising an inner pipe and an outer pipe, defining an annular space, preferably filled with an insulating material, and assembled end to end by welding, including a sleeve with a hollow tubular wall made of rigid or semirigid material, preferably of plastics material or composite material, surrounding said pipe in register with the welded junction zone between said two coaxial pipe unit elements, said hollow tubular wall of the sleeve comprising an outer casing and an inner casing connected together at their longitudinal ends in leaktight manner, thereby defining an internal volume that is completely filled with a quasi-incompressible thermally insulating material.
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Citations
15 Claims
- 1. An assembly of coaxial pipes of the PiP type, comprising at least two coaxial pipe unit elements each comprising an inner pipe and an outer pipe, with an annular space, preferably filled with an insulating material, and assembled end to end by welding, wherein the assembly includes a sleeve with a hollow tubular wall made of rigid or semirigid material, preferably of plastics material or composite material, surrounding said pipe in register with the welded junction zone between said two coaxial pipe unit elements, said hollow tubular wall of the sleeve comprising an outer casing and an inner casing connected together at their longitudinal ends in leaktight manner, thereby defining an internal volume that is completely filled with a quasi-incompressible thermally insulating material that constitutes an insulating gel.
Specification