Composite pipe
OwnerBrian Chandlerinventor
Life of this patent
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Abstract
A composite pipe suitable for advanced gas distribution is formed of a first elastomeric resin impregnated outer felt tube reinforced longitudinally, and a second inner felt tube impregnated with an uncured resin which is more rigid than the elastomeric resin and coated on at least the inside surface with a styrene resistant gas impermeable layer and reinforced in the longitudinal and radial directions. The inner tube has a nominal outside diameter greater than the nominal inside diameter of the outer tube. After installation the inner tube is pressurized to expand the outer tube and the uncured resin is cured activating the heat sensitive to bond the two tubes together and cure the pipe with the outer tube in the expanded condition.
Claims9
A pipe which can be fabricated in sufficiently long lengths suitable for use in advanced gas distribution systems and sufficiently flexible for storage prior to installation and curing, comprising:
- a first outer fibrous carrier tube of a first dimension impregnated with a cured impact resistant flexible elastomeric resin, the fibrous carrier reinforced with first longitudinal reinforcing means for limiting longitudinal stretch of the pipe;
- a second inner fibrous carder tube of a second dimension impregnated with an uncured elastomeric resin which is more rigid, when cured, than the resin in the first tube;
- the second tube having a nominal outer diameter greater than the nominal inner diameter of the outer tube, the second tube positioned within the first tube;
- the second tube reinforced in the longitudinal and radial directions with second reinforcing means for limiting elongation and radial expansion of the second tube, the second tube coated on at least the inside surface away from the outer tube with a gas impermeable and styrene resistant synthetic resin layer.
Dependencies are inferred from the claim text.