Composite pipe

Details Composite pipe Composite pipe

1992-05-05

1995-05-02

Scherbel, David A.

Pipes and tubular conduits

Repairing

Patches

138111, 138114, 138103, F16L 1108

Patent

active

054110602

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.

REFERENCES:
patent: 3823565 (1974-07-01), Takada
patent: 4009063 (1977-02-01), Wood
patent: 4334943 (1982-06-01), Zenbayashi
patent: 4350548 (1982-09-01), Zenbayashi et al.
patent: 4368091 (1983-01-01), Ontsuga et al.
patent: 4786345 (1988-11-01), Wood
patent: 4836715 (1989-06-01), Wood
patent: 4883557 (1989-11-01), Morinaga et al.
patent: 5010440 (1991-04-01), Endo
patent: 5172730 (1992-12-01), Driver

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