Composite pipe having an integral bell end

Details Composite pipe having an integral bell end Composite pipe having an integral bell end

1978-02-21

1980-12-23

Phillips, Charles E.

Pipes and tubular conduits

Combined

With end structure

138137, 138174, F16L 1102

Patent

active

042404703

ABSTRACT:
A composite reinforced plastic pipe having an integral bell end and method for making the same are disclosed wherein the composite pipe has a resin impregnated surfacing veil liner, a first resin impregnated continuous fiberglass strand reinforced layer coaxial along the inner liner, a sand-resin core layer formed along the cylindrical portion of the pipe but not on the bell end, a resin impregnated surfacing mat formed coaxially along the length of the exposed first fiberglass strand reinforced layer on the bell end and along the core layer, and an outer resin reinforced roving layer formed coaxially along the full length of the pipe, the composite pipe being cured to form a high strength pipe having uniform radial stiffness and improved resistance to water migration.

REFERENCES:
patent: Re29394 (1977-09-01), Swanson et al.
patent: 3362717 (1968-01-01), Bram
patent: 3406724 (1968-10-01), Carlstrom et al.
patent: 3467764 (1969-09-01), Knapp
patent: 3532132 (1970-10-01), Rubenstein
patent: 3607511 (1971-09-01), Grosh
patent: 3871409 (1975-03-01), Gilbu
patent: 3884269 (1975-05-01), Schetty et al.
patent: 3953629 (1976-04-01), Wesch
patent: 4114657 (1978-09-01), Langenfeld

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