Joint for plastic lined metal piping with reduced diameter pipe

Details Joint for plastic lined metal piping with reduced diameter pipe Joint for plastic lined metal piping with reduced diameter pipe

1986-06-02

1987-02-17

Callaghan, Thomas F.

Pipe joints or couplings

With casing, lining or protector

Lined

285412, F16L 914, F16L 2300

Patent

active

046434577

ABSTRACT:
A seal load ring having parallel radial faces is installed between the flared gasket portion of the piping plastic liner and the lapped end of a section of metal piping. The plastic engaging face of the ring is provided with a plurality of concentric circular grooves to resist plastic cold flow. The pipe lap has a significantly lesser outside diameter than the outside diameter of the seal load ring, only sufficient to support the joint connecting forces, thereby permitting easier and more economical fabrication of the pipe lap and permitting the use of less ductile less expensive pipe.

REFERENCES:
patent: 2356047 (1944-08-01), Geisinger et al.
patent: 2998984 (1961-09-01), Gressel
patent: 3702199 (1972-11-01), Brooks et al.
patent: 4288105 (1981-09-01), Press
patent: 4313625 (1982-02-01), West
patent: 4494776 (1985-01-01), Press

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