Safety interlock for pipeline pig launcher and receiver

Details Safety interlock for pipeline pig launcher and receiver Safety interlock for pipeline pig launcher and receiver

1976-05-18

1979-01-23

Fisher, Richard V.

Cleaning and liquid contact with solids

Processes

Combined

1510406A, 134 8, 134 22R, 137268, B08B 704

Patent

active

041359496

ABSTRACT:
A method and apparatus is provided for interlocking the controls on flow control valve process lines entering or leaving a pipeline pig launcher or receiver to prevent opening of the launcher-receiver closure when there is pressure in the launcher-receiver vessel and to prevent inadvertent admission of flow into the vessel while the closure is not in place.

REFERENCES:
patent: 2589170 (1952-03-01), Ver Nooy
patent: 2965125 (1960-12-01), Osborne et al.
patent: 3266076 (1966-08-01), Surber
patent: 3384512 (1968-05-01), Frederick et al.
patent: 3562014 (1971-02-01), Childers et al.
patent: 3611467 (1971-10-01), Hinz
patent: 3664356 (1972-05-01), Grove et al.
patent: 3676091 (1972-07-01), Fraser et al.
patent: 3682186 (1972-08-01), Howe
patent: 3746027 (1973-07-01), Elliott
patent: 3953157 (1960-09-01), Osborne et al.

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