Pipeline pigs

Details Pipeline pigs Pipeline pigs

1976-04-06

1977-11-08

Artis, Henry K.

Pipes and tubular conduits

Repairing

F16L 5512, G01R 1900

Patent

active

040570819

ABSTRACT:
A magnetically detectable attachment for a pipeline pig comprises a wheel formed from two discs of magnetic material which serve as pole pieces for a permanent magnet mounted therebetween. The wheel is arranged, in use, to run along the top of the inside of the pipeline so as to magnetize a narrow longitudinal strip of the pipeline wall as the pig passes therealong.

REFERENCES:
patent: 2894539 (1959-07-01), Cook et al.
patent: 3285290 (1959-11-01), Morrison
patent: 3495626 (1970-02-01), Nagel
patent: 3503424 (1970-03-01), Sawyer
patent: 3796233 (1974-03-01), Lacey

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