Pipeline limit dent detector

Details Pipeline limit dent detector Pipeline limit dent detector

1977-05-04

1978-05-30

Queisser, Richard C.

Measuring and testing

Miscellaneous

33178E, G01N 1908

Patent

active

040916782

ABSTRACT:
A device for detecting dents or out of round conditions of a buried pipeline, intended to be towed by a pipeline pig, comprises two concentric annular rings, the outer ring sized to accurately fit the inner diameter of the pipeline to be inspected and having electrical contacts on its inner surface, the inner ring is supported concentric with the outer ring by chains, cables or the like and has electrical contacts on its outer surface to complete an electric circuit when the outer ring is deformed radially inwardly as it passes by a dent.

REFERENCES:
patent: 2607128 (1952-08-01), Newhall
patent: 3303572 (1967-02-01), Vreeland, Jr.

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