Apparatus and method for testing pipes for leaks, and seals ther

Details Apparatus and method for testing pipes for leaks, and seals ther Apparatus and method for testing pipes for leaks, and seals ther

1975-12-12

1978-07-11

Queisser, Richard C.

Measuring and testing

With fluid pressure

Leakage

73 491, 277 2, G01M 328, F17D 304

Patent

active

040994058

ABSTRACT:
The present apparatus, method and seals relate to an external tester for defining a sealed chamber around a pipe joint, such chamber then being filled with fluid under very high pressure. After introduction of fluid into the test chamber is terminated, a determination is made as to whether or not the pressure is reducing --any such reduction indicating that a leak is present in the pipe joint. To define a test chamber which is perfectly sealed so that fluid will not escape otherwise than through a leak in the pipe joint, there are provided longitudinal sealing elements and arcuate seal segments of special construction. The longitudinal and arcuate sealing elements interrelate with each other and with extrusion-prevention and index elements in such manner that no cracks remain through which the fluid may escape.
The longitudinal and arcuate sealing elements have molded therein compression and mounting elements which provide initial sealing compression even prior to the time that the casing is closed about the pipe to be tested. Then, when the casing is closed there is augmented sealing compression created by the closing, following which injection of the fluid into the test chamber creates final sealing compression to complete sealing of the test chamber to such an extent such that tens of thousands of psi of water may be introduced without leaking.

REFERENCES:
patent: 3975945 (1976-08-01), Hauk et al.

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