soap bubble test

soap bubble test

[′sōp ¦bəb·əl ‚test]
(engineering)
A leak test in which a soap solution is applied to the surface of the vessel under internal pressure test; soap bubbles form if the tracer gas leaks from the vessel.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

soap bubble test

A basic test to confirm gas leakage in any kind of system in which gas is held under pressure. A soap solution is brushed over the areas of probable leakage. Any leak is confirmed by bubbles in the soap film.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved