| 摘要 |
A system (10) for leak-testing an article (20) required to be fluid leak-tight in use at a fluid contacting region (38) thereof, to determine fluid leakage through the article to a non-fluid contacting region (40) of the article. The system includes a leak-testing fluid held in confinement by the fluid-contacting region of the article, a vacuum assembly (46, 66) arranged for establishing a vacuum environment at the non-fluid-contacting region of the article, and a leak detector (76) arranged to detect presence or absence of the leak-testing fluid in the vacuum environment, to determine fluid leakage through the article. The system enables leak sensitivity significantly below 1 x 10^-6 standard atmospheric-cc/sec to be achieved, e.g., sensitivity in a range of from 1 x 10^-7 to 1 x 10^-11 standard atmospheric-cc/sec, and is useful for quality assurance testing of vessels (118) intended to carry hazardous gases.
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