This procedure is used for leak detection where quantitative measurement is impractical. It can be applied to any object on which a pressure differential can be created across the test area; for example to pressurized gas-line joints, piping systems, pressure vessels and storage tanks. Visual Inspection alone has considerable drawbacks; particularly the need for clean and accessible surfaces and is, in many cases, insufficiently sensitive to the detection of minor flaws.
ITCL has embraced the recent developments in vacuum box testing and now uses calibrated pressure relief valves installed as standard. In addition to meeting stringent international standards this improvement has superseded the pregnable calibrated pressure gauge; further safeguarding the technician and box against damage if too large a vacuum is drawn.
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