Possibilities and Limitations of Leak Testing Using Pressure Decay Methods

This technical report discusses the possibilities and limitations of leak testing using pressure decay methods, particularly in the context of vacuum furnaces. It explains how these methods operate, detailing the parameters that influence the testing process, such as leakage rate, volume, test time, and pressure difference. The report outlines the fundamental procedures for conducting pressure increase and decrease tests, including the necessary calculations to determine leakage rates. It also addresses typical challenges encountered when testing vacuum furnaces and provides practical tips for effective testing. Factors affecting test accuracy, such as measuring device resolution and environmental conditions, are examined. Additionally, the report highlights the influence of container volume and temperature on pressure decay, emphasizing the importance of these factors in achieving reliable test results. The interpretation of time-pressure curves obtained during testing is also discussed, offering insights into potential actions based on observed pressure changes.