What range of percentages should test gauges indicate for test pressure?

The correct answer indicates that test gauges should show a pressure range of 90 to 110%. This range is significant because it reflects an acceptable deviation from the set test pressure, ensuring that the gauges are functioning properly and accurately measuring the system's performance under pressure.

When conducting pressure tests, maintaining a range of 90 to 110% of the desired test pressure helps to confirm that the system can handle the necessary operational conditions. This variance accounts for any minor fluctuations or inaccuracies in the measuring equipment while still allowing for stringent safety and compliance standards. Such a range ensures both the integrity of the gauge readings and the safety of the pressure testing process.

Other ranges, such as 80 to 100%, 85 to 115%, or 95 to 105%, either fall outside acceptable practices or might not provide the necessary buffer for pressure testing, potentially leading to inaccurate assessments of the system’s capabilities. Adhering to the 90 to 110% range fosters a higher degree of reliability in evaluating equipment and ultimately enhances safety protocol adherence.