What is the required burst pressure for pressure gauges compared to the normal operating pressure?

The required burst pressure for pressure gauges is typically set at four times the normal operating pressure. This standard ensures a significant safety margin, protecting both the gauge and the surrounding system from potential failure due to unexpected surges in pressure. By designing gauges to withstand four times the expected maximum pressure, the risk of ruptures or malfunctions is greatly minimized, which is crucial in high-pressure applications like compressed natural gas systems.

This safety standard is rooted in the need for reliable performance under varying operational conditions and potential unforeseen events. The increase provides a buffer that accommodates factors such as temperature variations, pressure fluctuations, and equipment aging, all of which could potentially elevate the operating pressure beyond what is anticipated. Thus, adhering to a fourfold requirement ensures both compliance with safety regulations and the integrity of the measurement system over its operational life.