What design aspect must be considered for the inlet connection of pressure gauges to enhance safety?

The inlet connection of pressure gauges serves a critical function in monitoring system pressure, and enhancing safety in this context involves ensuring that the connection can handle the maximum expected pressure without risk of failure. Maximum opening limitation is a key design aspect, as it restricts the amount of pressure that can be transmitted to the gauge beyond a certain threshold, thereby reducing the risk of damage or catastrophic failure when exposed to excessive pressures. This feature is particularly important in systems where pressure fluctuations may occur, and it can prevent gauge ruptures that could lead to hazardous leaks or explosions.

Moreover, having a maximum opening limitation ensures that gauges are appropriately selected for the application, thereby enhancing overall system reliability and safety. Other design aspects like increased size, standardized fittings, and corrosion resistance are also important for different reasons but do not directly address the critical safety concern of managing overpressure situations.