The range of a pressure gauge should be at least how many times the safety valve setting?

The appropriate range for a pressure gauge in relation to the safety valve setting is established to ensure accurate readings and proper functioning of the safety system. A range of at least 1.5 times the safety valve setting is necessary to avoid potentially inaccurate measurements that could occur if the gauge is too close to the valve's operating range. This additional range allows for fluctuations in pressure and provides a buffer that helps prevent unnecessary operation of the safety valve under normal conditions.

Additionally, if the pressure gauge is set too close to the safety valve setting, it may give false readings causing an increased risk of over-pressure situations. The 1.5 times factor is a common engineering practice that enhances safety and reliability, ensuring that the equipment can handle variations in pressure while still providing a true reading of the system's state.

Selecting a gauge range that is proportionate to the safety valve setting is important for effective monitoring and control in steam systems, thus maintaining safety and operational integrity.