How is the main steam pressure gauge tested?

The most appropriate method for testing the main steam pressure gauge is by using an inspector's gauge. This is because the inspector's gauge is typically calibrated and certified for accuracy, making it a reliable reference for verifying the readings of the main steam pressure gauge.

When testing the main steam pressure gauge, it's crucial to ensure that the readings are accurate to maintain safe and efficient boiler operation. The inspector's gauge provides a trusted means to compare against the gauge being tested, helping to identify any discrepancies that may indicate calibration issues or faults in the main gauge.

Other methods, such as using a manual gauge, digital display, or reference gauge, can be used in certain situations but may not provide the same level of reliability or certification as an inspector's gauge specifically designed for this purpose. Thus, the use of an inspector's gauge is the standard procedure in industry practices for accurately testing and ensuring the functionality of pressure gauges on high-pressure boilers.