During the hydrostatic test, how should the pressure gauge at each standpipe be treated?

During a hydrostatic test, it is essential to closely observe and record the pressure gauge readings at each standpipe. This is important because the gauge provides critical data regarding the integrity of the piping system under pressure. By monitoring the pressure, technicians can determine if there are any leaks or weaknesses in the system. Documenting these readings also ensures compliance with safety standards and regulatory requirements, as it provides a record of the system's performance during testing.

Ignoring the pressure gauge would overlook vital information needed to assess system integrity. Replacing the gauge would be unnecessary if it is functioning correctly during the test, and recalibrating it may not be required unless there are indications of inaccuracy. Therefore, observing and recording the pressure readings is the most prudent and necessary course of action during a hydrostatic test.