The issue of determining the hydrostatic test pressure for power plant boilers.
Thread Content
Hydraulic test for power station boilers: The working pressure at the inlet of the economizer is 1.1 times higher than that at the outlet of the superheater; according to the regulations on boiler safety inspection, the pressure for the hydraulic test of boilers is set at 1.1 times the working pressure at the inlet of the economizer. It is not clear now whether this pressure should be applied at the inlet of the economizer or at the outlet of the superheater.
Taking 1.1 times the value at the economizer inlet, of course, measurement is taken at the economizer inlet； It is of course measured at the superheater outlet, where the steam exits the superheater. A water pressure of 1.1 times the inlet pressure is applied at the economizer inlet; however, the pressure measured at the superheater outlet will certainly not be 1.1 times that of the economizer inlet, due to frictional losses and elevation pressure differences during flow. The water pressure at the superheater outlet only needs to not exceed the maximum allowable hydrostatic test pressure determined by the strength calculations.