Boiler Drum Pressure Measurement

Good morning.,

What is the best location to measure the boiler drum pressure in an industrial superheated steam boiler?

a.-one side of the drum (steam space)

b.-steam header from the drum after the demisters or separators (before the superheater seccion).

c.-Other one.

The Boiler Code requires steam drum pressure. The other locations may be useful in your plant setup, but steam drum pressure is mandatory.