ropumar
Mechanical
- Mar 2, 2015
- 8

Hi,
I believe that outlet pipe should have design pressure same as the boiler design pressure and have been defending that at my work.
However, people at my work argument that since outlet pipe discharge to atmosphere, piping design pressure can be low(5K Class), since pressure over all the length of outlet will be {atmosphere + the pressure loss trough pipe}. I believe this is wrong, pressure at pipe will be closer to operation of boiler when PSV discharge happens. If I am wrong, please enlighten me.
What is the right answer? Can a 5K CLASS pipe be used for discharge of a 16barg Boiler as picture shows?