Why is the safety valve on the outlet pipeline after ammonia washing in the ammonia washing tower located at the bottom of the pipeline?
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Normally, it leads out from the top; why does this one lead out from the bottom? Could you explain that?
It shouldn’t be possible to tell from the PID diagram whether it’s the bottom or the top of the outlet pipe, right? And when the equipment is installed, the safety valve should also be placed in the gas phase space
The poster had better first check whether the pipelines on site are connected at the lower part
Whether it is for drainage and anti-freezing purposes needs to be discussed with the designer!
Since there is no special indication on the PID, it only indicates the process route; on-site construction is carried out according to the on-site pipe layout diagram. If the person asking wants to know for sure, they can check the pipe layout diagram
PID does not represent the pipe layout.