Hello to everyone, I have a question related to installation of level switches on existing vessel. Client likes to add pump dry protection from low-low level in suction vessel. The system is existing. They also want to have 2 out of three voting on this level switch which means installation of 3 independent transmitters. The question is if it is allowed to have these transmitters installed on common standpipe on vessel to avoid drilling 3 sets of nozzles for each transmitter. If the standpipe is allowed is there any rule for minimum size of standpipe and standpipe connection to vessel if the connection to individual transmitter is 2"?
Thanks.
Edited by paruzekk, 01 August 2018 - 04:12 AM.