GWR high high level transmitter false activation problem
GWR high high level transmitter false activation problem
(OP)
Hi everyone
I'm working in amine plant for gas sweetening,a fuel gas filter whose HH level transmitter is GWR do frequently activates so cause total shutdown. I'm tracking the possibility of foam potential, any other problem may I investigate ??
thanks in advance
I'm working in amine plant for gas sweetening,a fuel gas filter whose HH level transmitter is GWR do frequently activates so cause total shutdown. I'm tracking the possibility of foam potential, any other problem may I investigate ??
thanks in advance





RE: GWR high high level transmitter false activation problem
RE: GWR high high level transmitter false activation problem
kindly find attached a marked P&ID but let me how on earth this GWR isn't suitable for a fuel gas filter ?
RE: GWR high high level transmitter false activation problem
RE: GWR high high level transmitter false activation problem
Be careful that it is not a true activation: Maybe you are getting a true HH Level. It's often the case the Operation manager or someone higher up is tired of the plant shutting down, and looks for other causes instead of what is truly happening. Then they want to bypass the interlock/safety event and continue running, thinking it's not a true event. I've seen this while working in the Middle East and South America, and 20 years ago in N. America (not so much anymore, but I haven't been in the field much in N. America lately)
If it is a true reading, consider adding a timer to the event, so it has to be HH Level for x seconds before actually tripping. This may help avoid any foaming issues. But again, be careful that the selected time will not interfere with a true safety concern/event.
Also: A word of caution: be careful posting whole P&IDs on any website. Consider cutting and pasting only the desired section of topic. You don't want your company of competitor to know this is out there.
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RE: GWR high high level transmitter false activation problem
Dear Mr controlnovice thank you very much for your advice but let me confirm it's impossible to be an actual signal because we keep monitoring level accumulated there
RE: GWR high high level transmitter false activation problem
It would be better if your Company were to enable automate level draining from these vessels rather than relying on Operations.
Must say the process drains configuration in this PID is not safe - I've never seen plants where the continous process drains and the maintenance drains are all routed to the HP flare header. All process drains are usually routed to a closed drain drum via dedicated collection headers; one header for continous drains and another for maintenance drains. If the continous process drains are known to be clean and non fouling, under exceptional circumstances, it may be okay to have these routed to the HP flare drum through a dedicated continous process drains collection header. Some one in Shell UMP or BapetCo should check the previous concept phase HAZOP sheets. Suspect the problem of frequent LZHH on these vessels is somehow related to the constraints currently being experienced by Operations with this awkward drains - HP flare combination. We see that there are no continous process drain lines on S5132A/B bottoms compartment - all are blinded maintenance drains.
RE: GWR high high level transmitter false activation problem
RE: GWR high high level transmitter false activation problem
RE: GWR high high level transmitter false activation problem
See if there is any difference in the two GWR probes and contact the vendor to discuss further.
A photo of the two different probes and the actual piping set up might show where there is a potential issue to investigate.
Is there any liquid in those vessels for the LT to measure? It could just be that they don't like only being in air for long periods.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.