This is an update to a blog that was originally posted on 10/4/16. You can read the original blog here. When reviewing an ammonia refrigeration Piping and Instrumentation Diagram (P&ID) and comparing it to the actual refrigeration system, I am often surprised at how often valves have not been physically labeled to match the P&ID. […]
When reviewing an ammonia refrigeration Piping and Instrumentation Diagram (P&ID) and comparing to the actual refrigeration system, I am often surprised at how often valves have not been physically labeled to match the P&ID. One of the purposes of a P&ID is to aid emergency responders who may be asked to close an isolation valve […]
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