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What letter is used to represent intermittent operation on the first page of the drawing?

2015-07-27View Original

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Guys, on the first page of the drawings, normal no-flow conditions are indicated by NNF. What letter code is generally used to represent intermittent operation? Seeking advice
Reply #22015-07-27
I’m not sure if it’s correct; I remember it being US
Reply #32015-07-27
What is the abbreviation for this, sir?
Reply #42015-07-28
When referring specifically to intermittent operation, it is called Batch Operation; abbreviated as BO. I’m not sure if this is indeed the case
Reply #52015-07-29
I also haven’t found the remaining 1234567890
Reply #62016-03-12
Under normal conditions, there is no flow; it refers to the pipelines used for starting up and shutting down the system
Reply #72016-03-12
no normal flow
Reply #82016-03-13
It shouldn’t be; NNF is mainly about starting and stopping lines
Reply #92016-03-14
It seems there is no abbreviation for intermittent operation; a flowchart doesn’t need to indicate whether the process is intermittent or not. That information should be included in the process description
Reply #102016-03-14
I don’t know what you want to ask Is it PFD or PID?

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