Is a PFD still needed for long-distance transmission systems?
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I don’t know much about long-distance transmission systems. I have a question: does the storage and transportation specialty still require the preparation of PFDs? For relatively clean fluids, is a pigging system still necessary? Are oil removal filters still installed at the outlets of compressors used in long-distance transmission systems these days? Especially in recent years, compressors have adopted labyrinth seals. Lubricating oil can be used either under pressure or without pressure, but currently, the pressure-free emulsified oil type is more commonly used. It is basically impossible for lubricating oil to enter the fluid being transported by the compressor; or gas seals may be used, and unless there is a failure in the gas seal, it is almost impossible for lubricating oil to get into the fluid being pumped
PFDs are not required for long-distance pipelines; station systems may or may not be prepared depending on the requirements of the project manager. A pigging system is necessary, whether the medium is clean or not.
The storage and transportation field generally does not use PFDs; these days, PID drawings specific to the facility are used instead. But a system diagram can be created for the entire line, which is similar to a PFD diagram. For relatively clean fluids, whether gaseous or liquid, a pigging system is required