Pressure maintenance in the intake pipeline of combustible gas compressors
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Paragraph 7.2.9 of the Petrochemical Regulations stipulates that the suction pipeline of combustible gas compressors shall have measures to prevent negative pressure from occurring; does this measure refer to something similar to a nitrogen seal, which involves continuously introducing an inert gas in small amounts? I would appreciate some advice from fellow travelers with relevant experience.
These are two completely different things; preventing negative pressure in the compressor’s intake pipe can be addressed through measures such as pressure interlocks, that is, the unit stops operating when the intake pressure drops to a set value. Nitrogen sealing is generally used for the long-term transportation and storage of important equipment, as well as to seal the shaft seals of certain devices by introducing nitrogen; it has nothing to do with preventing negative pressure in compressors.