如何在AspenONE V7.2操作让不同的模块有不同的物性方法 ...? 回复 16# pengcui86 psia is pounds per square inch absolute, that is it includes atmospheric pressure. psig is the reading you get on a gauge and is atmospheric pressure (14.7 psi) less. psi is just pounds per square inch and it is appropriate to use this when one is talking about pressure difference.查看更多