airflow - Converting flow rate from normal/standard liters per minute …
https://engineering.stackexchange.com/questions/37529/converting-flow-rate-from-normal-standard-liters-per-minute-to-cubic-meters-per
WEBSep 7, 2020 · The difference between NLPM and SLPM is: We put 1 liter of air at 0° C and sea level 1013.25 mBar in a cylinder. This is called “Normal Flow”. When the temperature is raised to 20°C, the molecules need more space. The piston will go up and the volume increases to 1.073 liters - exactly 7.3%. This is called “Standard Flow.”
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