Enter the flow rate in standard liters per minute (slpm), temperature in degrees Celsius (°C), and pressure in atmospheres (atm) into the calculator to convert the flow rate to normal liters per minute (nlpm).
Slpm to Nlpm Conversion Formula
The following formula is used to convert the flow rate from slpm to nlpm.
NLPM = SLPM * (Tstd / (T + Tstd)) * (P / Pstd)
Variables:
- NLPM is the flow rate in normal liters per minute
- SLPM is the flow rate in standard liters per minute
- T is the temperature in degrees Celsius (°C)
- Tstd is the standard temperature (0°C or 273.15K)
- P is the pressure in atmospheres (atm)
- Pstd is the standard pressure (1 atm or 1.01325 bar)
To convert slpm to nlpm, multiply the slpm value by the ratio of standard temperature to the actual temperature in Kelvin and then multiply by the ratio of actual pressure to standard pressure.
What is Slpm and Nlpm?
Slpm (standard liters per minute) is a unit of flow rate that refers to the volume of gas that passes a point in one minute under standard temperature and pressure conditions. Nlpm (normal liters per minute) is another unit of flow rate that refers to the volume of gas that passes a point in one minute under normal temperature and pressure conditions. The conversion between these two units is necessary when comparing flow rates measured under different conditions.
How to Calculate Slpm to Nlpm?
The following steps outline how to convert the flow rate from Slpm to Nlpm.
- First, determine the flow rate in slpm.
- Next, determine the temperature at which the flow rate is measured in degrees Celsius (°C).
- Next, determine the pressure at which the flow rate is measured in atmospheres (atm).
- Use the formula from above to calculate the flow rate in nlpm.
- After inserting the variables and calculating the result, check your answer with the calculator above.
Example Problem :
Use the following variables as an example problem to test your knowledge.
Flow rate in slpm (SLPM) = 50 slpm
Temperature (T) = 25°C
Pressure (P) = 1 atm