Click the CALCULATE button and the answer is 114.59 centimeters per second AND the answer is in 23 other different units ! For example, if the fourth power is 16, the length of the pipe is 300 feet and the pressure drop is 0.2 pounds per square inch, the answer is 4,641. 50. Using TABLE 1, find your compressor’s CFM number on the far left … for pipes ranging size 3/4" to 3" - pressure drop 5% of applied pressure per 100 feet of pipe. Record the result, which is the air flow rate in the pipeline, expressed in cubic feet per minute, or CFM. The thread size of the port on your air compressor tank does not determine the pipe size for your piping system. Includes 53 different calculations. Equations displayed for easy reference. Measure and write the corresponding lengths of pipe on your schematic, then total the length of all straight pipes needed and note that on your schematic. Online calculator to quickly determine Air Flow Rate through Piping. 100. Make a note of the result. The pressure just “pushes” the air out, and with half the “push” you get half the air … It is calculated with the length of your piping (building size) and air compressor CFM output. Check each step of your work. 2: Separate the Tank from the compressor (ie, compressor is off). (cfm) Length of Pipe (feet) 25. Steps to figuring what size piping your compressed air system needs: 1. Ie, if you charge to 120 psi, and pull the electrical plug….if you get 8 CFM at 120 psi, you will get 4 CFM at 60 PSI. 3. for pipes ranging size 1/8" to 1/2" - pressure drop 10% of applied pressure per 100 feet of pipe. The relationship between CFM and PSI is just linear. The horsepower required to drive air through a pipe equals the volume of air in cubic feet per second multiplied by the pressure in pounds per square foot, and this product divided by 550. ! Recommended air pipe line sizes with schedule 40 steel pipes and air pressure 100 psi (6.9 bar, 689500 Pa): Recommended Pipe Size (inches) Free Air Flow. 2. Enter 9 in the in the flow rate box and choose liters per second from its menu. 75. Draw a piping schematic and show all pipe fittings, valves, etc. 4. Enter 10 in the pipe diameter box and choose centimeters from its menu. Even though the port on your tank may be small, the air is only traveling through a short distance, so the restriction is minimal. Determine your air compressor’s maximum CFM. SCFM.