compressed air pipe size for 4 bar

Questions & Answerscompressed air pipe size for 4 bar
Cas Staff asked 3 years ago

What is the suitable pipe size for a pressure of 4 bar and 330 CFM flow rate ?

1 Answers
Cas Staff answered 3 years ago

4 bar and 330 CFM gives about (4+1)*330=1650 Normal CFPM.

Take a look at the table here:

This table is made for 7 bar. So for 4 bar, we need to multiple the ncfpm by 7/4=1.75.

1650 * 1.75 = 2887.
If we look at 2887 ncfpm, we find about 100 – 125 mm pipe size, depending on the legth of the pipe.

That answer seemed a bit high (what are you using it for??) IF the 330 is already normal cfpm, look at 300*1.75=525 cfpm… which gives us about 63 mm pipe.

For an example of converting air flow to Normal airflow, see this page: