Compressed air system question

Aug 2019
When dealing with a compressed air system I would like to know how to make some calculations to predict pressure and flow rate throughout a system.

If I have a compressor that can supply 50 cfm @ 100 psi at the source, and the air flows through a system of pipes, filters, turns, etc. which causes head loss, and lets assume the head loss is known. If I have a pneumatic tool that runs at 75 psi, what type of flow rate could I expect?

This type of question is common is industry and I found it difficult to find resources regarding this type of question. Yes, there is general information but no clear way to make "rough" predictions.