Air line pressure drop 2

[geodesia]

I am not a process engineer, and I have right now a quite basic problem I need to solve, therefore your help would be appreciated

I have to calculate the pressure drop of a air tubing, that goes from a reservoir to a horn.
Line is 1/2" SStubing 0.035"
Length: 50 ft straight+ 5 x 90º bends
Air is at 100 psig, 104ºF
Airflowrate: 21cfm@150psig

Could you tell me how can I calculate the pressure drop?

Basic lesson!!
Thanks in advance

 

[dogtop]

See:

http://www.pressure-drop.com/Online-Calculator/index.html

HTH

 

[Krasek]

26.2 bar

 

[Krasek]

above result is for smooth pipe

 

[Krasek]

here is a spreadsheet - sorry for confusion (I made some mistake in estimation od air properties)

 

[geodesia]

Thanks Kraasek!
Buyt if you notice..pressure drop is higher than pressure available