Pipe Size

Pipe is made by surrounding a hole with some solid stuff to hold in the stuff that goes through the hole, or pipe.

Knowing what stuff is going through the hole would help.

service- compressed air, of 10 kg/cm2,we require the pipe size for 10000 cfm flow.

Pipe velocity for this application can be taken 8 to 10 m/s. Assuming pressure 10 kg/cm2 (absolute) and flow 10000 cfm at NTP, you require 12" pipe.

He probably means 'expanded' - as in 'free air' - as in air tool rating.

_{[May be helpful if you stayed with one measurement system]}

What fluid, how long is the pipe, and how much pressure drop is acceptable?

Its something more like this. play & pick with the Reynolds number find the pipe size. All conditions are there given in the MooDy diagram.

On a quick search, I didn't find a chart that went to that high a flow. One hesitates to extrapolate, but from the trends in the following table, it looks as though 5" pipe would be about right. (But only with further confirmation.)

http://www.engineersedge.com/pipe_flow_capacity.htm