What units are you working in? What application? Is it control lines, workshop, plant air, or larger volumes? What pressures are you using? This affects piping and details.

Do you have a piping flow design program, or are you looking for a table such as you would find in a text book? Data books used to be published by compressor vendors many years ago. These are still available in libraries and contain data which is still valid.

Alternatively you can write your own spreadsheet for doing the calculation. There should be a pipe flow design program available on the Net, but I dont have the site address.

Try www.fluidflowinfo.com

Take a look at PipingDesign.com. I have a few links to different fluid flow-related software packages there as well as some information on piping layout.

If you're new to piping, I'd suggest you consult a local mechanical engineer for advice.

Paul
___________________________________________________
Web-Based Resource for Process Piping Professionals
Mailing List: <http://www.egroups.com/group/PipingDesign>;
Webpage: <http://www.PipingDesign.com>;