Roughness factor for tubing?

Question

I've been working with pressure drop calculations in piping for awhile now. With piping there are roughness factors (ε) for a wide range of materials like steel, plastic, and iron. My question is, are there similar values for tubing? For example, will copper tubing have a different roughness than stainless steel tubing? If so where can such values be found?

Thank you.

Answer 1

http://www.engineeringtoolbox.com/hazen-...

Try that site.  It has several useful links.  If you need more, find a book of Hazen-Williams Hydraulic Tables.

Answer 2

In the ASHRAE fundamentals edition you can find charts like the one i'm posting bellow which i got from this ASHRAE fundamentals edition, this one shows the losses of water going through a copper tubing type L Depending on its diameter and water flux.

Hope this helps.

http://www.geocities.com/calccifrarom/co...