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C Value 2" Flexible Hose

C Value 2" Flexible Hose

C Value 2" Flexible Hose

(OP)
Anyone know the C values for 1" rubber hose, or 2" and 3" flexible hosing, commonly used on hydrant outlets?

I've been assuming 90 or 100.

RE: C Value 2" Flexible Hose

Typical values of c for commonly used rubber-lined hoses are as follows:

Hose diameter    c value
1"            150
1-1/2"         24
2"              8

The values of c for various hoses, can be found in the Fire Protection Handbook published by the National Fire Protection Association (NFPA).
http://www.msha.gov/regs/complian/ppls/2006/PPL06-V-2appendix.pdf

RE: C Value 2" Flexible Hose

Note the NFPA equation the c bimr gave is not the H-W equation.  So the NFPA c does not equal the C in the H-W equation, if that is what you wanted.

Engineering is the practice of the art of science - Steve

RE: C Value 2" Flexible Hose

(OP)
Sorry, I should have been more clear - I am looking for the Hazen Williams C value.  

Anyone have a rough idea, am I pretty close using a c of 100?

RE: C Value 2" Flexible Hose

C=100 for rubber hose is probably a conservative value and hardly think that anyone would second guess you for that.

RE: C Value 2" Flexible Hose

I have seen values of 130 that correspond with manufacturer friction loss tables, a little higher than probably occurs with an older hose.  

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