Re: Surface Roughness of GRP pipe

According to two major FRP (GRP) piping makers, the absolute roughness of new pipe is 0.00021 inches (Manning coeff of 0.009, Hazen-Williams C of 150).

I am not aware of any data on old GRP pipe.

Neil Stone

At 12:41 PM 4/18/2001 +0000, you wrote:
>Hello group,
>
>Does anyone know what is the typical surface roughness (for friction
>factor calculations) of new and old GRP pipe?
>
>Another small question, why can't list members access the archives of
>this group?
>
>Regards,
>
>Sharaf F. Al-Sharif
Received on Thu Apr 19 09:11:00 2001