Restrictive orifice placement criteria
Restrictive orifice placement criteria
(OP)
I understand the upstream / downstream criteria for straight pipe when using a flow orifice set with pressure taps, but I am wondering if restrictive orifices (plates) held by regular flanges have similar criteria.
One in question is in a 10" line using CL150 RF flanges for balancing cooling water flow.
Any help on placement criteria of this type of component would be appreciated.
thanks
Mark
One in question is in a 10" line using CL150 RF flanges for balancing cooling water flow.
Any help on placement criteria of this type of component would be appreciated.
thanks
Mark





RE: Restrictive orifice placement criteria
Pressure taps should have as little turbulence as possible.
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"Pumping accounts for 20% of the world's energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies) http://virtualpipeline.spaces.live.com/
RE: Restrictive orifice placement criteria
thanks again
RE: Restrictive orifice placement criteria
RO's are just as sensitive to upstream downstream disturbances as flow meters especially in flow balancing, but because flow balancing is not a precise business anyway, use the 10 up/ 5 down rule as a minimum
RE: Restrictive orifice placement criteria
Thanks for the correction hacksaw!
**********************
"Pumping accounts for 20% of the world's energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies) http://virtualpipeline.spaces.live.com/