Pigging Efficiency
Pigging efficiency, abbreviated as \(\eta_{pig}\) (Greek symbol eta), is expressed in percentage and always less than 100%.
Pigging Efficiency formula
\(\large{ \eta_{pig} = \frac { \left(\frac{ Q }{ \Delta p }\right)_{ap} \;-\; \left(\frac{ Q }{ \Delta p }\right)_{bp} }{ \left(\frac{ Q }{ \Delta p }\right)_{bp} } 100 \% }\) |
Where:
\(\large{ \eta_{pig} }\) (Greek symbol eta) = pigging efficiency
\(\large{ ap }\) = after pigging
\(\large{ bp }\) = before pigging
\(\large{ \Delta p }\) = pressure differential
\(\large{ Q }\) = volumetric flow rate