Pigging Efficiency

Pigging efficiency, abbreviated as \(\eta_{pig}\) (Greek symbol eta), a dimensionless number, 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