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 |
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\(\large{ \eta_{pig} = \frac { \left(\frac{ Q }{ \Delta p }\right)_{ap} \;-\; \left(\frac{ Q }{ \Delta p }\right)_{bp} }{ \left(\frac{ Q }{ \Delta p }\right)_{bp} } \;100 }\) | ||
Symbol | English | Metric |
\(\large{ \eta_{pig} }\) (Greek symbol eta) = pigging efficiency | \(\large{dimensionless}\) | |
\(\large{ ap }\) = after pigging (upstream suction pressure) | \(\large{\frac{lbf}{in^2}}\) | \(\large{Pa}\) |
\(\large{ bp }\) = before pigging (upstream suction pressure) | \(\large{\frac{lbf}{in^2}}\) | \(\large{Pa}\) |
\(\large{ \Delta p }\) = pressure differential | \(\large{\frac{lbf}{in^2}}\) | \(\large{Pa}\) |
\(\large{ Q }\) = volumetric flow rate | \(\large{\frac{ft^3}{sec}}\) | \(\large{\frac{m^3}{s}}\) |