Thispaperconsidersthestationaryflowofincompressiblemicropolarfluidthroughathincylindricalpipegovernedbythepressuredropbetweenpipe'sends.Itsgoalistoinvestigatetheinfluenceoftheviscositycoefficientsontheeffectiveflow.Dependingonthemagnitudeofviscositycoefficientswithrespecttothepipe'sthickness,itderivesdifferentasymptoticmodelsanddiscussestheirproperties.