A new representation of the viscosity of ethane is presented. The repr
esentative equations are based upon a body of experimental data that h
ave been critically assessed for internal consistency and for agreemen
t with theory in the zero-density limit, vapor phase, and critical reg
ion. The representation extends over the temperature range from 100 K
to the critical temperature in the liquid phase and from 200 K to the
critical temperature in the vapor phase. In the supercritical region,
the temperature range extends to 1000 K for pressures up to 2 MPa and
to 500 K for pressures up to 60 MPa. The ascribed accuracy of the repr
esentation varies according to the thermodynamic state from +/-0.5% fo
r the viscosity of the dilute gas near room temperature to +/-3.0% for
the viscosity at high pressures and temperatures. Tables of the visco
sity, generated by the relevant equations, at selected temperatures an
d pressures and along the saturation line, are also provided.