PL
The transformation of pseudo-Newtonian dimensionless numbers: Re and fs, describing flow of power-law non-Newtonian fluids in circularly curved tubes, has been done. It has been shown that the multi-parameter friction curves of power-law non-Newtonian fluid can be described, in new dimensionless coordinate system, with the help of single curve in the laminar as well as turbulent flow region. Moreover, the criterion of transition from laminar to turbulent region was clearly determined.