Today , new materials which are manufactured pipes allow higher speeds with smooth turbulent flows , for which the flow friction factor is altered to a greater extent by the Reynolds number and to a lesser extent are developed by the roughness of the pipe. Therefore, the friction factor estimated by the equations of Colebrook -White is only an approximation since the experiments used to develop these equations were performed with much rougher than those found today pipes. In this thesis the Colebrook -White equation will be reviewed in order to modify parameters to estimate the friction factor for smooth turbulent flow , so that it is applicable to the behavior of the flow in pipes commercial materials available today. This will allow more optimal designs in technical and economic terms , as the underestimation or overestimation could generate larger and more expensive than necessary designs or otherwise , does not allow enough water flow in networks