International Science and Technology Journal

This paper deals with the effect of the pipe roughness on energy losses, as it has an important effect on the process of transporting and supplying water, because of its impact on the amount of losses resulting from the friction between the water and pipe walls. Where a case was studied for a type of pipe with two different roughnesses, One is soft (λ_1=0.02905), and the other is coarse (λ_2=0.07165), and several attempts were made to find out the effect of the roughness on the total head. The study concluded that the greater the amount of roughness of the pipe wall, the greater the amount of friction loss, and thus the greater the amount of energy loss. This study recommends care when choosing the type of pipe used in infrastructure projects, in terms of hydraulic efficiency, which is directly affected by the roughness of the pipe wall