Fluid flow in pipelines, which occurs in various sectors such as mechanical engineering, civil engineering, petroleum engineering, and process engineering, is one of the major events. There are many parameters influencing the efficiency of fluid transportation such as flow rate, pressure loss, Reynolds number, pipe diameter, and roughness of the pipe surface. This paper describes an experiment aimed at studying the features of fluid flows through pipelines in different modes of operation. Pipes of different diameters and material were utilized in the experiment. The equations based on the Bernoulli principle and Darcy-Weisbach formula have been utilized for comparison between predictions and practical observation data. It is evident from the analysis that the roughness of pipes and the velocity of fluids are responsible for causing significant increase in pressure loss. The calculation of Reynolds number is helpful to understand the characteristics of laminar and turbulent flow.

Keywords: Fluid flow, Pipeline system, Reynolds number, Pressure drop, Darcy–Weisbach equation, Turbulent flow, Laminar flow.