Hydraulic studies of pressure pipes made of various materials

Introduction. To solve the problem of water shortage for irrigation in the city of Kerbala (Iraq), for the first time, a decision was made to use treated wastewater from urban wastewater treatment plants. Transportation of water from treatment facilities to irrigated lands is carried out through a pipeline in a pressure mode. The article compares the results of simulation modeling of WaterCAD V8i at various flow rates in a pressurized water supply system with the results of laboratory studies for three types of pipe materials (100 mm diameter steel pipe with polymer coating, 100 mm diameter polyethylene pipe and 100 mm diameter steel pipe with cement-sand coated (diameter 90 mm)). The purpose of the work is to verify the results obtained in the WaterCAD V8i program by conducting experiments for various types of pipes. Materials and methods. During the experiment, the characteristics of the flow were studied. Results. Comparison of the experimental results with the results obtained using the WaterCad V8i simulation model showed that the hydraulic parameters (pressure loss, friction coefficient) are close in values, but the WaterCad V8i program recorded higher values for pipes (steel pipe with a diameter of 100 mm with a polymer coating and a polyethylene pipe with a diameter of 100 mm). The high convergence of the results for a number of hydraulic parameters can be noted. Conclusions. The results of the work carried out by comparing the experimental data with the calculated ones obtained using the WaterCAD V8i program allow us to conclude that it can be widely used in practice to determine the hydraulic performance of pipelines.