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The  head loss is a fundamental parameter for the dimensioning of the pipes, being directly related to the cost of these pipes, the selection of the pumping system and the energy cost of electricity. That study fitted the Hazen-Williams equation and compared it with the Darcy-Weisbach equation.The performance of the adjusted equation was determined by the concordance index (c), Statistical Standard Error (EPE), Mean Absolute Error (EAM), Maximum Absolute Difference (DAmax) and Mean Absolute Difference (DAmed). The results show that all gridded indices to verify the performance of the adjusted Hazen-Willians equation have improved. The largest difference between the values of continuous load loss between the Darcy-Weisbach method and the adjusted Hazen-Williams equation was about 0.08%, which can be considered extremely low

AJUSTE DA EQUAÇÃO DE HAZEN-WILLIANS PARA DETERMINAÇÃO DA PERDA DE CARGA CONTÍNUA EM TUBULAÇÕES DE PVC