Assessment of Friction Losses and Friction Factor in Polypropylene Pipes. Tikrit Journal of Engineering Sciences, [S. l.], v. 32, n. 4, p. 1–14, 2025. DOI: 10.25130/tjes.32.4.23. Disponível em: https://www.tj-es.com/ojs/index.php/tjes/article/view/2324.. Acesso em: 9 sep. 2026.