2021. Investigation of the External Loads Applied on the PVC and PE Pressurized Pipes. Journal of Al-Rafidain University College For Sciences ( Print ISSN: 1681-6870 ,Online ISSN: 2790-2293 ). 39, 1 (Oct. 2021), 406–426. DOI:https://doi.org/10.55562/jrucs.v39i1.220.