Parizvino, mitemo yakagamuchirwa zvakanyanya yemapaipi esimbi ekufambisa mafuta negasi munyika nekunze kwenyika inosanganisira: (1) API SPEC 5L "Specification for Line Pipe" neAmerican Petroleum Institute. (2) Mitemo yepasi rose ISO 3183-1, -2, -3 "Petroleum and Na...