ʻI he angamahení, ʻOku fakataumuʻa ʻa e kasa fakanatula pipelines ke malu pea ʻoua naʻa ke ʻita ʻi he ngaahi tukunga angamaheni.
Neongo ia, foaki ʻa e ngaahi ʻulungaanga fakafepaki lahi ʻo e kasa fakanatula, ʻe lava ke fakatuʻutamaki ʻaupito ʻa e ngaahi mama ʻi he pipeline. ʻI he taimi ʻoku fetaulaki ai ʻa e kasa mama mo ha ulo pe ko ha maʻuʻanga vela mahuʻinga, ʻe lava ke iku ia ki ha fakaʻauha vave mo fekeʻikeʻi.