It can be used in the ring network pipeline with medium flowing in two directions, that is, the flow direction of medium is not limited;
3 Ingasetshenziswa kulayini wepayipi lenethiwekhi elinokugeleza okuphakathi okuya ezinhlangothini ezimbili, okungukuthi, ukuqondiswa kokugeleza kwaphakathi akukhawulelwe;