Ipayipi yensimbi eyindilinga iwuhlobo lwepayipi elinesiphambano esiyindilinga, esinezindawo eziningi zokufaka isicelo.Ayinayo nje izici eziyingqayizivele, kodwa futhi inezinhlobonhlobo zamathemba ohlelo lokusebenza.
I-Technique: Okunye, Okugoqiwe Okushisayo, Okubandayo Okugoqiwe,ERW,I-High-frequency welded,I-Extruded