1) Chitoliro cha PVC ndi chiyambi cholumikizira

Mawonekedwe
Osakhala ndi poizoni: palibe zowonjezera zachitsulo cholemera
Kukana Kudzimbiritsa: Kukana zinthu za mankhwala, dzimbiri la mankhwala a elekitironi kapena dzimbiri
Ndalama Zotsika Zoyikira: kulemera kochepa komanso kosavuta kuyikira
Makoma osalala amkati: kukanda kochepa komanso voliyumu yokwera kuposa mapaipi achitsulo
Moyo Wautali: zaka zoposa 50 pansi pa mikhalidwe yabwinobwino
Yobwezerezedwanso komanso Yogwirizana ndi chilengedwe

Mapulogalamu
mapaipi otulutsira dothi ndi zinyalala mkati mwa nyumbayo
mapaipi a madzi amvula mkati mwa nyumbayo
mapaipi otayira madzi obisika opanda kupanikizika pansi

2) Chitoliro cha PVC ndi ubwino wake

1. Kulemera kopepuka: kulemera kwa unit length ndi 1/6 yokha ya mapaipi achitsulo chopangidwa ndi chitsulo.
2. Mphamvu yayikulu: mphamvu yokoka imafika pamwamba pa 45 Map.
3. Kukana kochepa: khoma lamkati ndi losalala ndipo limaletsa kusonkhana kwa zinyalala. Kuthamanga kwa madzi ndi kutuluka kwa chitoliro cha PVC-U ndizochepa ndi 30% kuposa mapaipi achitsulo chopangidwa ndi chitsulo chokhala ndi mulifupi womwewo ndipo zimatha kusunga ndalama zotulutsira mphamvu.
4. Kukana dzimbiri: kukana dzimbiri komwe kumachitika chifukwa cha ma asidi, alkaline, mankhwala ndi magetsi, motero sikubweretsa madontho.
5. Kukhazikitsa kosavuta: kumalumikizana mosavuta ndi mphete za rabara. N'kosavuta kuyika ndikutseka bwino.
6. Nthawi yayitali ya moyo: pansi pa mikhalidwe yabwinobwino, moyo umatha kufika zaka 50.
7. Mtengo wotsika: ndi mtengo wotsika woyikira. Mayendedwe ndi zipangizo zopangira, mtengo wonse wa uinjiniya umapangitsa PVC-U kukhala yotsika ndi 30% kuposa mapaipi achitsulo chopangidwa ndi chitsulo.