Ipayipi le-PEX, noma ipayipi le-polyethylene elixhunywe, luhlobo lwepayipi oluguqula isakhiwo se-molecular esilayini se-polyethylene sibe isakhiwo senethiwekhi esinobukhulu obunhlangothi ezintathu ngempela ngezindlela zomzimba noma zezemvelo, ngaleyo ndlela kuthuthukiswe ukumelana nokushisa, ukumelana nokukhuluphala, kanye namandla omshini.

**Izindlela eziyinhloko zokukhiqiza ipayipi le-PEX zifaka phakathi inqubo ye-Engel (inqubo ye-peroxide), inqubo ye-silane, kanye nenqubo yokukhanya, ehambelana nezinhlobo ze-PEX-A, PEX-B, kanye ne-PEX-C, ngokulandelana.**

Inqubo ye-Engel yakha izixhumi zamakhemikhali ngokusebenzisa izinga lokushisa eliphezulu kanye nengcindezi; inqubo ye-silane ixuba i-silane ngesikhathi sokuphuma ukuze ikhiqize isakhiwo esinobukhulu obunemithombo emithathu; kanti inqubo yokukhanya isebenzisa ama-ray γ noma β ukuze kube nokuxhumana komzimba. Izinhlobo ezahlukene zamapayipi e-PEX zihluke ekumelaneni nokushisa nasekuphukeni kokucindezela. Isibonelo, i-PEX-A ikakhulu yakhiwe ngesakhiwo senethiwekhi esinobukhulu obubili, kanti i-PEX-B ne-PEX-C ziqinile kakhulu ekushiseni ngenxa yesakhiwo sazo esinobukhulu obunemithombo emithathu.

**Izinto eziyinhloko zokwakha ipayipi le-PEX ziyi-polyethylene enedensity ephezulu (HDPE), enezinto ezingeziwe, abaqalayo, abaxhunyayo, abakhiqizi, nezinye izinto ezingeziwe. Izinguquko zingangezwa futhi ukuze kuhlangatshezwane nezidingo ezikhethekile.** 1. Inqubo yayo yokukhiqiza ifaka phakathi ukulungiswa kwezinto zokwakha, ukuhlanganiswa, ukuhlinzwa kokushisa, ukwakhiwa kwepayipi, ukuhlanganiswa, ukuhlolwa, kanye nokupakishwa. Izithasiselo ezifana nezithasiselo zokuvikela zingathuthukisa ukumelana nokugqwala kanye nezikhathi zokusebenza.

Amapayipi e-PEX anohlu olubanzi lwezicelo, ikakhulukazi kuhlanganisa: ukuhlinzeka ngamanzi ngaphakathi, ukuhamba kwamanzi ashisayo namanzi ahlanzekile; izinhlelo ze-HVAC, ukushisa ngaphansi komhlaba kanye nezishintshi zamanzi elanga; ukuhamba kwe-liquid embonini yokudla; ukuxhumana nezintambo zikagesi; kanye namapayipi ezinto ezikhipha amakhemikhali.