I-polypropylene yezinhlobo ezintathu, noma i-copolymer engahleliweipayipi le-polypropylene, kubhekiselwa kuso isifinyezo esithi PPR. Le nto isebenzisa i-heat welding, inamathuluzi akhethekile okushisela nokusika, futhi inopulasitiki ophakeme. Izindleko nazo zinengqondo. Uma i-insulating layer ingeziwe, ukusebenza kwe-insulation kuyathuthuka futhi udonga lwamapayipi, ngaphandle kwezixhumanisi phakathi kwezintambo zangaphakathi nangaphandle, nazo zibushelelezi kakhulu.

Ngokuvamile isetshenziswa kumapayipi angcwatshwe ngaphambili emithonjeni ejulile noma ezindongeni ezishunyekiwe.Ipayipi le-PPRinokuphila kwesevisi okufika eminyakeni engama-50, inenani elifanele, izinzile ekusebenzeni, ukumelana nokushisa futhi igcina ukushisa, imelana nokugqwala, ibushelelezi futhi ingalinganisi odongeni lwangaphakathi, iphephile futhi inokwethenjelwa ohlelweni lwamapayipi. Ukuqinisekisa ukuphepha kwalolu hlelo, imishini esezingeni eliphezulu nezisebenzi eziqeqeshiwe ziyadingeka ukuze kwakhiwe, okunezidingo zobuchwepheshe eziphakeme.

Ama-hues athambile, afanayo-kunokuba amathoni aguquguqukayo atholakala kwamanye amapayipi amanzi-nikezaIpayipi lamanzi le-PP-Risici esikhangayo nombala. (Abathengi bavame ukucabanga ukuthi umbala omhlophe uwumbala ongcono kakhulu wamapayipi e-PP-R, kodwa umbala awuwona uphawu lokulinganisa ikhwalithi yokwahlulela; ikhwalithi yamapayipi amanzi e-PP-R ihlukile kuleyo yamapayipi e-PP-R, kanye nombala wamanzi ipayipi alihlanganise lutho nalo (kukhona neminye imibala eyengezwe ngombala we-masterbatch). Ngakho-ke, akubalulekile ukuthi ipayipi lamanzi linemibala enjani.

Ngokuvamile, izinto ezingavuthiwe kuphela ze-PP-R ezingasetshenziswa ukudala izimpahla ezimhlophe. Isibonelo, kuyilapho eminye imikhiqizo enemibala ecutshungulwa ngama-masterbatches anemibala ihlanganiswa nezinto ezigaywe kabusha, izinto ezilahlwayo, nezinto ezikhona, umbala wemikhiqizo okhiqizwa ngokwengeza izinto ezigaywe kabusha, izinto ezilahlwayo, nezinto zekhona awuthambile futhi awulingani. Umbala womkhiqizo ngeke uthintwe izinto ezisetshenziswayo, njll. Ingaphakathi lomkhiqizo nengaphandle kufanele lingabi nasici futhi libe sicaba; amaphutha afana namabhamuza omoya, ama-glaring depressions, ama-grooves, nokungcola akwamukelekile.

Zonke izinto eziyisisekelo zamapayipi amanzi e-PP-R amahle yi-PP-R. (ngaphandle kwezithasiselo). Ihlanzekile ngokubukeka, enendawo ebushelelezi nesibambo esikhululekile. Amapayipi okulingisa e-PP-R azizwa ethambile. Ngokuvamile, izinhlayiya ezimaholoholo zivame ukufaka ukungcola; i-polypropylene iyingxenye eyinhloko yamapayipi e-PP-R. Amapayipi ampofu awanuki ngendlela exakile, kanti amapayipi amahle awanuki. Ngokuvamile, i-polyethylene kune-polypropylene ihlangene.

Izinga lokushisa elijwayelekile lokushisela lamapayipi e-PP-R liphakathi kuka-260 no-290°C. Izinga le-weld lizoqinisekiswa kangcono kulawa mazinga okushisa. Umkhiqizo ungangena kalula ekhanda le-welding die ngesikhathi sokushisela uma imingcele ye-welding ijwayelekile. Ukwengeza, izigaxana zokunqwabelana komkhiqizo cishe ziwuketshezi, okubonisa ukuthi awuzange udalwe ngezinto zokusetshenziswa zangempela ze-PP-R.

Umkhiqizo futhi awenziwanga ngezinto zokusetshenziswa zangempela ze-PP-R uma izigaxana zokunqwabelana zokushisela zingaphola futhi ziqine ngokushesha (imvamisa phakathi nemizuzwana eyi-10). Lokhu kungenxa yokuthi i-PP-R inomphumela onamandla wokulondoloza ukushisa, okusho ukuthi izinga lokupholisa ngokwemvelo lizohamba kancane.
Hlola ukuze ubone ukuthi ukufakwa kwamapayipi kudwetshiwe futhi uma ububanzi bangaphakathi bepayipi buhlanekezelwe. Ububanzi bangaphakathi bepayipi elihle le-PP-R alikwazi ukudwetshwa, futhi aligobeki kalula.