Ipayipi eligqitshwe ngokuqondile lifakwa amagwebu ngenxa yokusabela kwamakhemikhali ezinto eziyinhlanganisela ye-polyether polyol esebenza kakhulu kanye ne-polymethyl polyphenyl polyisocyanate njengezisetshenziswa zokusetshenziswa. Amapayipi okufakwa okushisa angcwatshwe ngokuqondile asetshenziselwa ukwahlukanisa okushisayo kanye namaphrojekthi okushisa abandayo amapayipi ahlukahlukene angaphakathi nangaphandle, amapayipi okushisa aphakathi nendawo, amapayipi omoya ophakathi, amakhemikhali, imithi kanye namanye amapayipi ezimboni. Uhlolojikelele Kusukela kwazalwa izinto eziyinhlanganisela ye-polyurethane ngeminyaka yawo-1930, ipayipi lokufakwa kwegwebu le-polyurethane liye lathuthukiswa ngokushesha njengento enhle kakhulu yokufaka ukufudumala okushisayo, futhi ububanzi bokusetshenziswa kwalo seluyanda kakhulu. Isetshenziswa kabanzi kumapayipi ahlukahlukene njengokufudumeza, ukupholisa, ukuthuthwa kukawoyela, nokuthuthwa ngesitimu.

Izinkinga ezivamile kanye nezixazululo ekwakhiweni kwamapayipi okushisa angcwatshwe ngokuqondile

Lesi simo ngokuvamile sivela ekwindla nasebusika noma ekwakhiweni kwasekuseni, ngoba izinga lokushisa liyehla ngokuzumayo noma izinga lokushisa liphansi. Ingaxazululwa ngokwandisa izinga lokushisa elizungezile kanye nezinga lokushisa lempahla emnyama. Ngokuvamile, izinga lokushisa lezinto ezimnyama likhuphukela ku-30-60 ° C, futhi izinga lokushisa le-ambient likhuphukela ku-20-30 ° C.

Lesi simo ngokuvamile senzeka entwasahlobo nasehlobo noma phakathi nokwakhiwa emini, ngenxa yokuthi izinga lokushisa liyakhuphuka ngokuzumayo nezinga lokushisa liphezulu kakhulu. Izinto ezimnyama zingapholiswa ngamanzi abandayo noma zibekwe ngaphandle ebusuku ukuze kuphole ngokwemvelo ukugwema ukukhanya kwelanga okuqondile.

Amandla egwebu epayipi lokufakelwa eligqitshwe ngokuqondile mancane futhi igwebu lithambile. Lesi simo sibangelwa ukungalingani kwesilinganiso sezinto ezimnyama nezimhlophe. Ingxenye yezinto ezimnyama ingandiswa ngokufanelekile (1:1-1.05). Qaphela ukuthi ungenzi isilinganiso sezinto ezimnyama sikhulu kakhulu, ngaphandle kwalokho, kuzobangela I-foam iba brittle, ebuye ithinte ukusebenza kwe-foam.

Ipayipi lokufakelwa eligqitshiwe eliqondile seliphenduke ubuchwepheshe obuthuthukisiwe obuvuthiwe kwamanye amazwe athuthukile phesheya. Eminyakeni eyishumi edlule, ubunjiniyela bokushisisa kanye nabasebenzi bezobuchwepheshe bezwe lami bakhuthaza ukuthuthukiswa kobuchwepheshe bokubeka amapayipi asekhaya ezingeni eliphezulu ngokugaya kanye nokumunca lobu buchwepheshe obuphambili. Imiphumela engokoqobo kule minyaka eyishumi edlule ikufakazele ngokugcwele ukuthi indlela yokubeka ipayipi elivalela ukushisa eligqitshwe ngokuqondile inezinzuzo eziningi uma kuqhathaniswa nomsele ovamile kanye nokwendlaleka phezulu. Ipayipi lokufaka ukushisa elingcwatshwe ngokuqondile lihlanganiswe eduze nepayipi lensimbi lokudlulisa okuphakathi, i-polyethylene yangaphandle ye-high-density, kanye nongqimba oluqinile lwe-polyurethane foam insulation phakathi kwepayipi lensimbi kanye ne-casing yangaphandle. Lokhu futhi kungamandla okushayela angaphakathi okuthuthuka ngokushesha kwe-polyurethane thermal insulation ngqo amapayipi agqitshwe kubunjiniyela bokushisisa bezwe lami.