Iminyaka eminingi, ububanzi obukhulu (amayintshi angu-16 nangaphezulu) imakethe yamapayipi amanzi imelwe yipayipi lensimbi (SP), i-Precast Concrete Cylindrical Pipe (PCCP), iDuctile Iron Pipe (DIP) kanye nepayipi le-PVC (Polyvinyl Chloride).Ngakolunye uhlangothi, ipayipi le-HDPE libalelwa ku-2% kuya ku-5% kuphela wemakethe enkulu yamapayipi amanzi.
Lesi sihloko sihlose ukufingqa izindaba ezithinta ingqondo ezihlotshaniswa namapayipi amakhulu e-HDPE kanye nezincomo zokuxhunywa kwamapayipi, ukufakwa, ukulinganisa, ukuklama, ukufakwa, nokugcinwa.
Ngokombiko we-EPA, izinkinga zokuqonda ezizungeze amapayipi amakhulu e-HDPE abilayo afinyelela amaphuzu amathathu abalulekile.Okokuqala, kukhona ukuntula okujwayelekile kokuqonda umkhiqizo.Kumaphrojekthi kamasipala, inani lababambe iqhaza lingenza kube nzima ukudluliswa kolwazi emikhiqizweni ehlobene.Ngokufanayo, abasebenzi bavamise ukusebenzisa imikhiqizo kanye nobuchwepheshe obujwayelekile.Okokugcina, lokhu kuntuleka kolwazi kungaholela ngisho nasengqondweni eyiphutha yokuthi i-HDPE ayifanele ukusetshenziswa kwamanzi.
Inkinga yesibili yokuqonda isuka embonweni wokuthi ukusebenzisa izinto ezintsha kwandisa ubungozi, noma ngabe ulwazi oluthile lukhona.Abasebenzisi bavame ukubona i-HDPE njengomkhiqizo omusha wohlelo lwabo lokusebenza oluthile, ngaphandle kwendawo yabo yokunethezeka ngenxa yokuthi abanalo ulwazi ngayo.Umshayeli omkhulu uyadingeka ukukholisa izinsiza ukuze zizame izinto ezintsha nezinhlelo zokusebenza.Kuyathakazelisa futhi.
Indlela engcono kakhulu yokunqoba lezi zinkinga ezicatshangwayo ukusiza ukulinganisa ubungozi obubonakalayo futhi ubonise izinzuzo ezingalinganiswa zokusebenzisa izinto ezintsha.Futhi, kungasiza ukubheka umlando wemikhiqizo efanayo esetshenziswayo.Isibonelo, izinsiza zegesi yemvelo bezilokhu zisebenzisa amapayipi e-polyethylene kusukela maphakathi nawo-1960.
Nakuba kulula ukukhuluma mayelana nezakhiwo ezingokoqobo nezamakhemikhali zepayipi le-HDPE, indlela engcono yokusiza ukulinganisa izinzuzo zayo ukuchaza izakhiwo zayo ngokuhlobene nezinye izinto zamapayipi.Ocwaningweni lwezinsiza ezingu-17 zase-UK, abacwaningi baveze isilinganiso sokuhluleka esimaphakathi sezinto ezihlukene zamapayipi.Amazinga okuhluleka okumaphakathi ngamamayela angu-62 asukela ekuhlulekeni okungu-20.1 ekugcineni okuphezulu kwepayipi lensimbi kuya ekuhlulekeni okungu-3.16 ekugcineni okuphansi kwepayipi le-PE.Okunye okuthokozisayo okutholwe yilo mbiko ukuthi enye i-PE esetshenziswa emapayipini yenziwa eminyakeni engaphezu kwengama-50 edlule.
Namuhla, abakhiqizi be-PE bangakha izakhiwo ze-polymer eziqinisiwe ukuze bathuthukise ukumelana nokukhula okuhamba kancane, amandla aqinile, i-ductility, ingcindezi ye-hydrostatic evumelekile, nezinye izakhiwo zamapayipi.Ukubaluleka kwalokhu kuthuthukiswa akunakugcizelelwa.Phakathi neminyaka yawo-1980 kanye no-2000, inhlolovo yokwaneliseka kwezinkampani zezinsiza ngamapayipi e-PE yashintsha kakhulu.Ukwaneliseka kwamakhasimende kwanda cishe ku-53% ngeminyaka yawo-1980, kwenyuka kwaya ku-95% ngeminyaka yo-2000.
Izizathu eziyinhloko zokukhetha impahla yepayipi le-HDPE lamapayipi amakhulu okudlulisa ububanzi zihlanganisa ukuguquguquka, amalunga ahlanganayo, ukumelana nokugqwala, ukuhambisana nezindlela zobuchwepheshe ezingenazintambo ezifana nokubhola okuqondisayo okuvundlile, nokonga izindleko.Ekugcineni, lezi zinzuzo zingatholakala kuphela lapho kulandelwa izindlela ezifanele zokwakha, ikakhulukazi i-fusion welding.
Izinkomba:https://www.rtfpipe.com/news/large-diameter-hdpe-pipe-for-municipal-piping-systems.html
Isikhathi sokuthumela: Jul-31-2022
