Lapho abasebenzisi abaningi bekhethaAmapayipi e-PE, ngokuvamile kulula ukwenza amaphutha ngenxa yokungawuqondi ngokwanele.Abazi noma basebenzise amapayipi e-polypropylene angahleliwe noma amapayipi e-polyethylene kumaphrojekthi okulethwa kwamanzi esakhiweni.Uyini umehluko phakathi kwabo?Indwangu yovolo?Ake ngikwethule.
Amaphuzu abalulekile ami kanje:
Emanzini okuphuza, i-PE ngokuvamile isetshenziswa njengepayipi lamanzi abandayo;I-PPR (impahla ekhethekile yamanzi ashisayo) ingasetshenziswa njengepayipi lamanzi ashisayo;kukhona futhi i-PPR (impahla yamanzi abandayo) esetshenziswa njengeipayipi lamanzi abandayo;Uma kuyipayipi lamanzi ashisayo, vele i-PPR ingcono;(uma kuyipayipi lamanzi okuphuza lokuhlobisa ikhaya, ngakho-ke asikho isidingo sokuhlukanisa, ngokuyisisekelo i-PPR isetshenziswa ngaphezu kwe-PE)Uma wenza amapayipi amanzi abandayo, ungabheka umehluko olandelayo:
1. Ukuqhathaniswa kokumelana nokushisa phakathi kwepayipi lamanzi le-PPR kanyeIpayipi lamanzi le-PE.
Ngaphansi kokusetshenziswa okujwayelekile, ipayipi lamanzi le-PE linokushisa okuzinzile kwe-70 ° C kanye nezinga lokushisa elingu-30 ° C.Okusho ukuthi, ebangeni lokushisa elinjalo, ukusetshenziswa kwesikhathi eside kwamapayipi amanzi e-PE kuphephile futhi kunokwethenjelwa.
Ngaphansi kokusetshenziswa okujwayelekile, ipayipi lamanzi le-PPR linokushisa okuzinzile kwe-70 ° C kanye nezinga lokushisa elingu-10 ° C.Kubuye kubonise ukuthi kuleli banga lokushisa, ukusetshenziswa kwesikhathi eside kwamapayipi amanzi e-PPR nakho kuphephile futhi kuthembekile.Kuphetha ngokuthi amapayipi amanzi e-PE anokumelana okufanayo nokushisa okuphezulu njengamapayipi amanzi e-PPR.Kodwa-ke, amapayipi amanzi e-PE angcono kunamapayipi amanzi e-PPR ngokusebenza okuphansi kwezinga lokushisa.
2.umehluko phakathi kwamapayipi amanzi e-PE kanye namapayipi amanzi e-PPR ngokwenhlanzeko
Ingxenye eyinhloko yamangqamuzana amakhemikhali epayipi lamanzi le-PE yi-polyethylene.Abafundi abafunde i-organic chemistry bayazi ukuthi ukwakheka kwalo mkhiqizo ama-athomu ekhabhoni amabili ahlanganiswe nama-athomu e-hydrogen amahlanu, elinye lawo lihlanganiswe ne-athomu ye-carbon ngesibopho esiphindwe kabili, bese kuba i-ethylene I-molecule eyodwa ye-polymer yenziwa i-polymerized ngendlela ethile, futhi umkhiqizo onjalo ungumkhiqizo we-polyethylene.Ngakho liyini ipayipi lamanzi le-PPR?Ingxenye eyinhloko yepayipi lamanzi le-PPR yi-propylene, okungukuthi, ama-athomu e-carbon amathathu ahlanganiswe nama-athomu ayisikhombisa e-hydrogen, futhi i-athomu eyodwa ye-hydrogen ihlanganiswe ne-athomu ye-carbon enesibopho esiphindwe kabili, bese umkhiqizo owenziwe ngemuva kwe-polymerization ungumkhiqizo we-polypropylene.Imikhiqizo enjalo icishe ifane ngokuphathelene nenhlanzeko nokuphepha.Okubalulekile ukuthi izinto zokusetshenziswa ezisetshenziswa yibhizinisi ziyahlangabezana yini nezidingo, hhayi umehluko phakathi kwemikhiqizo emibili.Akunasisekelo futhi ukukhangisa ukuthi amapayipi amanzi e-PE ahlanzeke kakhulu kunamapayipi amanzi e-PPR emaphephandabeni.Wonke amapayipi amanzi e-PE afanelekile kanye nemikhiqizo yamapayipi amanzi e-PPR kufanele ahlolwe ukuthuthwa kwendle (ngaphandle kwaleyo mikhiqizo mbumbulu kanye nentula).Kuyinkohliso futhi kubathengi ukusho ukuthi amapayipi amanzi e-PE ahlanzekile futhi aphephile kunamapayipi amanzi e-PPR.
3. Imoduli ye-elastic
I-elastic modulus yepayipi lamanzi le-PPR yi-850MPa.Ipayipi lamanzi le-PE lingele-polyethylene e-medium density, futhi i-elastic modulus yayo imayelana nama-550MPa kuphela.Inokuvumelana nezimo okuhle nokungaqini okwanele.Isetshenziswa emkhakheni wokwakha amanzi.Hhayi muhle.
I-Thermal conductivity: Ipayipi lamanzi le-PPR lingu-0.24, ipayipi lamanzi le-PE lingu-0.42, elicishe liphindwe kabili ukuphakama.Uma isetshenziselwa ukushisa phansi, leli iphuzu layo eliqinile.Ukushisa okuhle kokushisa kusho ukuthi umphumela wokushisa ukushisa ungcono, kodwa usetshenziselwa amapayipi amanzi ashisayo.Ukungalungi ukuthi uma ukukhishwa kokushisa kuhle, ukulahlekelwa ukushisa kuyoba kukhulu, futhi izinga lokushisa elingaphezulu lepayipi lizoba phezulu, okulula ukulishisa.
4. Ukusebenza kwe-Welding
Nakuba kokubili amapayipi amanzi e-PPR kanye namapayipi amanzi e-PE angaba ashiselwe ashisayo, amapayipi amanzi e-PPR asebenza kalula, futhi ukuqhuma kwamapayipi amanzi e-PPR kuyindilinga, kuyilapho ukuvuleka kwamapayipi amanzi e-PE kungavamile futhi kulula ukuvinjelwa;izinga lokushisa lokushisela libuye lihluke, amapayipi amanzi e-PPR angama-260 ° C, amapayipi amanzi e-PE Izinga lokushisa liyi-230 ° C, futhi umshini wokushisela okhethekile wamapayipi amanzi e-PPR emakethe kulula ukuweld ngokweqile futhi kubangele ukuvuza kwamanzi.Ngaphezu kwalokho, ngenxa yokuthi impahla yamapayipi amanzi e-PE kulula ukuyikhipha, amathuluzi akhethekile kufanele asetshenziselwe ukukhipha isikhumba se-oxide ebusweni ngaphambi kokushisela, ngaphandle kwalokho ipayipi elihlanganisiwe ngempela alikwazi ukwakhiwa, futhi ipayipi ijwayele ukuvuza kwamanzi, ukwakhiwa kunzima nakakhulu.
5. Amandla womthelela wezinga lokushisa eliphansi:
Leli phuzu lingamandla wempahla yepayipi lamanzi le-PE ngokwezinkomba.Amapayipi amanzi e-PPR anamandla kunamapayipi amanzi e-PE, futhi amapayipi amanzi e-PE aguquguquka kakhulu kunamapayipi amanzi e-PPR.Lokhu kunqunywa ubunjalo bezinto ezibonakalayo, kodwa akunangqondo ukukhulisa i-brittleness ebandayo yamapayipi amanzi e-PPR., amapayipi amanzi e-PPR asetshenziswe e-China iminyaka engaphezu kweyishumi.Abakhiqizi baye banciphisa kancane kancane izingozi ezifihliwe ezibangelwa ukuphatha okungalungile ngokupakisha okuphumelelayo nokuqinisa ukukhangisa.Ukuphatha kanye nokwakhiwa okunonya kuzophinde kubangele amapayipi amanzi e-PE phezulu.Imihuzuko kanye nemifantu yokucindezeleka;uma isetshenziswa ngaphansi kwezimo eziphansi zokushisa, noma yiliphi ipayipi kufanele livalwe, ngaphandle kwalokho ukunwetshwa kwevolumu okubangelwa ukuqanda kuzokwenza ukuthi ipayipi liqandwe futhi liqhekeke.Ipayipi le-PPR liyipayipi elifanele lamapayipi amanzi okuphuza, futhi indawo yangaphandle ayilungile njengasendlini.Kusetshenziswa amapayipi e-PE, okubuye kube yinto efanelekile yamapayipi amakhulu amapayipi amanzi.
6. Usayizi wepayipi
Usayizi omkhulu ongenziwa ngepayipi le-PE ngu-dn1000, futhi ukucaciswa kwe-PPR kungu-dn160.Ngakho-ke, amapayipi e-PE asetshenziswa kakhulu njengamapayipi okukhipha amanzi, futhi amapayipi okuhambisa amanzi ngokuvamile ayi-PPR.
Isikhathi sokuthumela: Jun-30-2023
