Ukukhetha izinto ezifanele zokubopha ipayipi lomlilo kuyisinqumo esibalulekile konjiniyela bokuphepha komlilo kanye nezikhulu zokuthenga ezimbonini. Izinto zokubopha ipayipi zithinta ngqo ukuqina kwepayipi, isisindo, ukusebenza kahle kokugeleza kwamanzi, kanye nokumelana nezinto ezicindezela imvelo. Njengamanje, i-Polyvinyl Chloride (PVC) kanye ne-Polyurethane (PU) zimelela izinto ezimbili ezivame kakhulu zokubopha ipulasitiki ezisetshenziswa ekulweni nomlilo kanye nokukhishwa kwezimboni. Nakuba zombili izinto zisebenza ukuvimbela ukuvuza futhi zenze kube lula ukuthuthwa kwamanzi, izakhiwo zazo zomzimba ngaphansi kwezimo ezimbi kakhulu zihluka kakhulu, zithinta izindleko zomjikelezo wokuphila kanye nokusebenza kahle kwezinhlelo zokuvikela umlilo.

Ukwakheka Kwezinto Nezici Zomzimba Zamapayipi Omlilo Ane-PVC

I-Polyvinyl Chloride (PVC) iyi-polymer yepulasitiki yokwenziwa esetshenziswa kakhulu ekukhiqizeniipayipi lomlilo elijwayelekileimikhiqizo ngenxa yemvelo yayo engabizi kakhulu kanye nokuqina kwamakhemikhali. Izendlalelo ze-PVC zivame ukuba zinkulu kunezinye izindlela ze-PU ukuze kufezwe izilinganiso ezifanayo zokucindezela kokuqhuma. Lokhu kukhulu kunegalelo esisindweni esinzima sonke, okungase kwandise isikhathi sokufakwa ngesikhathi sokuphendula okuphuthumayo. Kodwa-ke, i-PVC ikhombisa ukumelana okuhle kakhulu namakhemikhali namafutha ahlukahlukene, okwenza kube inketho esebenzayo yokukhipha okuyisisekelo kwezimboni kanye nokunisela kwezolimo lapho ukuguquguquka okukhulu emazingeni okushisa aphansi kungeyona imfuneko eyinhloko.

Izinzuzo Zobuchwepheshe Zamapayipi Omlilo Ane-Polyurethane (PU) Lined

I-Polyurethane (PU) iyi-elastomer esebenza kahle kakhulu enikeza isilinganiso samandla nesisindo esiphezulu uma kuqhathaniswa nama-polymer endabuko.Ipayipi lomlilo elinophahla lwe-PU, ulwelwesi lungakhiqizwa lube luncane kakhulu ngenkathi lugcina amandla aphezulu okudonseka kanye nokumelana nokuhuzuka. Idatha evela ku-Inhlangano Kazwelonke Yokuvikela Umlilo (i-NFPA)kusikisela ukuthi ukunciphisa isisindo semishini yomlilo kuhlobene ngqo nokukhathala okuncishisiwe kwabacimi bomlilo kanye nezikhathi zokuphendula ezithuthukisiwe. Ama-PU linings ahlala eguquguquka kakhulu ngisho noma amazinga okushisa aphansi njengo-50°C, umkhawulo lapho i-PVC ivame ukuba buthakathaka futhi ithambekele ekuqhekekeni.

Ukuqhathanisa Ukusebenza Kahle Kokugeleza Kwamanzi Nokulahlekelwa Kokungqubuzana

Ukulahlekelwa ukungqubuzana kuyisici esibalulekile ekusebenzeni kahle kwe-hydraulic, njengoba kulawula ingcindezi etholakala ku-nozzle. Ama-lining e-polyurethane aklanywe ngendlela yokuthi abe bushelelezi kakhulu, okuholela ku-coefficient ephansi ye-Manning's roughness uma kuqhathaniswa ne-PVC. Ukungqubuzana okuphansi kwangaphakathi kuvumela amazinga aphezulu okugeleza (GPM) emabangeni amade ngaphandle kokudinga amandla engeziwe okupompa. Ekucindezelweni komlilo wesakhiwo esiphakeme, kusetshenziswa i-ipayipi lomlilo elinomfutho ophezulunge-PU lining iqinisekisa ukuthi ukulahlekelwa kokungqubuzana kuncishisiwe, okulondoloza amandla okuhamba komfudlana wamanzi ukuze kungene ilangabi ngempumelelo.

Ukuqina Kwemvelo kanye Nezilinganiso Zokumelana Nokuguguleka

Ijazi langaphandle lepayipi lomlilo linikeza ukuqina kwesakhiwo, kodwa ulwelwesi lwangaphakathi kumele lukwazi ukumelana nokukhula nokufinyela okuqhubekayo. Ulwelwesi lwe-PU lubonisa ukumelana okuphezulu kwe-ozone kanye nokuqina kwe-UV, okuvimbela izinto ukuthi zibole uma zivezwa elangeni noma ezingcoleni zezimboni iminyaka eminingana. Ngokusho kwezibalo zemboni ezivela ku-Ikusasa Locwaningo Lwemakethe (MRFR), imakethe yamapayipi omlilo emhlabeni wonke iya ngokuya ishintshela ku-TPU (Thermoplastic Polyurethane) ngenxa yokumelana kwayo nokuhuzuka okuphindwe kathathu kuya kahlanu uma kuqhathaniswa ne-PVC ejwayelekile. Lokhu kuqina kwenza i-PU ibe yisinqumo esikhethwayo se-ipayipi lomlilo lejakethi eliphindwe kabiliizakhiwo ezisetshenziswa ezindaweni ezinzima njengezimayini kanye namahlathi.

Ukuqhathaniswa kwamapayipi omlilo e-PVC vs. PU afakwe umugqa womlilo osetshenziswa embonini

Ithebula elilandelayo lifingqa izibalo zokusebenza kobuchwepheshe be-PVC kanye ne-PU linings ukusiza enkambisweni yokukhetha izinhlelo zokusebenza zezimboni kanye nezomasipala:

Inqubo Yokusebenza Yokuhlola Ubuqotho Bepayipi Lomlilo

Ukuqinisekisa ukuhambisana nezindinganiso zokuphepha njenge-NFPA 1962, abaphathi bezikhungo kumele balandele inqubo yokuhlola ehlelekile yabo bonkeimishini yokulwa nomliloUkugcina ubuqotho bolwelwesi kubalulekile ekuvimbeleni ukwehluleka okukhulu ngesikhathi somlilo.
1.

Ukuhlolwa Kwangaphandle Okubonakalayo: Hlola ijazi langaphandle ukuze ubone ukuthi kukhona yini amabala aqhekekile, ukusha, noma amabala amakhemikhali angabonisa umonakalo olwelwesini lwangaphakathi.

2.

Ukuhlolwa Kwangaphakathi Kwendwangu: Bheka ngepayipi ubheke emthonjeni wokukhanya ukuze uthole noma yikuphi ukuhlukaniswa noma ukungcola ngaphakathiukuxhumanisa ipayipi lomliloindawo.

3.

Ukuhlolwa Kokucindezela Kwe-Hydrostatic: Faka ipayipi ngaphansi kwengcindezi yokuhlola yesevisi yalo ekhethiwe ukuze uhlole ukuvuza noma "ukujuluka" ngejazi.

4.

Ukomisa Nokugcina Izinto: Qinisekisa ukuthi ipayipi likhishwe amanzi ngokuphelele futhi lomisiwe ngaphambi kokugingqika ukuze kuvinjelwe ukukhula kwesikhunta, okubaluleke kakhulu ezintweni ezisekelwe ku-PVC.

Ukuhlaziywa Kwezindleko Nezinzuzo Zokuthengwa Kokuphepha Komlilo Kwesikhathi Eside

Nakuba izindleko zokuqala zokuthenga ipayipi eline-PVC ziphansi, i-Total Cost of Ownership (TCO) ivame ukukhetha i-Polyurethane. Isikhathi eside senkonzo ye-PU—esivame ukuphindwe kabili kune-PVC—sinciphisa imvamisa yemijikelezo yokushintsha. Ngaphezu kwalokho, isisindo esincishisiwe samapayipi e-PU sivumela ukusetshenziswa kwamapayipi amancane, acinene kakhulu.ama-reels epayipi lomlilo, okusindisa isikhala esibalulekile ezinhlelweni zephansi zezentengiselwano. Ezinhlanganweni ezibeka phambili ukuthunyelwa okusheshayo kanye nokuthembeka kwesikhathi eside, ukutshalwa kwezimali ku-PU lining esezingeni eliphezulu kunikeza imbuyiselo ephezulu ngokusebenzisa imingcele yokuphepha ethuthukisiwe kanye nomsebenzi wokulungisa oncishisiwe.

Imibuzo Evame Ukubuzwa

I-PVC kanye ne-Polyurethane linings zihluke kanjani ekwakhiweni kwamakhemikhali kanye nomthelela emvelweni?

I-PVC (i-Polyvinyl Chloride) iyipulasitiki eqinile eyenziwe yaguquguquka ngokufaka ama-phthalates, angaphuma ngokuhamba kwesikhathi, okuholela ekuqineni kwezinto kanye nezinkinga ezingaba khona zemvelo. Ngokuphambene nalokho, i-Polyurethane (PU) iyi-elastomer ye-thermoplastic engadingi ama-plasticizers ukuthi ahlale eguquguquka. I-PU ngokuvamile ibhekwa njengenobungani nemvelo futhi izinzile, njengoba ingakhiphi umusi onobuthi ngesikhathi sokonakala kwezinga lokushisa eliphezulu ngezinga elifanayo ne-PVC. Ngokombono wobuchwepheshe, isakhiwo sama-molecule se-PU siyivumela ukuthi igcine ukuguquguquka ebangeni lokushisa elibanzi kakhulu kune-PVC.

Iyini inqubo yesinyathelo ngesinyathelo yokushintsha i-coupling yepayipi lomlilo eyonakele?

Okokuqala, ingxenye eyonakele yepayipi kumele inqunywe kahle kusetshenziswa umshini wokusika ipayipi onzima, ukuqinisekisa ukuthi ukusika kuqondile ngobude bepayipi. Okwesibili, okufaneleindandatho yokwandisa ipayipinoma i-clamp kumele ikhethwe ngokusekelwe kububanzi bangaphakathi bepayipi. Okwesithathu, i-coupling shank entsha ifakwa epayipini ize ihlale ngokuqinile ehlombe. Okwesine, ithuluzi lokunweba lisetshenziswa ukucindezela indandatho yethusi yangaphakathi ephepheni, okudala uphawu lokucindezela okuphezulu. Okokugcina, i-assembly kumele ihlolwe nge-hydrostatic ngengcindezi yokusebenza ephindwe ka-1.5 ukuqinisekisa ukuphepha kokuxhumeka ngaphambi kokubuyiselwa ekusebenzeni.

Ngingayikhetha kanjani i-lining efanele yepayipi lomlilo elisetshenziswa ezindaweni ezingaphansi kwe-zero?

Ezindaweni lapho amazinga okushisa ehla khona njalo ngaphansi kweqhwa, i-Polyurethane (PU) iyona kuphela indlela efanelekile yokukhetha. Ama-lining e-PVC adlula "ekushintsheni kwengilazi" emazingeni okushisa aphansi, abe lukhuni futhi abe buthaka; ukuzama ukuvula ipayipi le-PVC eliqandisiwe kuvame ukuholela ekuqhekekeni noma ekuhlukanisweni kwejazi lendwangu. Ama-lining e-PU ahlala ethambile futhi esebenza kahle aze afike ku--50°C (-58°F). Lapho bechaza ipayipi lezimo ezibandayo, abathengi kufanele baqinisekise isitifiketi esithi "Cold Bend Test" ngokwezindinganiso ze-UL noma ze-EN ukuqinisekisa ukuthi izinto zihlala zisebenza ezimweni zase-Arctic noma eziphakeme kakhulu.

Yimiphi imibono eyiphutha evamile mayelana nesisindo sepayipi lomlilo kanye nezilinganiso zokucindezela?

Umbono ovamile ongaqondile ukuthi ipayipi elisindayo nelijiyile linamandla ngokwemvelo noma liyakwazi ukubhekana nokucindezeleka okuphezulu. Kwisayensi yezinto zanamuhla, ukujiya akusho ukuthi linamandla. Amajakethi e-polyester aqinile ahlanganiswe nama-linings e-PU amancane, aqinile angafinyelela ukucindezeleka okudlula i-900 PSI (62 Bar) ngenkathi enesisindo esingaphansi ngo-30% kunepayipi le-PVC elijwayelekile. Omunye umbono ongaqondile ukuthi wonke amapayipi “epulasitiki” ayafana; empeleni, ubuningi bama-molecule e-polymer kanye nenqubo yokubopha phakathi kwe-lining nejakethi kunquma ikhono lepayipi lokumelana “nokugwazwa” ngaphansi kokucindezeleka okuphezulu.

Yiziphi izincazelo zedatha ezijwayelekile zepayipi lomlilo elinomugqa we-PU osezingeni lobuchwepheshe?

Ipayipi elinophahla lwe-PU lobuchwepheshe livame ukuba nengcindezi yokusebenza engu-250-300 PSI kanye nengcindezi eqhumayo okungenani engu-750-900 PSI. Ubukhulu bendwangu buvame ukugcinwa buphakathi kuka-0.2mm no-0.4mm ukuze kulinganiswe isisindo nokuqina. Ngokusho kwedatha evela ku-Izindinganiso zaseBrithani (BS 6391), Amapayipi ohlobo lwe-3 (ahlanganisa izembozo ze-PU noma ama-lining) kumele abonise isisindo esiphezulu esingaba ngu-250g kuya ku-350g ngemitha ngayinye ububanzi obungu-45mm. Ngaphezu kwalokho, amandla okunamathela phakathi kwe-lining kanye nendwangu kumele adlule ama-lbs angu-10/intshi ukuvimbela ukuhlukana ngesikhathi sokushintshashintsha kwengcindezi okusheshayo.