Ipayipi le-HDPE lisho ipayipi le-polyethylene elakhiwe-ngenhlaka ephezulu ye-polyethylene resin, ngokuvamile ehlinzekwaPE80, PE100, noma PE4710amabanga esevisi{0}ekalwe ngengcindezi. Uma kuqhathaniswa nepayipi le-PE elijwayelekile, ipayipi le-HDPE linikeza amandla aphakeme-kuya{3}}isilinganiso sokuminyana, ukusebenza okuthuthukisiwe{4}kwesikhathi eside se-hydrostatic, nokumelana okungcono ekukhuleni okunensayo kokuqhekeka, okulenza libe yinketho evamile emanzini, igesi, nokudluliselwa koketshezi lwezimboni.
Ipayipi le-HDPE
Idizayini Eqinile: Ipayipi le-PE lihlangana ne-ASTM D3035/F714/AWWA C906 yamasistimu amanzi, lisebenzisa i-PE4710 iminyaka engu-50+ yokuphila e-Latin America.
Amabanga Nezilinganiso: PE4710 nge-SDR11-17; ukumelana nokuqhekeka okuphezulu nokuvikelwa kwe-UV.
Osayizi: OD 4-8 in, ukubekezelela ±0.5% OD, +12% udonga; ubude bangokwezifiso buyatholakala.
I-QA: I-Hydrostatic/NDT ihloliwe, i-MTC 3.1, izinketho ze-TPI zokuthobelana.
Ukunikezwa: Ama-SDR amasheya/angokwezifiso, ama-fusion kits
Amabanga Nezilinganiso: PE4710 nge-SDR11-17; ukumelana nokuqhekeka okuphezulu nokuvikelwa kwe-UV.
Osayizi: OD 4-8 in, ukubekezelela ±0.5% OD, +12% udonga; ubude bangokwezifiso buyatholakala.
I-QA: I-Hydrostatic/NDT ihloliwe, i-MTC 3.1, izinketho ze-TPI zokuthobelana.
Ukunikezwa: Ama-SDR amasheya/angokwezifiso, ama-fusion kits
Thumela ukuPhenya
Isingeniso Somkhiqizo
UmhlanganoI-ASTM D3035, I-ASTM F714, futhiAWWA C906amazinga, ipayipi le-Octal polyethylene liphatha amakilasi okucindezela afika ku-200 psi ngokuqina{1}}kwesikhathi eside. I-Octal Pipe ihlinzeka ngesitoko ngamazinga aphezulu-okusebenza, ibhekana nezinselele zengqalasizinda yesifunda njengokuzamazama komhlaba kanye nenhlabathi eqinile.
Ukuhambisana Namazinga
Lapho ukhetha i-HDUsayizi wepayipi le-PE, onjiniyela bavamise ukukhiya izinto ezintathu kuqala:Uchungechunge lwe-OD (IPS/DIPS), I-SDR, kanye nethagethiisigaba sokucindezela. Kumaphrojekthi we-waterworks ngaphansi kwe-AWWA C906, i-SDR "iyindlela yokudayela amandla" (isibonelo,I-SDR11 ivamise ukusetshenziselwa amakilasi angama-psi angama-200), kuyilapho ukubekezelelana nokulawulwa kodonga kunquma ukufana kwenkambu kanye{0}}nokwethembeka kwesikhathi eside.
I-HD yethuIpayipi le-PEihambisana nayoI-ASTM D3035kwe-DR-ikaliweamapayipi,I-ASTM F714ngamadayimitha amakhulu, kanyeAWWA C906kwezicelo ze-waterworks kusuka ku-4 kuya ku-65 in. Materials likeI-PE4710qinisekisa amandla aphezulu e-hydrostatic, ehambisana ne-ISO 4427 kumaphrojekthi wamazwe ngamazwe aphuzwayo kanye nendle eLatin America.
Usayizi Wepayipi le-HDPE (OD, SDR & Pressure Class)
Ngezansi kukhona aokusheshayo,{0}}okujwayelekile{0}okusetshenziswa isifinyezo sikasayizi we-IPSekhombisaI-OD yangempelafuthiubuncane bodonga obukhuluokweDR11futhiDR17, kanye nokujwayelekileIsilinganiso sokucindezela kwe-PE4710ireferensi.
Landela ukulinganisa kwe-IPS/DIPS ngokubekezelelana kwe-OD okungu-±0.5% nodonga +12%/-0%. Amanani e-SDR abeka izilinganiso zokucindezela; I-SDR11 ye-200 psi ejwayelekile. Ubude 12-15m; I-13.5m yevelu emaphakathi yezibalo zesitoko.
Isitoko singenileI-PE4710kuwo wonke ama-SDR, izisindo nge-0.95 g/cm³ ukuminyana, +1.8% elungiswe-eyokugcina ngesilinganiso. Osayizi bangokwezifiso ngesicelo.
| Usayizi Wamagama (in) | I-OD (in/mm) | I-SDR | I-Min Wall (in/mm) | Ubude (m) | Izingcezu | Isisindo (MT) |
|---|---|---|---|---|---|---|
| 4 | 4.50 / 114.3 | 17 | 0.265 / 6.73 | 13.5 | 120 | 5.2 |
| 4 | 4.50 / 114.3 | 11 | 0.409 / 10.39 | 13.5 | 100 | 7.6 |
| 4 | 4.50 / 114.3 | 9 | 0.500 / 12.70 | 13.5 | 80 | 9.1 |
| 6 | 6.625 / 168.3 | 17 | 0.390 / 9.91 | 13.5 | 90 | 11.3 |
| 6 | 6.625 / 168.3 | 11 | 0.602 / 15.29 | 13.5 | 70 | 16.5 |
| 6 | 6.625 / 168.3 | 9 | 0.736 / 18.69 | 13.5 | 60 | 19.8 |
| 8 | 8.625 / 219.1 | 17 | 0.507 / 12.88 | 13.5 | 60 | 18.4 |
| 8 | 8.625 / 219.1 | 11 | 0.784 / 19.91 | 13.5 | 50 | 26.9 |
| 8 | 8.625 / 219.1 | 9 | 0.958 / 24.33 | 13.5 | 40 | 32.1 |
Amadokhumenti okuhlola (MTC 3.1/3.2, imibiko ye-NDT) atholakala uma eceliwe.
| Usayizi Wamagama we-IPS | I-OD yangempela (ku / mm) | I-DR11 Min Wall (in / mm) | I-DR17 Min Wall (in / mm) | Isilinganiso sokucindezela esijwayelekile se-PE4710* |
|---|---|---|---|---|
| 2" | 2.375 / 60.32 | 0.216 / 5.49 | 0.140 / 3.56 | DR11200 psi/ DR17125 psi(ISCO Industries) |
| 3" | 3.500 / 88.90 | 0.318 / 8.08 | 0.206 / 5.23 | DR11200 psi/ DR17125 psi(ISCO Industries) |
| 4" | 4.500 / 114.30 | 0.409 / 10.39 | 0.265 / 6.73 | DR11200 psi/ DR17125 psi(ISCO Industries) |
| 6" | 6.625 / 168.27 | 0.602 / 15.29 | 0.390 / 9.91 | DR11200 psi/ DR17125 psi(ISCO Industries) |
| 8" | 8.625 / 219.07 | 0.784 / 19.91 | 0.507 / 12.88 | DR11200 psi/ DR17125 psi(ISCO Industries) |
| 10" | 10.750 / 273.05 | 0.977 / 24.82 | 0.632 / 16.05 | DR11200 psi/ DR17125 psi(ISCO Industries) |
| 12" | 12.750 / 323.85 | 1.159 / 29.44 | 0.750 / 19.05 | DR11200 psi/ DR17125 psi(ISCO Industries) |
Ukubunjwa Kokubalulekile kanye Nezakhiwo Zemishini
Ipayipi le-HDPEisebenzisa-i-density resin ngeI-ASTM D3350ukuhlukaniswa kwamaseli, njenge-445574C, ukumelana nokuqhekeka nokucindezeleka kwemvelo.
| Impahla | Intengo ye-PE4710 | Indlela Yokuhlola |
|---|---|---|
| Ukuminyana (g/cm³) | 0.941-0.955 | I-ASTM D1505 |
| I-Melt Index (g/10 min) | <0.15 | I-ASTM D1238 |
| I-Flexural Modulus (psi) | 110,000-160,000 | I-ASTM D790 |
| Amandla Aqinile at Yield (psi) | >3,500 | I-ASTM D638 |
| Isisekelo Sokuklama I-Hydrostatic (psi ku-73℃F) | 1,600 | I-ASTM D2837 |
| I-Slow Crack Growth Resistance (amahora) | >10,000 | I-ASTM F1473 |
Lezi zibaluli zinika amandla impilo yesevisi ngaphezulu kweminyaka engama-50, nezithasiselo zokuvikela i-UV ekusetshenzisweni okungaphezulu komhlaba.
FDPE Pipe vs PE Pipe: Kusho ukuthini Imigomo
Ipayipi le-PE vs ipayipi le-HDPEngokuvamile umbuzo wamatemu.I-PEichaza umndeni we-polyethylene, ngenkathiI-HDPEyisigaba esiphezulu-sokuminyana phakathi kwe-PE esicaciswa kakhulu amapayipi omfutho. Ngamanye amazwi, iningi "amapayipi okucindezela kwe-PE" asetshenziswa emanzini kanye namanethiwekhi okusetshenziswayo empeleni enziwa kusukela kumabanga we-HDPE resin.
Ngokombono wokuthenga, okubalulekile akuyona ilebula kodwa yii-resin grade kanye nokuhlukaniswa kokusebenza. Isibonelo, iphrojekthi ingase idinge isigaba sezinto ezibonakalayo njengeI-PE4710(okuvame ukubhekiselwa kuyo eNyakatho Melika) ngoba ibonisa-ukusebenza kwamandla e-hydrostatic yesikhathi eside futhi isekela izigaba zokucindezela okuphezulu ku-SDR ethile. Yingakho futhi ikhotheshini ethi kuphela "ipayipi le-HDPE" ingase ingaphelele-abathengi ngokuvamile badinga izinga le-resin, i-SDR, kanye nezinga elibusayo ukuze bahlole ukulingana.
Kuleli khasi, umkhiqizo uyingcindezi-uhlelo lwe-HDPE/PE olulinganiselwe oluhambisana namazinga ajwayelekile e-waterworks njengeI-ASTM D3035, I-ASTM F714, futhiAWWA C906. Lawo mazinga achaza ukuthi ipayipi lilinganiswa kanjani, lihlolwe, limakwa kanjani, futhi likhishwe kanjani{1}}ukuze i-"PE vs HDPE" ibe yisinqumo esisebenzayo mayelanaukuthobelana + ukukala ingcindezi + imibhalo elandelekayo, kunegama lokumaketha.
Ipayipi le-PE vs PPR: Ungakhetha Kanjani Ngesevisi
NgobaIpayipi le-PE vs PPR, isinqumo ngokuvamile simayelana nezinga lokushisa lesevisi nendlela yokufaka: Ipayipi lomfutho we-PE livame ukukhethwa kumapayipi okusabalalisa agqitshiwe kanye nokugijima kwangaphandle okude (ukuhlanganisa-okuhlanganisiwe, ukunyakaza-kuyabekezelela), kuyilapho i-PPR ivame ukusetshenziselwa ukwakha amasistimu amanzi ashisayo/abandayo anezinqubo zokujoyina ezihlukene kanye namazinga okusebenza (isb, i-ISO 15874 ivame ukubhekiselwa kumasistimu e-PPR). Qondanisa okokusebenza nomsebenzi kuqala, bese uqinisekisa iphakheji yokujoyina nesitifiketi ngaphambi koku-oda.
Ipayipi le-HDPE lisetshenziselwa ini?
Amapayipi e-HDPE asetshenziswa kakhulu kumanethiwekhi amanzi anomfutho ngenxa yokuthi ahlala ethembekile ezimeni eziqondile zesayithi ezivame ukudala ukuvuza: ukugijima kwemisele emide, ukubopha{0}}okujwayelekile, nezigaba ebona ukunyakaza okuncane ukusuka endaweni yokuhlala noma ukulayishwa kwethrafikhi. On anUbubanzi bokuvuselela umasipala waphesheya e-Dubai (UAE), usonkontileka wathatha indawo yokugugaI-DN200–DN400umshini wokuhambisa amanzi ngasemhubheni ophithizelayo oseceleni komgwaqo lapho umsebenzi wawulinganiselwe khonaebusuku-shintsha amawindingomnqamulajuqu oqinile{0}wokuvula kabusha. Inzuzo ebonakalayo kwakungeyona "ipulasitiki uma iqhathaniswa nensimbi" ngokombono-kwakuyilokhobutt-amalunga ahlanganisiwekuncishiswe amaphoyinti okuvuza komshini phakathi nokuhlolwa kwengcindezi okuhlukaniswe izingxenye, ngakho-ke ukugunyazwa kungase kuqhubekele phambili isigaba-nge{1}}sesigaba ngaphandle kokujaha ukugeleza okuncane ekuhlanganisweni ngemva kokugcwalisa emuva. Kulolu hlobo lohlelo, i-Octal Pipe ngokuvamile ihlinzeka ngepayipi njengephakheji echaziwe (usayizi + SDR + isigaba sokucindezela) ngokumaka inkatho ecacile, ngakho isayithi le-QA lingakwazi ukuvumelanisa irekhodi lokuhlola ingcindezi kulokho okufakiwe.
Ipayipi le-HDPE liphinde likhethwe lapho indlela yokufaka ishayela isinqumo sezinto ezibonakalayo. On anIphakheji yokuwela i-HDD eduze kwase-Rotterdam (Netherlands)olayini wokudlulisa amanzi omfushane ngaphansi komsele, umakhi ubedinga ukudonsa{0}}ngochungechunge olunolawulo lwe-OD olubikezelwayo ukuze ipayipi likwazi ukudlula amarola futhi liqondise amafreyimu kahle ngesikhathi sokuhlehla, ngaphandle kokuhlehla noma ukuphoqa ukusebenza kabusha emgodini wokungena. Iqembu livale i-scope ngaphambili ngokuthi "usayizi + SDR + indlela yokujoyina," kuhlanganiswe kusetshenziswa amapharamitha arekhodiwe ukuze kulandeleke, kanye nenkambu egxilile ye-QA ekuhlolweni kobuhlalu kanye nokwamukelwa kwe-hydrotest{0}}kunokuphatha amajoyinti anentambo/avulekile ngaphakathi kwebhore elivinjiwe lapho ukufinyelela kukhawulelwe khona futhi ukulungisa kubiza.
Ukuthuthukiswa kokusatshalaliswa kwegesi ngoxhumo lwesevisi (igesi-izindaba zokuthobela okujwayelekile):
Igesi yepayipi le-HDPEizicelo zibuswa amazinga ahlukene kanye logic ukwamukela kunezintambo zamanzi aphuzwayo. Ngokudluliswa/ukusabalalisa kwegesi kaphethiloli, imininingwane evamise ukubhekisela kuyoI-ASTM D2513kanye/nomaISO 4437 / EN 1555(ngokuya ngesifunda kanye nezidingo zomsebenzisi). Ukulawula ukuthengwa kwempahla okuyinhloko ukucaphuna nokuqinisekisa ipayipi ngokucacile njengokuthi "isevisi yegesi" (izinga + elijwayelekile + lokumaka + ububanzi bokuhlola), esikhundleni sokuthatha{4}}isitifiketi se-PE sebanga lamanzi singasetshenziswa kabusha.
I-HDD/ukuwela okuyisicefe lapho kudingeka khona iyunithi yezinhlamvu eqhubekayo yokudonsa:
Ekuweleni komsele we-Octal Pipe HDD, usonkontileka wayedinga intambo ende eqhubekayo ene-OD ezinzile ukuze idlule amarola futhi iqondise ozimele ngokushelela. I-oda belikhiyiwe njengokuthi "usayizi + SDR/ikilasi lokucindezela + indlela yokujoyina," futhi inkambu ye-QA igxile kumapharamitha wokuhlanganisa, ukuhlolwa kobuhlalu, kanye ne-hydrotest-kunokulawula amalunga emishini amaningi ngaphakathi kwebhore eboshiwe.
Yenza amagama ayi-134 abe ngabantu
Ukuze uthole ukuthengwa, ukhiye ukuthenga ipayipi le-HDPE njengesistimu: qinisekisa isevisi (amanzi ngokumelene negesi), bese ucacisaUchungechunge lwe-OD/usayizi, i-SDR/ikilasi lokucindezela, izinga le-resin lapho kudingeka, kanye nezinga/indlela yokuhlanganisa. Lowo umehluko phakathi kokukhishwa kwesayithi okushelelayo nomsebenzi ozinzile ngenxa yokuthi ipayipi elithi "PE" egameni kodwa aliqondanisiwe nesigaba sokucindezela, inqubo yokujoyina, noma imibhalo elindelwe ngumhloli.
I-HDPE Pipe Production Line & Quality Assurance
Inqubo Yokukhiqiza Amapayipi e-HDPE
Ukukhiqizwa kwepayipi le-HDPE kuqala ngokukhipha inhlaka ye-polyethylene ephezulu-enobukhulu obukhulu, ehlanganisa ukusabalalisa kwesisindo se-bimodal kumamaki e-PE4710 ukuze kuthuthukiswe ukuqina nokumelana nokuqhekeka. Ukulandela ukukhishwa, amapayipi angaphansi kokuhlolwa kwe-hydrostatic okuqinile nge-AWWA C906 ngayinye izikhathi ezingu-1.5 isigaba sokucindezela, kanye nokuhlolwa kwe-ultrasonic ukuze kuqinisekiswe ukufana kodonga nokuthola noma yikuphi ukukhubazeka. Izilawuli zekhwalithi ezibanzi zifaka i-positive material identification (PMI), ukuqinisekiswa kwe-dimensional okunembe, kanye nokuhlola okuqhumayo ukuze kuqinisekiswe ubuqotho besakhiwo. Izitifiketi zokuhlolwa kwe-Mill (i-MTC nge-EN 10204 3.1) zihlinzeka ngamarekhodi anemininingwane wamaqoqo e-resin, amapharamitha e-extrusion, kanye{8}}nemiphumela yokuhlola okonakalisayo (NDT), kuyilapho{9}}ukuhlolwa okuvela eceleni okuvela kuma-ejensi afana ne-SGS noma i-BV kutholakala kalula ukuze kuqinisekiswe okwengeziwe.
Ukwamukelwa Kwenkundla Ngaphambi Kokugcwalisa Ngemuva (Kungani Khetha Ipayipi le-Octal)
Amaphrojekthi amaningi wamapayipi e-HDPE awabambeki ngenxa yokuthi "i-PE inzima"-ayabambezeleka ngenxa yokuthi indawo yangaphambili ayikwazi ukugcwalisa kuze kube yilapho umhloli evala uhlu lokuhlola lokwamukelwa. I-Octal Pipe iphatha ukunikezwa kwe-PE njenge-khulula-iphakheji elungileyakhelwe eduze kwendlela imisele ehamba ngayo ngempela: izindawo zokulethwa, umsebenzi wokuhlanganisa, nezigaba ze-hydrotest kufanele zikleliswe ukuze ithimba lesayithi likwazi ukufakazela ukuthobela umthetho ngokushesha, hhayi ngemva kokuba ipayipi selivele liphansi.
- I-Fusion{0}}igxile ekusekelweni kokwamukela:Ukusebenza kwe-PE kuhlala ekuhlanganyeleni. Kumaphrojekthi afuna ukulawula okuqinile, i-Octal Pipe iqondanisa ububanzi bokunikezela kanye nokusebenza kwendawo ngokuqinisekisaindlela yokujoyina (i-butt fusion / electrofusion), ukuhambisana okufanelekile, nendlela yokwamukelangaphambili, ukuze amalogi ahlanganisiwe weqembu kanye nama-ID ahlanganyelwe abuyekezwe ngokumelene nesisekelo esijwayelekile ngaphandle kwezimanga "zendlela engalungile yokufakwa".
- Ukucaca kwe-Hydrotest ngaphambi kokufakwa:Siphusha isiyalo esilula sokuthenga: chazaimingcele yokuhlola, isikhathi sokubamba, kanye nemibandela yokwamukelakusenesikhathi (futhi uthumele ngenqwaba esekela lolo hlelo). Lokhu kuvimbela -isimo sesiteji sokusebenza kabusha sekwephuzile lapho isigaba kufanele siphinde sihlolwe{2}}ngoba izinto zokwakha kanye nokuhlelwa kokuhlola bekungaqondanisiwe.
- Ukufana kwezindonga nokuthembeka kwengcindezi:Ukusebenza kwengcindezi kusekelwe kumklamo{0}, kodwa ukwethembeka kwenkambu kuncike ekulawuleni udonga oluzinzile kanye nokukhipha okuhlanzekile. Kumapayipi amanzi kanye nezintambo ze-HDD, sigcizelela ukuvumelana kodonga ukuze kuncishiswe izindawo ezibuthakathaka eziba yizimanga ze-hydrotest.
- Ukuvikelwa kwendawo kanye nokubamba okuvimbela ukulimala okufihliwe:Ama-gouges kanye nokuklwebheka okujulile kungaba izindawo zokulahla ngaphambi kokugcwaliswa ngemuva. Sisebenzisa ukuvikela okusebenzayo kokupakisha/ukuqeda kanye neziqondiso zokusingatha ukuze kufike ipayipi nezigaba ezinezimangalo ezimbalwa zomonakalo kanye nokuncishiswa{1}}okumbalwa esizeni.
FAQ
Q: Ngikhetha kanjani usayizi wepayipi we-HDPE ofanele kanye ne-SDR?
A:Khetha ngeUchungechunge lwe-OD (IPS/DIPS noma i-metric) + SDRukuhlangabezana nesigaba sokucindezela esidingekayo;i-SDR ephansi=udonga olukhulu kakhulu=isilinganiso somfutho ophezulungaphansi kwezinga elibusayo.
Q: Iliphi ipayipi le-HDPE elisetshenziselwa amaphrojekthi wangempela?
A:Ngokuvamile isetshenziselwaamapayipi amanzi agqitshiwe, izixhumi zesevisi, kanye ne-HDD edonsa-ngezintambolapho amalunga okuhlanganisa kanye nokuguquguquka kusiza ukunciphisa amaphuzu avuzayo kanye nengozi yokufaka.
Q: Ipayipi le-PE vs ipayipi le-HDPE - uyini umehluko?
A:I-HDPE iyi-auhlobo lwe-PE(-i-polyethylene enamandla kakhulu). Iningi lokucindezela "amapayipi e-PE" amanethiwekhi amanzi/igesi yi-HDPE; ukukhetha kufanele kusekelweresin grade + SDR + standard, hhayi ilebula.
Q: Ingabe ipayipi le-HDPE lilungele isevisi yegesi?
A:Yebo, kodwa kuphela uma ku-odiwe futhi kuqinisekiswe ukuthiigesi{{0}amazinga esevisi(isb, i-ASTM D2513 / ISO 4437 / EN 1555 njengoba kusebenza) enomaka okulungile kanye nobubanzi bokuhlola-isitifiketi samanzi-sebanga lesitifiketi asishintsheki.
Izitifiketi
Isitifiketi se-CE
Isitifiketi se-ISO 9001
Isitifiketi se-API Q1
Isitifiketi se-ABS
Isitifiketi se-AP-5L
Isitifiketi se-API-5CT
Umkhiqizo:Ipayipi lomfutho we-PE (i-HDPE), etholakalayoamanzifuthiisevisi yegesi(ngokwezinga elisebenzayo)
Amabanga Abalulekile:I-PE80 / PE100;I-PE4710(lapho kushiwo khona)
Ibanga likasayizi:I-IPS/DIPS noma uchungechunge lwe-metric OD (amapayipi avamile asuka2"–24"; enkulu ngesicelo)
I-SDR / Ingcindezi:OkuvamileI-SDR 11 / SDR 17 / SDR 21(isigaba sokucindezela ngokwezinga ngalinye, izinga lokushisa, kanye nesici sokuklama)
Ubude:Ubude obuqondile (uhlobo.6–12 m) kanyeamakhoyiliosayizi abancane (ngesicelo)
Ukujoyina:I-Butt fusion / Electrofusion (efaniswa nokufakwa nesevisi)
Amazinga (Okuvamile):Amanzi-AWWA C906, ASTM D3035 / F714; Igesi-ASTM D2513, ISO 4437 / EN 1555 (njengoba kusebenza)
Amashadi ashisayo: Ipayipi le-hdHDPE, China hdHDPE Abakhiqizi bepayipi, abahlinzeki, imboni, ipayipi le-polyethylene, ipayipi le-ASTM D3035, AWWA C906 PE, ipayipi lamanzi laseLatin America
Ngaphambilini
Ipayipi Lensimbi YekhabhoniOkulandelayo2
Ipayipi Lensimbi EngagqwaliUngahle Uthande
Thumela ukuPhenya