Izi zokuklama ze-NSF/ANSI 61: Umhlahlandlela Wezobunjiniyela Wokuqonda Amanzi Aphuzwayo
Kwadalwa ngo 06.23
Izinga le-NSF/ANSI 61 Lokuklama Amanzi okuphuza: Umhlahlandlela Wezobunjiniyela Wokuphumelela Kwamanzi okuphuza
I-NSF/ANSI 61 ejwayelekile (Izingxenye Zesistimu Yamanzi okuphuza – Imiphumela Yezempilo) iyisilinganiso esibonakala emhlabeni wonke sokuqinisekisa ukuphepha kwezinto ezithinta amanzi okuphuza. Le ejwayelekile, eyathuthukiswa yiNational Sanitation Foundation (NSF) kanye ne-American National Standards Institute (ANSI), ilawula ngokuqinile inani lezinto ezingcolisa amanzi—njengezinto eziyingozi eziguquguqukayo (VOCs), amaminerali asindayo, kanye nama-phthalates—ezingaphuma ezintweni ezakhiwe zibe ngamanzi okuphuza. Ezitsheni zokugcina amanzi, emigqeni yemishayo, kanye nezingubo zazo, ukuthobela i-NSF/ANSI 61 kuyimfuneko eyisibopho sezomthetho nezobunjiniyela.
1. Isibopho Sezinga Emisebenzini Yamanzi
I-NSF/ANSI 61 ayihloleli ukusebenza komkhiqizo; esikhundleni salokho, ikala kuphela imiphumela yayo kwezempilo. Noma yimaphi impahla ethinta amanzi okuphuza kusukela emthonjeni kuya empompini ingaphansi kwesibopho sayo.
Ezindaweni zokugcina ezinkulu kanye nezokwelapha, izinga lihlolela ngokuqinile:
● Izendlalelo Zokuvikela: Kubandakanya i-Glass-Fused-to-Steel (GFS) enamel esetshenziswa efektri, i-Fusion Bonded Epoxy (FBE), kanye ne-polyurethanes esetshenziswa ensimini.
● Izinto Zokuhlanganisa: Amagasketi, ama-O-ring, kanye nama-mastics asetshenziselwa ukuhlanganisa amathangi ensimbi ahlanganiswe ngezikulufu.
● Amapayipi Namavalvu: Ins simbi, i-PVC, insimbi eqinile, kanye nezingxenye ezihambisanayo.
● Imidiya Yenqubo: Isihlungi sesihlabathi, i-carbon esebenzayo, kanye ne-ion-exchange resins.
2. Inqubo Yokuhlola kanye Nokuqinisekisa
Ukuthola isitifiketi se-NSF/ANSI 61 kuyahlolwa okunzima, okunezinyathelo eziningi zokuhlolwa kwe-toxicological. Abakhiqizi abakwazi ukuziqinisekisa "ngokwabo"; kufanele bahlolwe yilebhu ezimele egunyaziwe.
A. Ukubuyekezwa Kwefomula
I-Toxicologists ibuyekeza ifomula ephelele ye-chemical yomkhiqizo, okubandakanya izithako zobunikazi ezivela kubahlinzeki bezinto ezibonakalayo. Zibona noma yimaphi amakhemikhali alawulwayo futhi zinqume ukuthi yiziphi izinto ezingcolisa kumele zihlolwe.
B. Ukuhlolwa Kokukhipha (Ukudonsa)
Umkhiqizo ubekwa ekubeni nasezinhlanganisweni zamanzi ezenziwe ngabantu eziklanyelwe ukulingisa izimo ezahlukahlukene ezinzima emhlabeni wangempela (isibonelo, amazinga ahlukahlukene e-pH, ubulukhuni, namazinga okushisa). Amanzi bese ahlaziywa kusetshenziswa i-mass spectrometry ethuthukisiwe ukuthola amazinga amancane we:
● Izinsimbi ezisindayo (Isikhokho, i-Arsenic, i-Cadmium, i-Chromium)
● Amakhemikhali e-Organic asheshayo (VOCs)
● Amakhemikhali e-Organic asheshayo kancane (SVOCs)
● Ama-Radionuclides
C. Ukuhlolwa Kwe-Toxicological
Ukwanda kwezinto ezikhiphayo kuqhathaniswa namazinga aphezulu kakhulu achazwe ngokucacile (MCLs) abekwe yi-EPA kanye ne-Health Canada. Uma amazinga akhishiwe engaphansi kwemingcele evunyelwe, umkhiqizo uyaphumelela.
3. Isiqhathaniso: NSF-61 vs. NSF-372
Amaphrofesa okuthenga avame ukuhlangabezana nalezi zindinganiso lapho ethenga izinto zamaphrojekthi amanzi okuphuza. Kubalulekile ukuqonda umehluko.
Isici | NSF/ANSI 61 | NSF/ANSI 372 |
Okugxilwe Kukho Kokuqala | Imiphumela ephelele yezempilo / Konke okuvimbayo | Okuqukethwe yi-lead kuphela |
Indlela Yokuhlola | Ukuhlolwa kokukhipha amakhemikhali (ukukhipha) | Ukuhlaziywa kokwakheka kwezinto |
Imithetho Yokudlula/Ukuhluleka | Okuvimbayo akudluli imingcele ye-toxicological | Okuqukethwe yi-lead sekukonke kungaphansi kwe-0.25% |
Isicelo | Ama-coatings, ama-sealants, amathangi, amapayipi, imidiya | Ama-brass fittings, izinto zokugeza, ama-valves |
Ukuncika | Isitifiketi esiphelele esizimele | Ngokuvamile kudingeka kanye ne-NSF-61 |
4. Izidingo zobunjiniyela zamathangi okugcina
Lapho udizayina noma uthenga amathangi okugcina amanzi okuphuza, ukusho nje ukuthi ithangi "liyahambisana ne-NSF" akwanele. Onjiniyela kufanele baqinisekise amapharamitha athile:
● Isilinganiso Sokubaleka Kwendawo Nokuqina Komthamo: Uphahla oluqinisekisiweyo lwethangi elingamalitha ayisigidi lunokungaqinisekiswa kwethangi elingamalitha angama-500. Amatafulethi amancinci anesilinganiso esiphakeme sokubaleka kwendawo nokuqina komthamo, okwandisa ukugxila kwezinto ezingahle zivuzayo. Isiqinisekiso sihlala sichaza umthamo omncane wethangi umkhiqizo ogunyazelwe wona.
● Izikhathi Zokuqina Nokushisa: Kumacansi e-epoxy namacansi asetshenziswa ensimini, isiqondiso sibeka izimo zokuqina eziqondile. Uma ithangi libekwa ekuqalisweni kwenkonzo ngaphambi kokuba kudlule isikhathi sokuqina esishiwo, isitifiketi se-NSF-61 siba yize lobuchwepheshe, futhi ingozi yokuvuza kwe-VOC iyanda.
● Izimpawu Nezinto Zokwakha: Ematafuleni ahlanganisiwe, amaphaneli ensimbi angahambisana (isibonelo, i-GFS engasebenzi), kodwa i-polyurethane sealant ethile noma izinsimbi zikagumeni ezisetshenziswa emalungeni kumele futhi zibe nesitifiketi sazo esizimele se-NSF-61.
5. Imibuzo Evame Ukubuzwa (FAQ)
Q: Ingabe i-NSF/ANSI 61 iyadingeka ngokomthetho?
A: Yebo, eNyakatho Melika. Cishe zonke izifundazwe zase-U.S. nezifundazwe zaseCanada zidinga izingxenye zesistimu yamanzi okuphuza ukuthi zihambisane ne-NSF-61. Ngaphezu kwalokho, amaphrojekthi aphesheya eMiddle East, eNingizimu-mpumalanga Asia, naseLatin America ngokwanda kwamukela i-NSF-61 njengesibonelo sabo esiyisisekelo sokuphepha kwezempilo yomphakathi.
Q: Ingabe ithangi lensimbi engagqwali (stainless steel) lidinga isitifiketi se-NSF-61?
A: Nakuba insimbi engagqwali yohlobo lwe-304 kanye ne-316 ingaphephile ngokwemvelo futhi ingavamile ukukhipha izinto ezingcolisa amanzi, umhlangano ophelele wetangi—okuhlanganisa nanoma yiziphi izinto zokubopha ezisetshenzisiwe, amakhemikhali okuhlanzwa/okuvikela, kanye nezinto zangaphakathi zamagasketi—kusadingeka ukuthi kuhlolwe yi-NSF-61 ukuqinisekisa ukuthi uhlelo lonke luphephile ukusetshenziswa emanzini okuphuza.
Q: Umkhiqizo kufanele uphinde uthuthukiswe isitifiketi kangaki?
A: Ukuthola isitifiketi akuyona into eyenzeka kanye. Abakhiqizi kumele bahambele izivivinyo zonyaka ezingaziswanga zezindawo zabo kanye nokuhlolwa kabusha kwemikhiqizo yabo ukuze bagcine uhlu lwabo lwe-NSF, beqinisekisa ukuthi imithombo yezinto zokwakha kanye nezinqubo zokukhiqiza azikaze zihlukane nendlela eyayigunyazwe ekuqaleni.
I-NSF/ANSI 61 iyisivikelo esikhulu phakathi kokukhiqizwa kwezimboni nempilo yomphakathi. Ngokulawula ngokuqinile ukuzinza kwamakhemikhali kwezingxenye zengqalasizinda yamanzi, izinga liqinisekisa ukuthi amathangi okugcina, imishayo, nezinto zokubopha ziletha amanzi ahlanzekile ngaphandle kokungenisa ukungcola okuthule, okwe-chemical. Kuba onjiniyela kanye nabangumnikazi bezakhiwo, ukucacisa ukuhambisana kwe-NSF/ANSI 61 kuyisisekelo sokunciphisa ubungozi nokwethembeka kwezimpahla zesikhathi eside ezinhlelweni zamanzi okuphuza.
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