NSF/ANSI Standard 61: Cov Dej Haus Dej Dej Cov Cheebtsam - Kev Noj Qab Haus Huv
Txheej txheem cej luam
NSF/ANSI Standard 61yog qhov kev lees paub dav dav txog kev noj qab haus huv- cov qauv cuam tshuam hauv Tebchaws Meskas thiab Canada. Nws tsim cov kev cai yam tsawg kawg nkaus rau kev tswj cov kev pheej hmoo ntawm tib neeg kev noj qab haus huv los ntawm cov kab mob sib kis uas yuavleachlos ntawm cov khoom, cov khoom, thiab cov khoom siv rau hauv cov dej haus.
Lub hauv paus ntsiab lus tseem ceeb yog tias txhua yam khoom uas nkag mus rau hauv cov dej haus, los ntawm cov chaw kho mob mus rau tus kais dej, yuav tsum tsis txhob ua rau muaj kev phom sij ntawm cov kab mob.
Cov Lus Qhia Tseem Ceeb
Scope:Tus qauv npog ntau yam ntawm cov khoom:
Piping Systems:Cov kav dej, fittings, li qub, faucets.
Cov ntaub ntawv tiv thaiv:Linings, coatings, sealants, lubricants.
Tshuaj Kho Dej:Coagulants, fluoride, pH adjusters.
Txheej txheem Media:Lim media, ion txauv resins, membranes.
Xaus-Point Devices:Cov chaw lim dej hauv tsev, cov dej khov nab kuab, cov tshuab tso dej.
Cov txheej txheem kuaj:
Cov khoom kuaj tau muab tso rau hauv cov dej ntsuas tshwj xeeb.
Kev sim simulates qhov phem tshaj -cov ntaub ntawv tiag tiag- lub ntiaj teb tej yam kev mob (xws li, lub sij hawm stagnation, kub).
Cov dej tau txheeb xyuas los ntsuas qhov concentration ntawm cov kab mob uas tau leached los ntawm cov khoom.
Contaminant Limits:
Tus txheej txheem teev nrujPass/Fail Criterialos yog Qib Siab Tshaj Lij Tshaj Lij Tshaj Lij Tshaj Lij rau txhua yam kab mob.
Cov kev txwv no yog ua raws li cov ntaub ntawv toxicological, xav tias kev haus dej txhua hnub, thiab cov khoom lag luam muaj feem cuam tshuam rau tag nrho cov dej txhua hnub.
Rooj
Table 1: Hom Kab Mob Kabmob & Cov Khoom Muaj Peev Xwm
| Hom kab mob | Cov piv txwv tshwj xeeb | Cov peev txheej hauv cov khoom |
|---|---|---|
| Hlau / Inorganics | Lead (Pb), Cadmium (Cd), Chromium (Cr), Arsenic (As), Antimony (Sb) | Brass / bronze alloys, solders, stabilizers, coatings. |
| Volatile Organic Compounds (VOCs) | Benzene, Toluene, Vinyl Chloride | Plastics, roj hmab, cov kuab tshuaj, cov nplaum, coatings. |
| Additives & Stabilizers | Phthalates, Phenols, Organotins | Plasticizers thiab kub stabilizers hauv PVC / CPVC yas. |
| Lwm yam Organics | Total Organic Carbon (TOC), Bisphenol A (BPA) | Yas resins, epoxy linings, adhesives. |
Table 2: Piv txwv Cov Khoom Muag Khoom thiab Kev Ntsuas Ntsuas
| Yam khoom | Kev Ntsuam Xyuas Thawj Tswj Xyuas |
|---|---|
| Xaus -Point Devices(piv txwv li, faucets, hauv qab -sink filters) | Hlau leaching, organic tebchaw. |
| Cov kav dej, Fittings, Valves | Cov hlau leaching los ntawm alloys, organics los ntawm plastics / coatings. |
| Kev Tiv Thaiv Txheej Txheem & Sealants | Volatile/Semi-volatile organics, hlau, additives. |
| Tshuaj Kho Dej | Concentration ntawm impurities (xws li, Arsenic, Lead) nyob rau hauv cov khoom nws tus kheej. |
| Txheej txheem Media(piv txwv li, activated carbon, lim media) | Hlau leaching, TOC increment. |
Table 3: Cov kauj ruam tseem ceeb hauv cov txheej txheem ntawv pov thawj
| Kauj ruam | Kev piav qhia |
|---|---|
| 1. Daim ntawv thov | Chaw tsim tshuaj paus xa ib daim ntawv thov mus rau lub cev muaj ntawv pov thawj (xws li, NSF International). |
| 2. Formulation Review | Tus neeg tsim khoom yuav tsum tshaj tawm txhua cov ntsiab lus ntawm kev tsim qauv (ib qho yuav tsum muaj qhov tseem ceeb). |
| 3. Kev sim | Cov khoom raug kuaj nyob rau hauv ib qho chaw kuaj pom zoo raws li tus qauv kev cai. |
| 4. Daim ntawv pov thawj thawj zaug | Yog tias cov khoom dhau tag nrho cov kev xeem, nws tau teev tseg thiab cov chaw tsim khoom tau txais daim ntawv pov thawj. |
| 5. Kev Ua Raws Li Kev Cai Tsis Txaus | Unannounced txhua xyoo kev tshuaj xyuas cov nroj tsuagthiab ncua sij hawm rov- kuaj xyuas kom ua raws li txuas ntxiv. |
Vim li cas NSF/ANSI 61 tseem ceeb?
Public Health:Nws yog tus qauv ntsuas tseem ceeb rau kev tiv thaiv cov dej haus los ntawm kev sib kis los ntawm cov ntaub ntawv nws tiv tauj.
Txoj Cai Ua Raws Cai:Feem ntau cov xeev hauv Asmeskas thiab Canadian cov xeev xav kom ua raws li NSF / ANSI 61 rau cov khoom siv hauv cov dej hauv pej xeem.
Risk Mitigation:Nws pab cov tuam ntxhab, cov khoom siv hluav taws xob, thiab cov kav dej xaiv cov khoom lag luam uas tau lees paub tias muaj kev nyab xeeb rau cov dej haus.
Kev Ua Lag Luam:Cov ntawv pov thawj feem ntau yog qhov yuav tsum tau ua ua ntej rau kev muag khoom rau hauv nroog thiab cov chaw xa dej loj.
Hauv cov ntsiab lus,NSF/ANSI Standard 61 yog kev noj qab haus huv tseem ceeb- raws li tus qauvuas muab kev lees paub tias cov khoom thiab cov khoom siv hauv peb cov dej haus muaj kev nyab xeeb thiab yuav tsis ua rau muaj kev phom sij ntawm cov kab mob hauv peb cov dej.
