Lub Plaub Hlis 2016, UL tshaj tawm cov ntaub ntawv tshuaj xyuas kev lag luam (IFR) rau txhua cov pa hluav taws thiab cov pa hluav taws kub nyhiab kom hais txog ntau dua li 350 kev hloov pauv hloov cov kws tsim khoom yuav tsum ua rau lawv cov khoom lag luam los tuav lawv cov npe UL (ntawv pov thawj). IFR koom nrog kev kho dua tshiab rau cov qauv uas feem ntau tsim nyog kom nrog cov kev hloov tshiab hauv thev naus laus zis, muaj kev cuam tshuam cov kev hloov hauv kev lag luam lossis daws cov teeb meem kev nyab xeeb tshiab lossis tshwm sim. Txhawm rau kom tau txais peb daim ntawv pov thawj, cov tswb txhom pa hluav taws raug soj ntsuam rau UL 217 (8 th tshaj tawm), Cov qauv rau kev nyab xeeb ntawm cov pa luam yeeb, thiab cov pa hluav taws raug soj ntsuam rau UL 26 8 ({{5 }} th cov ntawv luam tawm), Cov Qauv rau Kev Nyab Xeeb Kev Ntsuas Hluav Taws rau Cov Tswb Hluav Taws.
Cov neeg tsim tsa lub tswb ntsuas pa thiab cov pa hluav taws muaj txog lub Tsib Hlis 29, 2020, kom ua tau raws li txoj cai tshiab. Cov kev cai tshiab thiab kho tshiab hauv UL 217 thiab UL 268 sawv cev qhov kev hloov pauv tseem ceeb ntawm Cov Qauv no txij li lawv tau luam tawm thawj zaug nyob hauv 1976. Cov kev ntsuas hluav taws tshiab thiab pa taws tau ntxiv rau ob qho kev ntsuas, suav nrog kev sim ua npuas hluav taws xob polyurethane ua npuas thiab kuaj cov pa taws ncho tawm.Tshawb nrhiav los ntawm UL, Lub Koom Haum Tebchaws ntawm Cov Qauv thiab Kev Kawm Txuj Ci (NIST) thiab National National Protection Protection NF (NFPA)) tau pom tias yuav tsum tau xeem qhov no vim los ntawm kev hloov txauv khoom siv hauv tsev thiab ua tiav cov khoom tiav ntawm 30 xyoo dhau los. Cov pa luam yeeb ua tawm los ntawm kev kub nyhiab lossis ua pa taws thiab yas tsim hluav taws kub pa hluav taws nrog cov pa hluav taws uas txawv ntawm cov pa luam yeeb xim, qhov ntau thiab lub ntsiab txhais los ntawm cov pa luam yeeb ua ntej sim thiab them los ntawm Cov Qauv.
Kev sim ua rau muaj kev tsis zoo noj tau ntxiv rau ob tus qauv: kev tshawb fawb qhia tias qhov thib ib yog vim li cas tib neeg thiaj li tsis ua pa taws yog vim lub suab nrov tsis zoo los ntawm kev ua noj.
Cov khoom lag luam uas tau tsim kho kom ua tau raws li qhov xav tau tshiab yuav tsum ua kom tau raws li ob qho tseem ceeb:
1 .Txhais ntau qhov kev txiav txim siab kom tau raws li ob qhov kev soj ntsuam ua npuas polyurethane tshiab
Lub peev xwm los paub qhov txawv ntawm cov pa taws ntawm cov pa hluav taws los ntawm cov pa hluav taws thiab cov pa pa pa taws los ntawm cov chaw ua noj
Cov ntsuas hluav taws xob uas muab ntau dua kev daws teeb meem lossis kev sib cais ua ke nrog ntau cov lej nyuaj ntxiv yuav raug siv los ntawm cov tuam ntxhab kom tau raws li cov kev xeem tshiab no.
Thawj cov qauv ntsuas pa luam yeeb ntau yam kom tau raws li cov cai ntawm UL 268, 7 th tshaj tawm tau lees paub los ntawm UL nyob rau lub Cuaj Hli 2018. Tam sim no, cov chaw tsim khoom lag luam nquag ua lawv cov kev soj ntsuam kev tshawb fawb thiab ua raws li cov ntawv pov thawj kom ua raws li cov cai tshiab ntawm UL cov pa tshiab nrhiav kom tau cov teeb meem kuaj pom nyob hauv Northbrook, Illinois. Cov ntaub ntawv pov thawj cov khoom lag luam suav nrog kev nkag hauvUL Khoom iQDatabaseCov. Kev nkag mus siv dawb, tab sis yuav tsum muaj ib zaug xwb.
Nws yog ib qho tseem ceeb kom nco ntsoov tias cov tswb txhom pa hluav taws ua haujlwm uas nyob hauv lawv lub neej 10-xyoo txuas ntxiv muab kev tiv thaiv nyob rau hauv qhov kev kub nyhiab. Thaum lub tswb ntsuas pa hluav taws yuav tsum tau hloov, nrhiav cov npe thiab cov paib ntawm cov pa hluav taws uas muaj ntawv pov thawj pom tias ua tau raws li cov qauv kev nyab xeeb.
Cov pa luam yeeb ua pa uas UL tau lees paub rau 8 th ntawm UL 217 thiab 7 luam tawm ntawm UL 268 yuav nqa ib daim UL txhim kho uas suav nrog cov lus sau "pab txo cov kev ceeb toom ua kom tsis txob noj. ”Saib cov duab no ntawm cov ntim khoom lag luam txhawm rau qhia cov khoom lag luam tau ua tiav cov kev cai tshiab thiab kho tshiab.
