Ntawm cov npe khoom, hauv cov ntaub ntawv khoom, thiab hauv cov ntawv qhia kev teeb tsa, cov khoom pov thawj raug txheeb xyuas los ntawm cov cim. Cov qhab nia yog qhov sib txawv ntawm cov khoom tawg tsis zoo thiab cov nplaim hluav taws vim lawv ua raws li ntau yam kev faib tawm thiab Cov Qauv.
Explosion-resistant Markings
Raws li Chav Kawm/Division system, cov qhab nia tawg rau cov khoom uas ua tau raws li North American Standards muaj lawv Chav Kawm thiab Division. Ob chav T-chav kawm ntawm cov khoom siv hluav taws xob thiab cov roj hluav taws xob qhov hluav taws xob tau pom los ntawm cov cim.
Ntawm no yog ib qho piv txwv ntawm Chav Kawm / Kev faib cov cim rau cov khoom lag luam uas tau tso cai siv rau hauv North America los ntawm North American certification lub cev. Lub "XP" qhia txog kev tawg pov thawj raws li xaiv hom kev tiv thaiv:
Pawg A, B, C, thiab D ntawm Chav Kawm I, Division 1; T4 (XP)
Flameproof Labels
Nyob ntawm seb daim ntawv pov thawj tau txais li cas (ntawm IEC lossis hauv North America), cov khoom sib txawv uas ua tau raws li cov qauv rau Zone system ntawv pov thawj pom cov cim flameproof sib txawv.
Hauv qhov piv txwv no, cov cim rau cov khoom nrog Zone-raws li ntawv pov thawj tau txais los ntawm IEC raug tso tawm.
Ex db T4 IIC GB
Qhov chaw txaus ntshai yog qhia los ntawm Ex. "db" stands rau flameproof. Gas pawg (II A, B, lossis C) raug xa mus los ntawm cov ntawv luv IIC. T4 sawv cev rau cov chav kawm kub (nws yuav yog T1, 2, 3, 4, 5, lossis 6) thiab Gb sawv cev rau Zone 1 ntawm Cov Khoom Siv Tiv Thaiv (Zone 0 thiab Zone 2 yog sawv cev los ntawm Ga thiab Gc, raws).
b) Cov piv txwv hauv qab no qhia cov cim rau cov khoom uas nws daim ntawv pov thawj tau txais nyob rau hauv Teb Chaws Asmeskas rau kev siv hauv Teb Chaws Asmeskas:
Class I, Zone 1, AEx db IIC T4 Gb or Zone 1, AEx db IIC T4 Gb
c) Cov piv txwv hauv qab no qhia txog cov cim rau cov khoom uas nws daim ntawv pov thawj tau txais hauv Canada thiab npaj rau siv hauv Canada:
Ex db T4 IIC GB
