Yuav Ua Li Cas Xaiv Ib Qhov Kev Pom Zoo Tshaj Tawm Xov Tooj?
Tso lus
1. Txheeb xyuas qhov muaj cov pa phem ib puag ncig
CLASSⅠ(Flammable Gases, Vapors lossis Liquids)
Kev faib cheeb tsam
Division 1:
Qhov twg cov hluav taws kub hnyiab ntawm cov pa taws, vapors lossis cov kua dej tuaj yeem muaj nyob txhua lub sijhawm lossis qee lub sijhawm nyob rau hauv ib txwm ua haujlwm.
Division 2:
Qhov twg ignitable concentrations ntawm flammable gases, vapors los yog kua yuav tsis muaj nyob rau hauv ib txwm ua hauj lwm tej yam kev mob.
Zone 0:
qhov twg ignitable concentrations ntawm flammable gases, vapors los yog kua tam sim no tsis tu ncua los yog ntev lub sij hawm nyob rau hauv ib txwm ua hauj lwm tej yam kev mob.
Zone 1:
Qhov twg ignitable concentrations ntawm flammable gases, vapors los yog kua yuav muaj nyob rau hauv ib txwm ua hauj lwm tej yam kev mob.
Zone 2:
qhov twg ignitable concentrations ntawm flammable gases, vapors los yog kua yuav tsis muaj nyob rau hauv ib txwm ua hauj lwm tej yam kev mob.
2. Paub qhov txawv ntawm cov pa phem ib puag ncig
Pawg
Division 1 thiab 2 Zone 0, 1 thiab 2
A (acetylene) IIC (acetylene thiab hydrogen)
B (hydrogen) IIC (acetylene thiab hydrogen)
C (ethylene) IIB (ethylene)
D (propane) IIA (propane)
3. Txov tooj max. qhov kub thiab txias (tsawg tshaj li qhov kub ntawm cov pa taws kub)
Cov chav kawm kub
Division 1 thiab 2: Zone 0, 1 thiab 2:
T1 (tsawg dua lossis sib npaug rau 450 degree) T1 (tsawg dua lossis sib npaug rau 450 degree)
T2 (tsawg dua lossis sib npaug rau 300 degree) T2 (tsawg dua lossis sib npaug li 300 degree)
T2A (tsawg dua lossis sib npaug li 280 degree) -
T2B (tsawg dua lossis sib npaug li 260 degree) -
T2C (tsawg dua lossis sib npaug li 230 degree) -
T2D (tsawg dua lossis sib npaug li 215 degree) -
T3 (tsawg dua lossis sib npaug li 200 degree) T3 (tsawg dua lossis sib npaug li 200 degree)
T3A (tsawg dua lossis sib npaug li 180 degree) -
T3B (tsawg dua lossis sib npaug rau 165 degree) -
T3C (tsawg dua lossis sib npaug li 160 degree) -
T4 (tsawg dua lossis sib npaug rau 135 degree) T4 (tsawg dua lossis sib npaug rau 135 degree)
T4A (tsawg dua lossis sib npaug li 120 degree) -
T5 (tsawg dua lossis sib npaug li 100 degree) T5 (tsawg dua lossis sib npaug li 100 degree)
T6 (tsawg dua lossis sib npaug li 85 degree) T6 (tsawg dua lossis sib npaug li 85 degree)
4. Cov txheej txheem tiv thaiv cov cuab yeej thiab cov cim sib raug
| 4.1 Cov txheej txheem tiv thaiv thoob ntiaj teb (cov cuab yeej tiv thaiv qib) | 4.2 Kev Tiv Thaiv North American |
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Zone0: • Intrinsic kev nyab xeeb,"ia"(Ga) • Encapsulation,"ma"(Ga) los yog "m" rau CAN • Class I,Div 1 intrinsic security |
Div.1: • Kev nyab xeeb sab hauv • Explosionproof • Purged/pressurized (Hom X lossis Y) • Txhua yam kev kawm I, Zone 0 |
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Zone 1: • Flameproof,"d"(Gb) • Pressurization,"px" los yog "py"(Gb) los yog "p" fo4 CAN • Powder filling "q" (Gb) • Roj immersion "o" (Gb) • Muaj kev nyab xeeb, "e"(Gb) • Intrinsic safety,"ib"(Gb) • Encapsulation, "mb" (Gb) los yog "m" rau CAN • Txhua qhov Zone 0 txheej txheem • Txhua chav kawm I, Div 1 txheej txheem |
Div.2: • Hermetically- kaw • Tsis yog -kev txhawb siab • Tsis yog-teeb • Purged / pressurized (Hom Z) • Muab kaw • Txhua yam kev kawm I, Division 1 • Ib hoob I, Zone 0,1 lossis 2 txheej txheem |
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Zone 2: • Pressurization,"pz"(Gc) los yog "n" rau CAN • Intrinsic Safety,"ic"(Gc) los yog "n" rau CAN • Encapsulated,"nC"(Gc) • Npog-break,"nC"(Gc) • Zog-limited,"nL"(Gc) • Hermetically-sealed,"nC"(Gc) • Tsis yog-incendive,"nC"(Gc) • Tsis yog-sparking,"nA"(Gc) • Txwv tsis pub ua pa,"nR"(Gc) • Sealed "nC" (Gc) • Encapsulation,"mc"(Gc) los yog "n" rau CAN • Ib Cheeb Tsam 0 lossis 1 txheej txheem • Txhua chav kawm 1, Div 1 lossis 2 txheej txheem |
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5. Txheeb xyuas qhov muaj hmoov av
CLASⅡ(Combustible Dusts)
Kev faib cheeb tsam
Division 1:
Qhov twg ignitable concentrations ntawm combustible plua plav tuaj yeem tshwm sim txhua lub sijhawm lossis qee lub sijhawm hauv kev ua haujlwm ib txwm muaj.
Division 2:
Qhov twg ignitable concentrations ntawm combustible plua plav yuav tsis muaj nyob rau hauv ib txwm ua hauj lwm tej yam kev mob.
Zone 20:
Qhov twg ignitable concentrations ntawm combustible plua plav los yog ignitable fibers/flyings yog tam sim no tsis tu ncua los yog ntev lub sij hawm nyob rau hauv ib txwm ua hauj lwm tej yam kev mob.
Zone 21:
Qhov twg ignitable concentrations ntawm combustible plua plav los yog ignitable fibers/flyings yuav muaj nyob rau hauv ib txwm ua hauj lwm tej yam kev mob.
Zone 22:
Qhov twg ignitable concentrations ntawm combustible plua plav los yog ignitable fibers/flyings yuav tsis muaj nyob rau hauv ib txwm ua hauj lwm tej yam kev mob.
6. Paub qhov txawv ntawm hom hmoov av
Pawg
Ntu 1 thiab 2: Thaj Chaw 20, 21 thiab 22:
E (hlau plua plav - Div. 1 nkaus xwb) IIIC (conductive plua plav)
F (carbonaceous plua plav) IIIB (tsis yog{0}}cov hmoov av conductive)
G (non-conductive dust) IIIB (non-conductive dust))
- IIA (combustible flyings)
7. Xov tooj Max.SurfaceThuab tais
Cov chav kawm kub
Ntu 1 thiab 2: Thaj Chaw 20, 21 thiab 22:
T1 (tsawg dua lossis sib npaug li 450 degree) Tsis muaj.
T2 (tsawg dua los yog sib npaug rau 300 degree) -----------------------------
T2A (tsawg dua lossis sib npaug li 280 degree) Lus Cim: Rau Cheeb Tsam 20, 21
T2B (tsawg dua lossis sib npaug ntawm 260 degree) thiab 22, khoom siv
T2C (tsawg dua lossis sib npaug li 230 degree) yuav tsum raug cim rau
T2D (tsawg dua lossis sib npaug li 215 degree) qhia txog kev ua haujlwm
T3 (tsawg dua los yog sib npaug rau 200 degree) kub
T3A (tsawg dua lossis sib npaug li 180 degree) (qhov siab tshaj plaws
T3B (tsawg dua lossis sib npaug rau 165 degree) kub)
T3C (tsawg dua lossis sib npaug li 160 degree)
T4 (tsawg dua lossis sib npaug rau 135 degree)
T4A (tsawg dua lossis sib npaug li 120 degree)
T5 (tsawg dua lossis sib npaug li 100 degree)
T6 (tsawg dua lossis sib npaug li 85 degree)
8. Cov txheej txheem tiv thaiv cov cuab yeej thiab cov cim sib raug
| 8.1 International Protection Techniques (Tebchaws Tiv Thaiv Cov Khoom Siv) | 8.2 Kev Tiv Thaiv North American |
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Zone 20: • Enclosure, "ta" (Da) • Intrinsic Safety, "ia" (Da) • Encapsulation, "ma" (Da) • Txhua yam II, Div 1 txheej txheem |
Div.1 • Kev nyab xeeb sab hauv • Plua plav-ignitionproof • Siab • Ib cheeb tsam 20 txheej txheem |
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Zone 21: • Enclosure, "tb" (Db) or "t" for USA • Pressurization, "p" (Db) • Intrinsic Safety, "ib" (Db) • Encapsulation, "mb" (Db) • Ib cheeb tsam 20 txheej txheem • Txhua yam II, Div 1 txheej txheem |
Div.2 • Plua plav- nruj • Hermetically- kaw • Tsis yog -kev txhawb siab • Siab • Muab kaw • Txhua yam kev kawm II, Division 1 • Ib cheeb tsam 20, 21 lossis 22 txheej txheem |
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Zone 22: • Enclosure, "tc" (Dc) • Pressurization, "p" (Dc) • Intrinsic Safety, "ic" (Dc) • Encapsulation, "mc" (Dc) • Ib cheeb tsam 20 lossis 21 txheej txheem • Txhua yam II, Div 1 lossis 2 txheej txheem |
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Explosion -cov pov thawj cheeb tsam kev faib tawm siv
FOR EXAMPLE (Kev tawg pov thawj xov tooj pov thawj tus qauv)
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II 2G Ex ebib [ibGb] mb IIC T6Gb II 2D Exib [ibDb]tbIIIC T80degreeC DbIP66 |
II: rau kev lag luam nto 2: Tso cai rau thaj tsam 1 thiab Zone 21 g :gaz D: plua plav Piv txwv li: hais txog kev tiv thaiv tawg eb: Muaj kev nyab xeeb ntxiv tb: Enclosure tiv thaiv ib Gb: Intrinsic Safety ib Db: Intrinsic Safety mb :ua ib: Intrinsic Safety IIC: acetylene & hydrogen IIIC: conductive plua plav T6: Cov khoom siv saum npoo kub tsawg dua lossis sib npaug li 85 degree IP66: ingress tiv thaiv tus qauv |
