Kev taw qhia luv luv Hauv Cheeb Tsam Muaj Xwm Ceev
Aug 11, 2023
HAZARDOUS AREA ZONES, DEFINITIONS & EXPLOSION PROTECTION
Tsab ntawv xov xwm no muab cov ntsiab lus nthuav dav ntawm kev tsim thiab kev siv cov cuab yeej tsim los siv rau hauv thaj chaw uas muaj peev xwm muaj cov huab cua tawg tshwm sim los ntawm cov pa roj, vapors, thiab cov plua plav lossis fiber ntau. Cov cheeb tsam no feem ntau hu ua thaj chaw muaj kev phom sij.
Ib qho "chaw txaus ntshai" yog qhov chaw nyob qhov chaw uas muaj huab cua, lossis muaj peev xwm muaj cov pa taws kub hnyiab los yog tawg, plua plav, lossis vapors hauv ntau qhov tseem ceeb.
HAZARDOUS AREAS
Txhawm rau tiv thaiv kev teeb tsa tiv thaiv kev tawg, nws yog ib qho tsim nyog yuav tsum siv cov txheej txheem rau kev tshuaj xyuas thiab cais cov cheeb tsam uas yuav muaj kev phom sij. Lub hom phiaj tseem ceeb ntawm cov txheej txheem no yog los lav qhov kev xaiv tsim nyog thiab kev teeb tsa ntawm cov cuab yeej tsim nyog, thaum kawg txhawm rau tiv thaiv kev tawg thiab ua kom muaj kev nyab xeeb ntawm tib neeg.
Explosive Zone thiab Hazardous Area Description
Cov khoom siv hluav taws xob tawg tau raug cais thiab siv tau rau thaj chaw tawg raws li lawv cov kev tsim kho, raws li qhia hauv cov lus hauv qab no
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Lub npe & Code |
Txhais thiab yam ntxwv |
Daim duab |
Qhov chaw tsim nyog |
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siab- tiv taus tawg-pov thawj （d） |
(1) Lub kaw lus tau nruab nrog cov khoom siv hluav taws xob xws li NFB, MS, thiab lwm yam, uas tuaj yeem tsim cov nplaim taws thaum lub sijhawm ua haujlwm. (2) Yog tias cov pa phom sij khiav tawm thiab ua rau muaj kev tawg, lub thawv yuav tsum muaj peev xwm tiv taus qhov tawg siab thiab tiv thaiv cov nplaim hluav taws xob los ntawm kev sib tshuam, igniting explosions ntawm sab nraud cov pa phem. |
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ZONE 1
ZONE 2 |
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kev ruaj ntseg-ua kom zoo tawg-pov thawj （e） |
(1) Lub kaw lus yog tsim los rau airtightness thiab tsis muaj peev xwm ua haujlwm siab. (2) Sab hauv tsuas tuaj yeem ua raws li cov khoom siv uas tsis tsim sparks los yog kub heev Thaum lub sijhawm ua haujlwm ib txwm, xws li Eexe terminals thiab Eexd-modules (siab-resistant tawg- pov thawj modules). Lub siab-resistant tawg-pov thawj hluav taws xob Cheebtsam uas tsim los ntawm Eex-d molding yog cov khoom tshiab uas tsis pub dawb los ntawm cov pa taws thiab kub dhau, ua rau lawv tsim nyog siv rau hauv ntau lub thawv tswj. |
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ZONE 1
ZONE 2 Yog tias muaj cov khoom siv hluav taws xob uas yuav ua rau muaj hluav taws xob lossis kub dhau, lawv tsuas yog siv tau hauv ZONE 2. |
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sab hauv siab tawg- pov thawj （p） |
Lub thawv ntim khoom yog ib lub thawv ntim khoom siv tab sis ua rau hauv qhov ntim tag nrho. Internal pressurization generates ib tug me ntsis siab dua atmospheric siab los tiv thaiv cov ingress ntawm cov pa phem los ntawm sab nraud. Lub convection ntawm qhov nyiaj npib pipeline pab kom dissipate sab hauv tshav kub. Nws yog feem ntau siv hauv cov cuab yeej loj lossis tag nrho chav tswj |
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ZONE 1
ZONE 2 |
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inherently nyab xeeb tawg-pov thawj （i） |
(1) Tsim los rau cov hluav taws xob hluav taws xob lossis hluav taws xob hluav taws xob tsawg los tiv thaiv qhov tshwm sim ntawm cov pa tawg nyob ib puag ncig cov cuab yeej thiab cov khoom siv hluav taws xob, tsis hais txog kev ua haujlwm li qub lossis txawv txav. (2) Cov khoom siv hluav taws xob los yog cov khoom siv hluav taws xob ntawm cov khoom siv hluav taws xob tawg yog tsim los tswj qis dua qib zog uas muaj peev xwm ua rau hluav taws xob hydrogen thiab tawg. |
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ZONE 0(ia) ZONE 1 (ia,ib) ZONE 2 (ia,ib) |
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roj-immersed tawg- pov thawj （o） |
(1) Cov khoom siv hluav taws xob hauv lub thawv yog cov hloov pauv, thiab cov roj hluav taws xob siab hluav taws xob yog siv rau kev sib cais kom ua tiav cov txiaj ntsig tawg. (2) Cov cuab yeej siv no muaj kev ntseeg tsis zoo thiab tsis tshua siv rau niaj hnub no. |
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ZONE 1
ZONE 2 |
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puv tawg-pov thawj （q） |
(1) Cov hluav taws xob hluav taws xob xws li cov khoom siv hluav taws xob, cov khoom siv hluav taws xob, thiab cov hloov hluav taws xob me me tau nruab rau hauv lub thawv thiab cais nrog cov xuab zeb zoo kom ua tiav cov txiaj ntsig tawg. (2) Hom qauv no tsis yog siv cais, tab sis theej ntsia hauv EEexe enclosure rau kev siv. |
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ZONE 1 ZONE 2 |
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txhaj tshuaj molded siab - tiv taus tawg-pov thawj （m） |
(1) Qhov no yog ib txoj kev tiv thaiv tawg qhov chaw uas tej zaum yuav ua rau muaj txim los yog kub heev yog encapsulated nrog ib tug tag nrho polyester molding, xyuas kom meej tias lub nto ntawm tag nrho cov molded enclosure yuav tsis tsim sparks los yog kub nce uas yuav ua rau ignition ntawm cov pa phem. . (2) Tswj cov khoom ntawm cov keyboards dav dav hauv qab 630A yog ua tiav los ntawm molding siv cov khoom siv polyester raws li qhov yuav tsum tau muaj kev kub siab tiv thaiv tawg-pov thawj specifications thiab pom zoo los ntawm EEx-d. |
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ZONE 1
ZONE 2 |
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tshwj xeeb tawg-pov thawj (s) |
Cov qauv tshwj xeeb tawg-pov thawj yog hais txog kev sib txuas hluav taws xob tshwj xeeb lossis kev tswj hwm, uas tau ua tiav raws li cov qauv hais saum toj no. Lawv yuav tsum tau tsim ib tus kheej rau cov khoom siv hluav taws xob tshwj xeeb uas tsim nyog rau kev siv nyob rau hauv qhov yuav tsum tau muaj kev phom sij thiab pom zoo los ntawm cov pov thawj tawg-pov thawj txoj cai. |
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ZONE 0
ZONE 1 ZONE 2 |
Cov lus sib piv ntawm cov khoom siv hluav taws xob tawg, cov ntsiab lus, thiab cov chaw muaj kev phom sij
Kev kub siab-resistant tawg-pov thawj tsim thiab kev faib tawm
Ib qho yuam kev uas ntau tus neeg ua yog siv cov lus "siab-resistant explosion-proof zone" lossis "safety-increased explosion-proof zone", uas yog tsis raug. Cov ntsiab lus raug yuav tsum tau siv los piav qhia txog kev faib tawm ntawm thaj chaw tawg-pov thawj raws li '0 qib', '1 theem', lossis '2 theem' thaj chaw. Cov ntsiab lus "siab-resistant" thiab "kev nyab xeeb-nce" yuav tsum tau siv los piav txog kev tsim cov khoom siv hluav taws xob tawg, tsis yog xa mus rau thaj chaw tshwj xeeb. Nws yog ib qho tseem ceeb rau txhua tus kom paub qhov txawv ntawm cov tswv yim no.
Txhua qhov kev tsim ua pov thawj tawg tau hais los saum no muaj cov cai tsim khoom tshwj xeeb. Nyob rau hauv cov ntaub ntawv ntawm lub siab-resistant explosion-proof cov cuab yeej, tshwj xeeb yuav tsum tau ua raws li vim muaj cov hluav taws xob Cheebtsam uas tej zaum yuav tsim sparks los yog kub heev thaum lub sij hawm ib txwm ua hauj lwm. Feem ntau, lub plhaub ntawm cov khoom siv no yuav tsum muaj lub thickness ntau dua (lub zog) thiab yuav tsum tiv taus qhov siab ntawm tsawg kawg yog 10 Kg / Cm² los ntawm cov khoom tawg tawg xws li H2 yam tsis muaj kev puas tsuaj tom qab kev sim rov ua dua (feem ntau hu ua explosion tests). Tsis tas li ntawd, qhov kam rau ua thiab qhov tob ntawm cov pob qij txha ntawm cov khoom siv plhaub yog nruj me ntsis tswj. Feem ntau, cov txheej txheem kev sim yuav suav nrog kev sau cov chaw sab nraud ntawm lub plhaub nrog cov roj sib xyaw ua ke, thiab yog tias cov nplaim hluav taws xob sab hauv ntawm lub plhaub tsis ua rau cov roj hluav taws xob sab nraud rau kaum qhov kev xeem sib law liag, nws tuaj yeem suav tias dhau qhov kev xeem. Xwb, ua raws li cov cai tswj kev nyab xeeb kuj tuaj yeem lees paub los ntawm kev ua raws li cov qauv ntsuas thoob ntiaj teb. Cov lus hauv qab no muab piv txwv raws li JIS (Japanese Industrial Standards) cov txheej txheem, nrog me ntsis kev hloov pauv rau cov txiaj ntsig siv hauv Tebchaws Europe thiab Tebchaws Meskas (uas feem ntau zoo sib xws).
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Qib tawg |
Kev tshem tawm m / m |
ntim ntawm lub thawv |
qhov tob ntawm qhov clearance |
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1 |
Saum toj no 0.6 |
(A) 2000CM³ |
Ntau tshaj lossis sib npaug li 25m / m |
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2 |
0.4 saum toj no 0.6 hauv qab no |
(B) 2000-100CM³ |
Ntau tshaj lossis sib npaug li 15m / m |
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(C) 100-2CM³ |
Ntau tshaj lossis sib npaug li 10m / m |
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3 |
0.4 hauv qab no |
(D) 2CM³ Hauv qab no |
Ntau dua lossis sib npaug li 5m / m |
Tus sawv cev ntawm cov theem tawg nyob rau hauv European, American, thiab Japanese systems
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Table 5 (Cov txheej txheem thoob ntiaj teb cov lej thiab kev sib piv piv rau qib tawg)
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Raws li cov lus saum toj no, nws tau sau tseg tias qhov kev sawv cev zoo ib yam ntawm Nyiv thiab Europe, thaum lub tebchaws United States ua raws li kev sib txawv. Txawm li cas los xij, nws sawv cev rau ob qhov xwm txheej sib txawv. Ua ntej, yog tias theem tawg yog sawv cev los ntawm Japanese style ntawm 1, 2, 3, los yog European style ntawm IIA, IIB, IIC, los yog American style ntawm A, B, C, D, ces lub siab-resistant explosion- pov thawj plhaub yuav tsum tau tsim raws li cov ntaub ntawv nyob rau hauv lub rooj. Qhov thib ob, ntxiv rau qhov sawv cev rau cov xwm txheej, nws kuj tseem sawv cev rau cov pa phem (kua) ib puag ncig muaj feem xyuam rau ib pab pawg tshwj xeeb. Qhov tseeb, European A, B, C thiab Asmeskas A, B, C, D sawv cev rau qhov rhiab heev ntawm cov pa phem (kua) kom tawg tawg thiab qhov yuav tsum tau ua ntawm kev tsim hluav taws xob tawg-pov thawj. Cov pa phem ntau (kua) raug cais los ntawm Tebchaws Europe thiab Tebchaws Meskas (raws li qhia hauv Table 6). Qhov kev faib tawm no yog ua raws li qhov muaj kev phom sij ntawm sparks (piv txwv li, flashpoint) thiab qhov hluav taws xob ntawm ntau yam khoom siv phom sij (kua), qhia qhov kub thiab txias uas lawv yuav ignite txawm tias tsis muaj sparks. Yog li ntawd, nws yog ib qho tsim nyog los qhia qhov ntsuas kub ntawm cov pa phem (kua) txheeb ze rau qhov kub thiab txias ntawm cov khoom siv hluav taws xob tawg (raws li qhia hauv Table 7) txhawm rau ua tiav kev tiv thaiv kev nyab xeeb.
Kev kub siab-resistant tawg-pov thawj tsim thiab kev faib tawm
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Lgnition Kub rau /l/in degree |
EN LUB IEC |
JIS |
NEC |
Lgnition Kub ure ua /2 / hauv degree |
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Pab pawg |
Flash Point degree |
Hom gases los yog Vapors |
IGNI- TION CLASS |
Pab pawg |
Typicsl Gases los yog vapors |
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540 515 425 460
630 630 555 365 340
505 370 530 215 240 220 595 455 475 210 285 360
220-300 470 405 455 550 490 535 385 415
140 605
425 535 495 180
440 415 |
II A |
-19 GAS 11.1
GAS -11.1
28.9
-4 -21.7
GAS 11
12
32.7 -42.8
GAS 11.7 -32.7
32
17.2
-37.8 GAS |
Aceton Athan Athanol Athylacetat Athylnitrit Ammoniak Anilin Benzol Butan Butanol
Butanon Butylaacetat Dichlorathy Heptan Hexan Heizol Methan Methanol Methylacetat Octan Pentan Pentanol Petroleum-Nafta Petrolum (einschl.Fahtbenzin) hmoov Propan Propanol Propylen Pyridin Styrol Toluol Viny lacetat Viny lCHLORID Xylole
Acetaldehyd Kohlenmonoxid |
1 |
D |
aceton athane ua ethanol (ethyl cawv) ethyl acetate hmoov ammonia tshuaj benzene butane 1-butanol 2-butanol methyl ethyl ketone n-butyl acetate hmoov ethylene dichloride heptanes hexas methane (natural gas) methanol (methyl cawv)
octanes pentanes 1-pentanol roj av naphtha roj av tshuaj propane 1-propanol 2-propanol propylene pyridine styerne toluene yas acetate Vinyl chloride Xylenes |
465 515 356 427
651
560 405 365/405
516 425 413 280 225
539 385 220 260 300 288 280-456
450 440/399 460 482 490 480 427 472 530 |
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C |
Acetaldehyde Cov pa roj carbon monoxide
Ethylene hydrogen cyanide cyclopropane Diethyl ether |
175 610
490
500 160 |
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II B |
GAS GAS
GAS |
Athylen Cyanwasserstoff Cylclopropan Diathylather Tetrafluorathylen
Acrylaldehyd (Acroleiin) Athylenoxid Butadien -1,3 |
2 |
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B |
Acrolein Ethylene oxide Butadiene |
220
429 420 |
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Lgnition Kub rau /l/in degree |
EN LUB IEC |
JIS |
NEC |
Lgnition Kub ure ua /2 / hauv degree |
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Pab pawg |
Flash Point degree |
Hom gases los yog Vapors |
IGNI- TION CLASS |
Pab pawg |
Typicsl Gases los yog vapors |
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560
430
560
305
95 |
IIB |
GAS
-37.2 |
Koksofengas Propy lenoxid |
2 |
B |
tsim cov pa roj (muaj ntau dua 30% hydrogen (los ntawm ntim) propylene oxide hmoov Hydrogen |
449
400 |
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II C |
GAS
GAS
-30 |
Wasserstoff
Acetylen Athylnitrat
Schwefelkoh -Lenstoff |
3a
3 3c
3b |
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A |
Acetylene |
305 |
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Tshwj xeeb Kev tiv thaiv |
Cov pa roj carbon disulfide |
100 |
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Lus ceeb toom |
Nyob rau hauv cov lus saum toj no, nyob rau hauv Japanese JIS tawg theem 3, vim nws qib siab dua, muaj tsawg dua cov pa phem (kua kua) cais raws li qib no. Tshwj xeeb, gases (kua) raug xaiv ua 3a| 3b thiab 3c ncaj qha sawv cev rau qib no, thaum tus so uas tsis tau teev tseg yog sawv cev raws li 3N. |
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Kev piav qhia sib piv ntawm cov ntsiab lus ignition thiab cov cim hauv ntau lub teb chaws 'explosion-proof systems
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Qib |
Temp Range |
CodeJap |
Code EU |
Code USA |
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1 |
450 degree saum toj no |
G1 |
T1 los yog G1 |
T1 450 degree |
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2 |
300-450 degree |
G2 |
T2 lub G2 |
T2 |
300 degree |
T2C |
230 degree |
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T2A |
280 degree |
T2D |
215 degree |
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T2B |
260 degree |
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3 |
200-300 degree |
G3 |
T3 los yog G3 |
T3 |
200 degree |
T3B |
165 degree |
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T3A |
180 degree |
T3C |
160 degree |
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4 |
135-200 degree |
G4 |
T4 lub G4 |
T4 |
135 degree |
T4A |
120 degree |
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5 |
100-135 degree |
G5 |
t5 lub g5 |
T5 100 degree |
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6 |
85-100 degree |
G6 |
t6 lub g6 |
T6 85 degree |
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Muaj ib lub tswv yim tseem ceeb hais txog qhov ntsuas kub hauv chav ntsuas kub, uas feem ntau tsis to taub los ntawm cov pej xeem. Hauv Table 7, yog tias nws hais txog cov kev cai rau cov khoom siv hluav taws xob tawg, nws txhais tau hais tias qhov kub thiab txias ntawm cov khoom siv hluav taws xob yuav tsum tsis pub tshaj tus nqi. Nws tsis yog hais txog qhov kub thiab txias ntawm cov khoom siv hluav taws xob. Feem ntau, thaum xaiv cov khoom siv hluav taws xob, qhov kub thiab txias ntawm qhov chaw yuav qis dua qhov hluav taws kub ntawm cov pa phem (kua) hauv qhov chaw tshwj xeeb, txhawm rau txhim kho kev nyab xeeb.
Xav txog cov ntaub ntawv saum toj no, nws zoo nkaus li tias qhov muaj cov nplaim taws lossis qhov kub thiab txias tshaj qhov hluav taws kub ntawm cov pa phem (kua kua) tsis yog qhov kev txhawj xeeb xwb. Nyob rau hauv qhov tseeb, muaj peb yam uas yuav ua rau combustion: 1. Muaj cov nplaim taws los yog combustible vapors. 2. Ignition qhov chaw (xws li sparks los yog saum npoo kub ncav cuag lub ignition point ntawm cov roj txaus ntshai). 3. Muaj cov tshuaj oxidizing (xws li cua lossis cov pa ntshiab). Yog li ntawd, txawm tias muaj peev xwm ignition qhov chaw nyob rau hauv cov cheeb tsam uas muaj kev phom sij, explosions yuav tsis tshwm sim yog hais tias cov concentration ntawm cov khoom txaus ntshai heev heev los yog tsis txaus oxidizing huab cua. Ib yam li ntawd, yog tias qhov concentration ntawm cov khoom tsim kev puas tsuaj tsawg dhau, nws feem ntau tsis ua rau muaj kev pheej hmoo loj. Txhua yam khoom siv phom sij muaj qhov sib txawv ntawm qhov sib txawv, thiab cov concentrations nyob rau hauv qhov kev teev tseg yog suav tias yog qhov txaus ntshai heev. Qhov no txhais tau hais tias peb lub ntsiab lus ntawm combustion tsuas tuaj yeem tshwm sim nyob rau hauv qhov chaw no, muab kev nkag siab zoo dua ntawm qee yam ntawm qhov chaw tawg-pov thawj.
Nyob rau hauv lub neej yav tom ntej, nws tseem ceeb heev kom nkag siab txog cov lus qhia txog kev tawg-pov thawj cov cim siv hauv Tebchaws Europe, Amelikas, thiab Nyij Pooj thiaj li yuav xaiv cov khoom tsim nyog. (xws li Table 8).
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System Code |
Thawj No. Kev tsim kho Code |
Thib ob No. Explosion Level Code |
Peb No. Flash point kub Level |
Lus ceeb toom |
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EU |
IEC (EEx) |
d ,e ,i ,q ,s |
IIA, IIB, IIC |
T1-T6 G1-G6 |
Piv txwv: EExde IIc T6 |
|
Teb chaws USA |
NEC (NEMA) |
1 DIV 1 CLASS 1 DIV 2 |
A ,B ,C ,D |
T1-T6 |
Piv txwv: CLASS 1 DIV 1 GROUP C@D |
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Nyiv SK CHN |
NEC (JIS) (CKS) (CNS) |
d ,e ,I ,q ,s |
1 ,2 ,3 3a 3b 3c 3n |
G1-G6 |
Piv txwv d3n6 d2g4 eG 3 |
