Cikakken Bayanin Alamomin Tabbacin Fashewa

Ƙayyade

Ƙimar kariyar fashewa, ajin zafin jiki, nau'in kariyar fashewa, da alamar yanki masu dacewa sune mahimman abubuwan da za a iya kimanta kayan lantarki da ke hana fashewa. Ana amfani da wannan bayanin don bayyana matakin kariya daga fashe-fashe, kewayon zafin jiki wanda kayan aiki zasu iya aiki lafiya, nau'in kariyar fashewa da aka bayar, da wuraren da aka keɓe inda kayan aikin suka dace.

Ɗaukar Ex demo IIC T6 GB a matsayin misali

EX

Wannan alamar tana nuna cewa na'urorin lantarki sun haɗu da ɗaya ko fiye nau'in tabbatar da fashewa a cikin matakan tabbatar da fashewa;
Daidai da ƙayyadaddun ƙayyadaddun da aka bayyana a cikin labarin 29 na GB3836.1-2010, wajibi ne don na'urorin lantarki masu hana fashewa don ɗaukar bambanci “Ex” yin alama a cikin wani babban matsayi a jikin ta na waje. Bugu da kari, Dole ne lambar sunan kayan aikin ya nuna alamar tabbatar da fashewar da ake bukata tare da lambar takaddun shaida da ke tabbatar da ita
yarda.

Demb

Nau'in kariyar fashewar da aka nuna na kayan lantarki mai tabbatar da fashewa yana ƙayyade takamaiman m yankin haɗari an tsara shi don.

Nau'in Hujjar fashewa

Nau'in tabbatar da fashewa	Alamar alamar fashewar nau'in fashewa	Bayanan kula
Nau'in hana wuta	d
Ƙara nau'in aminci	e
Matsi	p
Nau'in aminci na ciki	ina
Nau'in aminci na ciki	ib
Nau'in mamayar mai	o
Nau'in cika yashi	q
Nau'in rufewa manne	m
N-Nau'i	n	An rarraba matakan kariya azaman MA da MB.
Nau'in Musamman	s	Rarraba ya ƙunshi nA, nR, da n-concave iri

Lura: Teburin yana nuna nau'ikan kariyar fashewar abubuwa don kayan lantarki, gabatar da haɗin hanyoyin kariya daban-daban don samar da nau'ikan kariyar fashewar matasan.

Misali, nadi “Ex demb” yana nuna nau'in kariyar fashewar matasan don kayan lantarki, hadawa hana wuta, ƙara aminci, da hanyoyin encapsulation.

Rarraba yankuna a wuraren da ke fuskantar haɗarin fashewar iskar gas:

A wuraren da iskar gas masu fashewa da m tururi yana haɗuwa da iska don samar da gaurayawan fashewar iskar gas, An kafa rarrabuwar shiyya uku dangane da matakin haɗari:

Yanki 0 (ake kira Zone 0): Wurin da bama-baman iskar gas ke ci gaba da haɗuwa, akai-akai, ko ci gaba da wanzuwa a cikin al'amuran al'ada.

Yanki 1 (ake kira Zone 1): Wuri inda mahaɗar iskar gas na iya faruwa a ƙarƙashin yanayi na al'ada.

Yanki 2 (ake kira Zone 2): Wurin da ba a sa ran gaurayawar iskar gas zai faru a cikin yanayi na al'ada, amma yana iya bayyana a taƙaice a lokacin abubuwan da ba su dace ba.

Lura: Yanayin al'ada yana nufin farawa na yau da kullun, rufewa, aiki, da kuma kula da kayan aiki, yayin da yanayi mara kyau ya shafi yuwuwar rashin aiki na kayan aiki ko
ayyuka na rashin hankali.

Dangantaka tsakanin wuraren da ke cikin haɗarin fashewar iskar gas da nau'ikan kariyar fashewar makamancin su.

Gas kungiyar	Matsakaicin gibin aminci na gwaji MESG (mm)	Mafi qarancin ma'aunin ƙonewa na yanzu MICR
IIA	MESG≥0.9	MICR ：0.8
IIB	0.9＞MESG：0.5	0.8≥MICR≥0.45
IIC	0.5Ƙungiyar MESG	0.45Bayani:MICR

Lura: La'akari da takamaiman yanayi a cikin ƙasarmu, da amfani da e-type (ƙara aminci) kayan lantarki sun iyakance zuwa Yanki 1, kyale don:

Akwatunan waya da akwatunan haɗin gwiwa waɗanda ba sa haifar da tartsatsi, baka, ko yanayin zafi mai haɗari yayin aiki na yau da kullun ana rarraba su azaman nau'ikan d ko m na jiki da nau'in e don sashin wayoyi..

Misali, Tsarin kariya na fashewa na BPC8765 LED fashewar hasken dandamali shine Ex demb IIC T6 GB. Wurin tushen hasken wuta ba ya da wuta (d), sashin da'ira na direba yana kunshe (mb), da fasalulluka na wayoyi ƙara aminci (e) don ginawa mai hana fashewa. Kamar yadda bayanin da aka ambata, ana iya amfani da wannan haske a Zone 1.

II

Nau'in kayan aiki na na'urar lantarki mai hana fashewa tana ƙayyade dacewarsa ga takamaiman mahalli mai fashewa.
Ana bayyana kayan da ke hana fashewa a matsayin na'urorin lantarki waɗanda, ƙarƙashin ƙayyadaddun yanayi, kar a kunna abubuwan fashewar da ke kewaye.

Don haka, samfuran da aka yi wa laƙabi tare da ƙayyadaddun ƙayyadaddun abubuwan fashewa (EX demb IIC) sun dace da duk mahalli masu fashewa, ban da ma'adinan kwal da wuraren karkashin kasa.

C

Rukunin iskar gas na na'urar lantarki mai tabbatar da fashewa tana ƙayyade dacewarsa da takamaiman gaurayawar iskar gas.

Ma'anar Gas Group:

A cikin duk mahalli masu fashewa, sai dai ma'adinan kwal da wuraren karkashin kasa (i.e, yanayin da ya dace da kayan lantarki na Class II), iskar gas mai fashewa an kasasu kashi uku, wato A, B, kuma C, dangane da matsakaicin tazarar aminci na gwaji ko mafi ƙarancin ƙarar wuta na yanzu na gaurayawan gas. Ƙungiyar iskar gas da zafin wuta sun dogara ne akan ƙaddamarwar iskar gas mai ƙonewa da iska ƙarƙashin ƙayyadaddun yanayin yanayin muhalli da yanayin matsa lamba.

Dangantaka tsakanin hadakar iskar gas mai fashewa, kungiyoyin gas, da matsakaicin gibin aminci na gwaji ko mafi ƙarancin wuta na halin yanzu:

Gas kungiyar	Matsakaicin gibin aminci na gwaji MESG (mm)	Mafi qarancin ma'aunin ƙonewa na yanzu MICR
IIA	MESG≥0.9	MICR ：0.8
IIB	0.9＞MESG：0.5	0.8≥MICR≥0.45
IIC	0.5Ƙungiyar MESG	0.45Bayani:MICR

Lura: Tebur na hagu yana bayyana cewa ƙananan ƙima na gibin aminci na gas mai fashewa ko mafi ƙarancin ƙimar halin yanzu yayi daidai da manyan matakan haɗari masu alaƙa da iskar gas mai fashewa.. Don haka, akwai ƙarin buƙatar buƙatun haɗakar iskar gas a cikin na'urorin lantarki masu hana fashewa.

Ƙungiyoyin iskar gas yawanci suna da alaƙa da iskar gas/masu fashewa:

Ƙungiyar gas / ƙungiyar zafin jiki	T1	T2	T3	T4	T5	T6
IIA	Formaldehyde, toluene, methyl ester, acetylene, propane, acetone, acrylic acid, benzene, styrene, carbon monoxide, ethyl acetate, acetic acid, chlorobenzene, methyl acetate, sinadarin chlorine	Methanol, ethanol, ethylbenzene, propanol, propylene, butanol, butyl acetate, amyl acetate, cyclopentane	Pentane, pentanol, hexane, ethanol, heptane, octane, cyclohexanol, turpentine, nafita, man fetur (ciki har da mai), man fetur, Pentanol tetrachloride	Acetaldehyde, trimethylamine		Ethyl nitrite
IIB	Propylene ester, dimethyl ether	Butadiene, epoxy propane, ethylene	Dimethyl ether, acrolein, hydrogen carbide
IIC	Hydrogen, ruwa gas	Acetylene			Carbon disulfide	Ethyl nitrate

Misali: A cikin yanayin inda abubuwa masu haɗari da ke cikin yanayi mai fashewa sune hydrogen ko acetylene, rukunin iskar gas da aka sanya wa wannan muhalli an kasafta shi a matsayin rukuni na C. Sakamakon haka, kayan lantarki da aka yi amfani da su a cikin wannan saitin yakamata su bi ƙayyadaddun rukunin gas na ƙasa da matakin IIC.

A cikin yanayin da abin da ke cikin yanayin gas mai fashewa shine formaldehyde, rukunin iskar gas da aka keɓe don wannan mahalli an rarraba shi azaman rukunin A. Sakamakon haka, kayan lantarki da aka yi amfani da su a cikin wannan saiti ya kamata su bi ƙayyadaddun rukunin gas na aƙalla matakin IIA. Duk da haka, Hakanan ana iya amfani da kayan lantarki tare da matakan ƙungiyar gas na IIB ko IIC a cikin wannan mahalli.

T6

The zafin jiki Ƙungiyar da aka sanya wa na'urar lantarki mai hana fashewa tana ƙayyade yanayin gas wanda ya dace da yanayin zafi..

An bayyana ƙungiyar zafin jiki kamar haka:

Iyakar zafi, ake magana da shi azaman zafin wuta, akwai don haɗakar gas mai fashewa, ayyana yanayin zafin da zasu iya kasancewa ƙonewa. Sakamakon haka, takamaiman buƙatu suna sarrafa yanayin zafin saman kayan lantarki da ake amfani da su a cikin waɗannan mahalli, yana buƙatar cewa matsakaicin zafin jiki na kayan aiki bai wuce zafin wuta ba. A kan haka, kayan lantarki an kasasu kashi shida, T1-T6, dangane da mafi girman yanayin yanayin su.

Ƙunƙarar zafin jiki na abubuwa masu ƙonewa	Matsakaicin zafin jiki na T na kayan aiki (℃)	Ƙungiyar zafin jiki
t 450	450	T1
450≥t = 300	300	T2
300≥t = 200	200	T3
200≥t＞135	135	T4
135≥t 100	100	T5
100≥t＞85	85	T6

Dangane da bayanin da aka bayar a teburin hagu, ana iya ganin kyakkyawar dangantaka tsakanin zafin wuta na abubuwa masu ƙonewa da kuma daidaitattun buƙatun ƙungiyar zafin jiki don na'urorin lantarki masu tabbatar da fashewa.. Musamman, yayin da zafin wuta ya ragu, Bukatun akan rukunin zafin jiki na na'urorin lantarki suna ƙaruwa.

Rarraba zafin jiki ya yi daidai da iskar gas/kayayyaki masu fashewa da aka saba ci karo da su:

Ƙungiyar gas / ƙungiyar zafin jiki	T1	T2	T3	T4	T5	T6
IIA	Formaldehyde, toluene, methyl ester, acetylene, propane, acetone, acrylic acid, benzene, styrene, carbon monoxide, ethyl acetate, acetic acid, chlorobenzene, methyl acetate, sinadarin chlorine	Methanol, ethanol, ethylbenzene, propanol, propylene, butanol, butyl acetate, amyl acetate, cyclopentane	Pentane, pentanol, hexane, ethanol, heptane, octane, cyclohexanol, turpentine, nafita, man fetur (ciki har da mai), man fetur, Pentanol tetrachloride	Acetaldehyde, trimethylamine		Ethyl nitrite
IIB	Propylene ester, dimethyl ether	Butadiene, epoxy propane, ethylene	Dimethyl ether, acrolein, hydrogen carbide
IIC	Hydrogen, ruwa gas	Acetylene			Carbon disulfide	Ethyl nitrate

Lura: Bayanan da aka bayar a teburin da ke sama don dalilai ne kawai. Da fatan za a bincika cikakkun buƙatun da aka zayyana a GB3836 don ingantaccen aiki.

Misali: Idan carbon disulfide shine abu mai haɗari a cikin mahalli mai fashewa, ya dace da rukunin zafin jiki T5. Sakamakon haka, Ƙungiyar zafin jiki na kayan lantarki da ake amfani da su a cikin wannan yanayi ya kamata ya zama T5 ko mafi girma. Hakazalika, idan formaldehyde shine abu mai haɗari a cikin mahalli mai fashewa, ya dace da rukunin zafin jiki T2. Saboda haka, rukunin zafin jiki na kayan lantarki da ake amfani da su a cikin wannan yanayin yakamata su kasance T2 ko sama. Ya kamata a ambata cewa ana iya amfani da kayan lantarki tare da kungiyoyin zazzabi na T3 ko T4 a cikin wannan yanayin.

GB

Matsayin kariyar kayan aiki yana nuna matakin kariya ga na'urorin lantarki mai hana fashewa, yana nuna ƙimar aminci na kayan aiki.
An ba da ma'anar matakin kariyar kayan aiki don mahalli mai fashewa a cikin sashe 3.18.3, 3.18.4, kuma 3.18.5 GB3836.1-2010.

3.18.3

Ga Level EPL Ga

Kayan aikin da aka yi niyya don mahalli mai fashewa yana da fasali a “babba” matakin kariya, tabbatar da cewa baya aiki azaman tushen kunnawa yayin aiki na yau da kullun, kuskuren da ake tsammani, ko rashin aiki na musamman.

3.18.4

Matsayin GB EPL Gb

Kayan aikin da aka yi niyya don mahalli masu fashewa suna da fasalin a “babba” matakin kariya, bada garantin cewa baya aiki azaman tushen kunnawa yayin aiki na yau da kullun ko yanayin kuskuren da ake tsammani.

3.18.5

Matsayin Gc EPL Gc

Kayan aikin da aka yi nufin amfani da su a cikin mahallin iskar gas mai fashewa suna nuna a “na gaba ɗaya” matakin kariya kuma baya aiki azaman tushen kunnawa yayin aiki na yau da kullun. Hakanan za'a iya aiwatar da ƙarin matakan kariya don tabbatar da cewa baya ƙonewa yadda yakamata a cikin yanayin da ake sa ran samun wutar lantarki akai-akai., kamar a yanayin rashin aiki na hasken wuta.