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Ukuhlukaniswa Kwezindawo Eziyingozi - eNyakatho Melika

ISIKHATHI: 2019-07-23 HITS: 83

Ukufakwa kwezinto ezisebenza ngogesi emkhathini okunamagesi avuthayo noma umhwamuko, uketshezi oluvuthayo, uthuli oluvuthayo, imicu evutha umlilo noma okundizayo kumelela ingozi yomlilo nokuqhuma.

Izindawo ezingaba sengozini yomlilo noma yokuqhuma ngenxa yokuqhuma komkhathi kanye/noma izingxube - zibizwa ngokuthi izindawo eziyingozi (noma ezihlukanisiwe) noma izindawo. Lezi zindawo ziseNyakatho Melika (e-United States nase-Canada) ngokomlando ezibekwe ngohlelo Lwekilasi/Isigaba. E-Europe nasemhlabeni wonke - kodwa futhi kakhulu eNyakatho Melika - uhlelo lweZone luyasetshenziswa.

Uhlelo lokuhlukanisa indawo eyingozi lunquma izindlela zokuvikela ezidingekayo nezindlela zokufakwa kukagesi endaweni.  

I-Class/Division System

Uhlelo Lwekilasi/Isigaba/Iqembu lusekelwe ku-Athikili 500 yeKhodi Kagesi Kazwelonke (NEC) lapho

· Amakilasi - ichaza imvelo evamile yezinto eziyingozi emkhathini ozungezile

· Ukwehlukana - kuchaza amathuba okuba khona kwezinto eziyingozi emkhathini ozungezile

· Amaqembu - achaza uhlobo lwezinto eziyingozi endaweni ezungezile

Class

Ikilasi lichaza imvelo evamile (noma izakhiwo) zezinto eziyingozi emkhathini ozungezile.

Class

Ubunjalo Bezinto Eziyingozi

I-Class I

Kuyingozi ngoba amagesi avuthayo noma umhwamuko akhona (noma angaba khona) ngamanani anele ukukhiqiza izingxube eziqhumayo noma ezivutha umlilo.

I-Class II

Kuyingozi ngoba izintuli ezivuthayo noma ezibambayo zikhona (noma zingase zibe khona) ngamanani anele ukukhiqiza izingxube eziqhumayo noma ezivutha umlilo.

I-Class III

Kuyingozi ngoba imicu evutha umlilo noma ukundiza kukhona (noma kungase kube khona) ngamanani anele ukukhiqiza izingxube eziqhumayo noma ezivutha umlilo.

division

Ukwahlukaniswa kuchaza amathuba okuba into eyingozi ibe khona ekugxiliseni okuvuthayo emkhathini ozungezile.

division

Amathuba Wezinto Eziyingozi

1 Division

Into okukhulunywa ngayo ngeklasi inethuba eliphezulu lokukhiqiza ingxube eqhumayo noma evutha umlilo ngenxa yokuthi ikhona ngokuqhubekayo, ngezikhathi ezithile, noma ngezikhathi ezithile noma kusukela.
imishini ngokwayo ngaphansi kwezimo ezijwayelekile zokusebenza.

2 Division

Into okukhulunywa ngayo ngekilasi inethuba eliphansi lokukhiqiza ingxube eqhumayo noma evutha umlilo futhi ikhona kuphela ezimweni ezingavamile isikhathi esifushane - njengokuhluleka kwesiqukathi noma ukuwohloka kwesistimu.

Group

Iqembu lichaza uhlobo lwezinto eziyingozi endaweni ezungezile.

Group

Uhlobo Lwezinto Eziyingozi

Iqembu A

Umkhathi oqukethe i-acetylene.

Iqembu B

I-atmosphere equkethe igesi evuthayo, uketshezi oluvuthayo olukhiqiza umhwamuko, noma uketshezi oluvuthayo olukhiqizwa umhwamuko oxutshwe nomoya ongasha noma uqhume, ube ne-MESG (Isikhala Esivikelekile Esiphezulu Sokuhlola)1) inani elingaphansi noma elilingana no-0.45 mm noma i-MIC (I-Minimum Igniting Current)2) isilinganiso esingaphansi noma esilingana no-0.40 - njenge-hydrogen noma uphethiloli namagesi enqubo evuthayo aqukethe ngaphezu kuka-30% i-hydrogen ngevolumu - noma amagesi engozi efanayo njenge-butadiene, i-ethylene oxide, i-propylene oxide ne-acrolein.

Iqembu C

I-atmosphere equkethe igesi evuthayo, uketshezi oluvuthayo olukhiqiza umhwamuko noma umhwamuko okhiqizwe uketshezi oluvuthayo i-MESG yawo ingaphezu kuka-0.75 mm noma isilinganiso se-MIC sikhulu kuno-0.40 futhi singaphansi kuka-0.80 - njenge-carbon monoxide, ether, hydrogen sulfide, morphline, cyclopropane , i-ethyl, i-isoprene, i-acetaldhyde ne-ethylene noma amagesi engozi efanayo.

Iqembu D

Umkhathi oqukethe igesi evuthayo, uketshezi oluvuthayo olukhiqizwe umhwamuko, noma uketshezi oluvuthayo olukhiqizwayo oluxutshwe nomoya ongasha noma uqhume, onenani le-MESG elingaphezu kuka-0.75 mm noma isilinganiso se-MIC esingaphezu kuka-0.80 - njengophethiloli, i-acetone, i-ammonia, i-benzene , i-butane, i-ethanol, i-hexane, i-methanol, i-methane, i-vinyl chloride, igesi yemvelo, i-naphtha, i-propane noma amagesi engozi efanayo.

Iqembu E

Umkhathi oqukethe izintuli zensimbi ezivuthayo, okuhlanganisa i-aluminium, i-magnesium, ithusi, i-chromium, i-titanium, i-zinc nama-alloy azo ezentengiselwano noma ezinye izintuli ezivuthayo usayizi wezinhlayiyana zazo, ukuhuzuka nokuhamba kwazo okwethulwa izingozi ezifanayo ngokuphathelene nezinto zikagesi.

Iqembu F

Umkhathi oqukethe izintuli ze-carbonaceous, i-carbon black, emnyama yamalahle, yamalahle, amalahle noma izintuli ze-coke ezinezivunguvungu ezibanjiwe ezingaphezu kuka-8% eziye zavinjelwa ezinye izinto ukuze zilethe ingozi yokuqhuma.

Iqembu G

Umkhathi oqukethe uthuli oluvuthayo olungafakiwe kuQembu E & F - njengofulawa, okusanhlamvu, isitashi, ushukela, ukhuni, amapulasitiki namakhemikhali.

1) I-MESG (Igebe Eliphephile Lokuhlola Eliphezulu) - Ubukhulu bokuvuleka phakathi kwezindawo ezimbili zensimbi ezifanayo ezitholwe ngaphansi kwezimo zokuhlola ezishiwo ukuvimbela ukuqhuma kwegumbi lokuhlola ukuthi lisatshalaliswe egumbini lesibili eliqukethe igesi efanayo noma umhwamuko ngesikhathi esifanayo. ukugxilisa ingqondo.


2) I-MIC (Minimum Igniting Current) Ratio - Isilinganiso senani elincane lamanje elidingekayo ekukhishweni kwenhlansi engenisayo ukuze kuthungele ingxube evutha kalula yegesi noma umhwamuko, ihlukaniswe ubuncane bamanje obudingekayo ekukhishweni kwenhlansi engenisa amandla ukuze kuthungele i-methane ngaphansi. izimo zokuhlola ezifanayo.


Amaqembu A, B, C, kanye no-D awegesi (Ikilasi I kuphela). Amaqembu E, F, kanye no-G ngawezintuli nokundiza (Ikilasi II noma III).

Izinto ezithile eziyingozi ngaphakathi kweqembu ngalinye kanye nezinga lokushisa elizenzakalelayo lokuvutha kungatholakala ku-Athikili 500 yeKhodi Kagesi Kazwelonke kanye naku-NFPA 497.


Zone System

Uhlelo lweZone lusekelwe ku-Athikili 505/506 yeKhodi Kagesi Kazwelonke (NEC) futhi ilandela indlela yamazwe ngamazwe yokuhlukaniswa kwendawo njengoba ithuthukiswe yi-International Electrotechnical Commission (IEC).

· Izindawo - ichaza imvelo evamile (noma izakhiwo) zezinto eziyingozi - uma igesi noma uthuli, kanye namathuba ezinto eziyingozi endaweni ezungezile

· Amaqembu - achaza uhlobo lwempahla eyingozi kanye (ingxenye) nendawo yomkhathi ozungezile


Zone

I-Zone ichaza imvelo evamile - uma kuyigesi noma uthuli - kanye namathuba ezinto eziyingozi ezikhona ekuhlanganiseni okungashi emkhathini ozungezile. Uhlelo lweZone lunamazinga amathathu engozi yegesi noma uthuli lapho uhlelo lweDivishini lunamabili.

Amagesi, Izihwamuko kanye Nenkungu

I-athikili 505 Ikhodi Kagesi Kazwelonke (NEC)

Zone

Imvelo kanye Namathuba Wezinto Eziyingozi

Indawo ye-0

Ukugxila okungabasi kwamagesi avuthayo noma izihwamuko ezikhona ngokuqhubekayo noma isikhathi eside.

Indawo ye-1

Ukugxila okungabasi kwamagesi avuthayo noma umhwamuko okungenzeka wenzeke ngaphansi kwezimo ezivamile zokusebenza.

Indawo ye-2

Ukugxila okungabasi kwamagesi avuthayo noma umhwamuko okungeke kwenzeke ngaphansi kwezimo ezivamile zokusebenza futhi kwenze lokho isikhathi esifushane kuphela.

Izintuli

I-athikili 506 Ikhodi Kagesi Kazwelonke (NEC)

Zone

Imvelo kanye Namathuba Wezinto Eziyingozi

Indawo ye-20

Indawo lapho uthuli oluvuthayo noma imicu evuthayo nokundiza kukhona khona ngokuqhubekayo noma isikhathi eside.

Indawo ye-21

Indawo lapho uthuli oluvuthayo noma imicu evuthayo kanye nokundiza kungenzeka kwenzeke ngaphansi kwezimo ezivamile zokusebenza.

Indawo ye-22

Indawo lapho uthuli oluvuthayo noma imicu evuthayo kanye nokundiza kungenzeki khona ngaphansi kwezimo ezivamile zokusebenza futhi kwenze lokho isikhathi esifushane kuphela.

Izindawo ziqhathaniswa namakilasi nezigaba ohlelweni Lwekilasi/Isigaba.


Group

Iqembu lichaza uhlobo lwezinto eziyingozi kanye (ingxenye) nendawo yomkhathi ozungezile. Iqembu lihlukaniswe ngamaqembu amathathu lapho iQembu I ligcinelwe izindawo zezimayini. Iqembu II lenzelwe amagesi aqhumayo (Indawo 0, 1 kanye no-2) kanti Iqembu III lingelezintuli eziqhumayo (Zone 20, 21 and 22).

Group

Uhlobo Lwezinto Eziyingozi kanye Nendawo Yomkhathi

Iqembu I


Amaminithi
ukungenwa yi-firedamp (ingxube evuthayo yamagesi eyenzeka ngokwemvelo emayini).

Iqembu II


Ukuqhuma kwegesi
umkhathi ngaphandle kwezimayini ungenwa kalula yi-firedamp. Imishini yeQembu II ihlukaniswe yaba izingxenye ezintathu.


A

Ama-atmosphere aqukethe i-propane, i-acetone, i-benzene, i-butane, i-methane, uphethiloli, i-hexane, izinyibilikisi zikapende noma amagesi kanye nezihwamuko zengozi efanayo.


B

Ama-atmosphere aqukethe i-ethylene, i-propylene oxide, i-ethylene oxide, i-butadiene, i-cyclopropane, i-ethyl ether, noma amagesi nezihwamuko zengozi efanayo.


C

Ama-atmosphere aqukethe i-acetylene, i-hydrogen, i-carbon disulphide noma amagesi nezihwamuko zengozi efanayo.

Iqembu III


Uthuli oluqhumayo 
umkhathi. Imishini yeQembu III ihlukaniswe yaba amaqoqo amancane amathathu.


A

Umkhathi oqukethe izindiza ezivuthayo.


B

I-Atmosphere equkethe uthuli olungaqhubeki.


C

I-Atmosphere equkethe uthuli oluqhutshwayo.

Isibonelo - Ukuhlukaniswa Kwendawo Eyingozi

Igumbi elinokufakwa kwegesi ye-propane ngokuvamile lizohlukaniswa ne

· Uhlelo lwekilasi/Isigaba njengokuthi: Ikilasi I, Isigaba 2, Iqembu D

· Uhlelo lwendawo njenge: Zone 2, Group IIA


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