Fashewar Shenhai-Hujja
Bari mu fara da bayyana ma'auni daban-daban masu tabbatar da fashewa, abin da suke nunawa, da yadda ake zabar su a aikace, ta amfani da akwatunan rarraba abubuwan fashewa a matsayin misali.
| 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 |
Takaddun shaida:
Ex d IIB T4 Gb/Ex tD A21 IP65 T130°C takardar shaida ce ta duniya don kariyar fashewar gas da ƙura., inda bangaren kafin yankewa (/) yana nuna matakin hana fashewar iskar gas, kuma sashin bayan slash yana nuna alamar fashewar ƙura.
Ex: Alamar hana fashewa, daidaitaccen tsarin IEC (Hukumar Fasaha ta Duniya) fashe-hujja ratings.
d: Mai hana wuta nau'in, yana nuna ainihin nau'in kariyar fashewar wuta ne.
IIB: Yana wakiltar kariyar fashewar gas Class B.
T4: Yana nuna zafin jiki aji.
Gb: Yana nuna wannan samfurin ya dace da Yanki 1 kariyar fashewa.
Domin fashewar kura bangare a karshen rabin, ya isa ya cimma matsayi mafi girman kariya na ƙura 6 bisa ga ka'idojin fashewar gas.
tD: Yana wakiltar nau'in kariyar shinge (hana ƙurar ƙura tare da shinge).
A21: Yana nuna yankin da ya dace, dace da Zone 21, Yanki 22.
IP65: Yana wakiltar darajar kariya.
Yana da mahimmanci a zaɓi madaidaicin ƙimar fashewa a cikin ainihin mahalli.
Na farko, yana da mahimmanci a fahimci manyan nau'i biyu, kamar yadda aka bayyana a kasa:
Nau'in hana fashewa:
Darasi na I: Kayan aikin lantarki don ma'adinan kwal a karkashin kasa;
Darasi na II: Kayan lantarki ga duk sauran m muhallin iskar gas sai ma'adinan kwal da karkashin kasa.
Za a iya raba Class II zuwa IIA, IIB, da IIC, inda za a iya amfani da kayan aiki masu alamar IIB a ƙarƙashin yanayin da suka dace da na'urorin IIA; Ana iya amfani da IIC a ƙarƙashin yanayin da ya dace da IIA da IIB.
Darasi na III: Kayan aikin lantarki don mahallin ƙura masu fashewa ban da ma'adinan kwal.
IIIA: Yawo mai konawa; IIIB: Ƙura mara amfani; IIIC: Ƙura mai aiki.
Wuraren da ke hana fashewa:
Yanki 0: Inda iskar gas masu fashewa suke ko da yaushe ko akai-akai; ci gaba da haɗari ga fiye da 1000 hours / shekara;
Yanki 1: Ina m iskar gas na iya faruwa yayin aiki na yau da kullun; na ɗan lokaci mai haɗari ga 10 ku 1000 hours / shekara;
Yanki 2: Inda iskar gas mai ƙonewa ba su kasance ba kuma, idan sun faru, mai yiyuwa ne ba su da yawa kuma ba su daɗe ba; mai haɗari ba don 0.1 ku 10 hours / shekara.
Yana da mahimmanci a lura cewa muna hulɗa da Class II da III, Yanki 1, Yanki 2; Yanki 21, Yanki 22.
Yawanci, kai IIB ya wadatar da iskar gas, amma don hydrogen, acetylene, da kuma carbon disulfide, Ana buƙatar babban matakin IIC. Don kariyar fashewar ƙura, kawai cimma daidaitaccen iskar gas matakin tabbatar da fashewa kuma mafi girman ƙura.
Hakanan akwai nau'in haɗin gwiwa akwatin rarraba-hujja rating: ExdeIIBT4Gb.