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Uainishaji wa ushahidi wa mlipuko

MUDA: 2019-05-29 NYUMBANI: 34

utekelezaji

Sehemu zilizo na mazingira ya uwezekano wa kulipuka zimegawanywa katika maeneo, vifaa vinapaswa kugawanywa katika vikundi na vikundi. Kuweka alama kwenye sahani ya kitambulisho cha vifaa vya udhibitisho kunaonyesha vifaa ambavyo mlindaji wa mlipuko unaweza kutumika.


Gawanya katika vikundi vya bidhaa

Vifaa vimegawanywa katika kundi I na kikundi cha II. Kundi I lina vifaa vya chini ya ardhi na mikataba ya kikundi cha II inahusu matumizi mengine yote.


Gawanya katika maeneo

Maeneo yenye mazingira ya kulipuka ya hewa yamegawanywa katika maeneo sita kulingana na uwezekano wa jinsi ya mara kwa mara na kwa kipindi gani cha wakati ambapo mazingira ya kulipuka (pea) yapo.

A distinction is made between combustible gases, mists, vapors and combustible dust. For gases, mists and vapors zones 0, 1 and 2 exist, in which the requirements for the chosen equipment increase from zone 2 to 0. Equipment in zone 0 must be built in a way "that even if a type of protection fails or if two faults occur, that sufficient explosion protection is guaranteed". Therefore for example a passive, potential free sensor, installed in zone 0, and connected to an intrinsically safe electric circuit (II 2 (1) G [Ex ia] IIC), needs its own approval. Zones 20, 21 and 22 are for dust atmospheres, in which the requirements for the chosen equipment increase from zone 22 to 20. Equipment in zone 20 and 21 need special approval.


Ingiza na kuokoa!Barua pepe pekee ya pekee na vitu maalum vya upunguzaji wa wakati