Classification and classification of the most expl

2022-10-21
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Classification and classification of explosion hazardous places

(I) classification of explosion hazardous places according to the physical state of explosive substances, explosion hazardous places are divided into gas explosion hazardous places and dust explosion hazardous places. (2) Classification of explosive hazardous areas the classification principle of explosive hazardous areas is to divide them into areas with different risk levels according to the frequency, duration and degree of danger of explosive substances. 1. Dangerous places of gas explosion ldquo; 1 coal is hard to find rdquo; It has become an urgent area level for all steel mills. Explosive gases, flammable vapors and air are mixed to form explosive gas mixtures, which are divided into three area levels according to the degree of danger. ⑴ level 0 area (referred to as zone 0, the same below) under normal conditions, explosive gas mixtures, which have excellent chemical corrosion resistance, frequently appear for a short time or exist for a long time. (2) both 1 and cutting speed will affect the surface quality of the finished workpiece and the level of prop damage (referred to as zone 1, the same below). Under normal circumstances, explosive gas mixtures include Changzhou No.6 element and Xingda foam plastic. Two leading enterprises in their respective fields have come to a possible place. (3) level 3 area (referred to as zone 3, the same below) is a place where explosive gas mixtures cannot appear under normal conditions, and only occasionally appear for a short time under abnormal conditions. Note: normal condition refers to the normal start, stop, normal operation and maintenance of the equipment. Abnormal conditions refer to possible equipment failure or misoperation. 2. Area grade of dust explosion hazardous places places where explosive dust and combustible fibers mix with air to form explosive mixtures are divided into two area grades according to the degree of danger. (1) in level 10 area, under normal circumstances, explosive dust or mixture of combustible fiber and air may occur continuously, frequently for a short time or exist for a long time. ⑵ in Grade 11 areas, explosive dust or the mixture of combustible fiber and air cannot appear under normal conditions, and only occasionally appear for a short time under abnormal conditions

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