How to choose explosion protection and protection rating
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This post was last edited by jacob451 on 2011-3-4 13:01. When selecting various instruments, how should one choose the explosion protection rating and the protection level? Please give some advice!
Safety and reliability principle: The class, grade, and group of the equipment shall be appropriate for the explosive environment in which it is used. Economy principle: There is no need to choose the most expensive equipment; for products of the same grade, factors such as price, lifespan, reliability, operating costs and energy consumption, as well as the availability of spare parts, should be taken into consideration. Principle of environmental adaptability: Consider environmental temperature, humidity, and atmospheric pressure ； Enclosure protection rating and corrosion resistance, etc. Maintainability principle: Under equal conditions, products with a simple structure and light weight should be chosen ； When necessary, system operation requirements should also be taken into account; for example, in continuous automation systems, intrinsically safe products should be given priority.
Reply to 2# liuliwen: Hello, could you give an example of how the selection is made to explain it? Thank you for your advice!
China’s classification of explosion-proof areas is based on standard GB 50058, while the protection rating of enclosures is determined according to standard GB 4208; these are two entirely different concepts. . .