Explosion proof electrical equipmentAccording to different usage locations, it is classified as Class IExplosion proof certificateClass II explosion-proof certificate and Class III explosion-proof certificate, etc.
The Class I explosion-proof certificate we refer to refers to the certification certificate used for underground equipment in coal mines, usually used together with the coal safety certificate of the equipment.
Class II explosion-proof certificate refers to the certification certificate for explosion-proof equipment used in non mining explosive gas environments. For example, equipment is used in places such as petrochemical, gas, and oil depots.
The Class III explosion-proof certificate refers to the certification certificate for explosion-proof equipment used in non mining explosive dust environments. For example, equipment is used in places such as painting, polishing, feed, food, etc.
From this, it can be seen that Class I, Class II, and Class IIIExplosion proof certificateThe main difference lies in the location where the equipment is used.
Domestic qualified explosion-proof certification institutions include Tianjin PCEC, Nanyang CNEX, Shanghai NEPSI, Shanghai Coal Science Institute, Changsha Mining Institute, Suzhou Electric Power Research Institute, Guangzhou Special Inspection Institute, etc.
At present, the domestic explosion-proof certification standards are mainly based on the GB3836 series. The original GB12476 (dust) and GB25286 (non electric) series standards have also been merged into GB3836.
Enterprises apply for testing in ZhongnuoExplosion proof certificationThe main drawing materials provided include schematic diagrams, assembly drawings, structural drawings, enterprise standards, instructions, etc., with 1-2 samples generally.
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