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Regarding the classification standards for explosion-proof levels, Shenzhen Zhongnuo Testing Technology Co., Ltd. can provide you with the following information:

Explosion proof electrical equipment is mainly divided into Class I, Class II, and Class III explosion-proof certificates according to the different places of use:

(1) Class I Explosion proof Certificate: This is a certification certificate used for underground equipment in coal mines. It is usually used in conjunction with the coal safety certificate of the equipment, indicating that the equipment can operate safely in a coal mine gas environment.

(2) Class II Explosion proof Certificate: This type of certification is applicable to explosion-proof equipment in non mining flammable and explosive gas environments. For example, equipment used in flammable and explosive places such as petrochemicals, gas, and oil depots must obtain a Class II explosion-proof certificate.

(3) Class III Explosion proof Certificate: This is a certification certificate for explosion-proof equipment used in non mining flammable and explosive dust environments. For example, equipment used in flammable and explosive places such as painting, polishing, feed, and food needs to obtain a Class III explosion-proof certificate.

In addition, the letters of the explosion-proof sign also have specific meanings. For example:

a. Ex： This is a symbol for electrical equipment used in gas environments.

b. ib： Indicates that the protection type is intrinsic safety type.

c. I： Indicates the gas environment of coal mines.

d. IIC： This device is suitable for IIC level gas and vapor environments.

e. T6： The temperature group is T6, which means that the maximum surface temperature of the equipment does not exceed 85 ° C.

When applying for explosion-proof certification, there are several points to note:

(1) The higher the explosion-proof rating, the better. It is necessary to choose the appropriate rating based on factors such as product structure, installation method, and usage location.

(2) Explosion proof level does not equal protection level (IP level), the two are different concepts.

(3) The lower the temperature group, the higher the safety of the equipment.

(4) The gas explosion-proof certificate cannot be used in dusty areas, and similarly, the dust explosion-proof certificate cannot be used in gas areas.

If you need more detailed explosion-proof certification information or technical support, please feel free to contact Shenzhen Zhongnuo Testing Technology Co., Ltd.