Area 1 and Area 2 explosion-proof certifications are two levels in the classification of flammable and explosive gas environments, each representing different levels of danger and characteristics of gas presence duration. Below is a detailed explanation by Shenzhen ZhongNuo Testing Technology Co., Ltd. for these two areas:
Division 1 explosion-proof area
Definition:Area 1 explosion-proof refers to locations where, during normal operation, mixtures of flammable and explosive gases may occur. This means that due to various factors in the production, processing, and storage processes within this area, flammable and explosive gas mixtures may appear under normal operating conditions.
Gas Presence Duration:In the explosion-proof zone 1, the presence duration of flammable and explosive gases typically ranges from 10 to 1000 hours/year. This depends on various factors, such as production processes, equipment sealing, and ventilation conditions.
Risk Level:Due to the potential presence of flammable and explosive gas mixtures in the explosion-proof zone 1, the risk level in this area is relatively high. A series of explosion-proof measures must be implemented to ensure the safety of equipment and personnel.
Zone 2 - Intrinsically Safe Area
Definition:Zone 2 explosive atmosphere refers to an area where a mixture of flammable and explosive gases is unlikely to occur during normal operation, and if it does, it is only occasional and of short duration. This means that the presence of flammable and explosive gas mixtures in this zone is an abnormal occurrence and has a short duration.
Gas Presence Duration:In the explosion-proof Zone 2, the presence of flammable and explosive gases typically lasts less than 10 hours/year. This also depends on production processes, equipment sealing, ventilation conditions, and various other factors.
Risk Level:Due to the low probability and short duration of flammable and explosive gas mixtures occurring in the explosion-proof zone 2, the risk level in this area is relatively low. However, certain explosion-proof measures must still be implemented to ensure the safety of equipment and personnel, just in case.
Summary
In summary, the main difference between explosion-proof Zones 1 and 2 lies in the likelihood and duration of the presence of flammable explosive gas mixtures. Zone 1 poses a higher risk and requires stricter explosion-proof measures; however, Zone 2 has a relatively lower risk yet still necessitates appropriate explosion-proof precautions to ensure safety. In practical applications, the demarcation of explosion-proof areas and the corresponding measures should be determined based on specific production environments and process conditions.
