For a long time, China's national standards related to explosion-proof electrical safety mainly include the basic explosion-proof electrical standard GB3836 series, manufacturing and inspection standards, and explosion-proof electrical product standards. These standardsZhongnuo TestingThe implementing entities are product manufacturing enterprises and explosion-proof electrical product quality inspection institutions. However, whether explosion-proof electrical products can ensure explosion-proof safety when used in hazardous areas depends not only on the design, manufacturing, and inspection departments providing products with high explosion-proof safety, but also on the safe use of product user departments. No matter how good the performance and quality of explosion-proof electrical products are, if used improperly, they not only fail to play an explosion-proof role, but may even become a terrible killer that endangers safety. Many painful onesZhongnuo TestingThe explosion accidents have all proven this point. For example, the rubber sealing ring in the cable entry device of explosion-proof electrical products is an important part to maintain the explosion-proof performance of the product. This part is often overlooked in use and cannot be selected, installed, and maintained correctly. If some users do not tighten it after maintenance, some choose sealing ring sizes and materials that do not meet the standard requirements, and some simply do not install the sealing ring after maintenance. As a result, combustible gases in hazardous areas can enter the cavity of the junction box unobstructed. Once there is an arc spark at the connection of the wiring terminals inside the junction box, it may ignite flammable gases and cause an explosion. Examples of explosion accidents caused by unsafe use of explosion-proof electrical products account for a large proportion in the overall statistics of explosion accidents.
It can be seen that the safe use of explosion-proof electrical products and the manufacturing quality that reflects the safety performance of explosion-proof electrical products are equally important.
So, how to minimize the incorrect installation and use of explosion-proof electrical equipment—— Explosion proof on-site safety inspection
Explosion proof electrical equipment often experiences various problems of explosion-proof failure during long-term use. For example, corrosion damage to explosion-proof casings, damage caused by unreasonable installation, shell fracture damage caused by excessive temperature, and failure of protective casings caused by perforated wiring on explosion-proof casings......
Regular on-site inspections of explosion-proof electrical equipment in use are not only a requirement of the safety production department, but also a concern for the company's own life and property safety.
According to Section 7 of AQ3009-2007 "Electrical Explosion Protection Safety Code for Hazardous Areas", electrical equipment used in hazardous areas should undergo initial and periodic inspections
Regular safety inspections of installed explosion-proof electrical equipment are the most basic requirement to ensure the safety of explosion-proof electrical equipment. So, what standard specifications should be followed for safety inspections of explosion-proof electrical equipment on site?
GB 50058-2014 "Design Code for Electrical Equipment in Explosive Hazardous Environments"
GB 3836.14-2014 Explosive Atmospheres Part 14: Classification of Places Explosive Gas Environments
AQ 3009-2007 "Safety Code for Electrical Explosion Protection in Hazardous Areas"
GB 50257-2014 Electrical Equipment Installation Engineering, Construction and Acceptance of Electrical Equipment in Explosive and Fire Hazardous Environments
GB15577-2018 Safety Regulations for Dust Explosion Prevention
GB12476.2-2010 Electrical Equipment for Combustible Dust Environments Part 2: Selection and Installation
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