Shenzhen ZhongNuo Inspection Technology Co., Ltd. offers on-site explosion-proof electrical inspection, explosion-proof project acceptance services, and consulting. We also provide explosion-proof rectification and construction services for items that fail inspection.
Explosion-proof Site Safety Inspection Standards
1. GB 50058-2014 "Code for Design of Electrical Installations in Explosive Hazardous Environments"
2. GB 3836.14-2014 "Part 14: Classification of Explosive Atmospheres - Explosive Gas Atmospheres"
3. AQ 3009-2007 "Electrical Explosion Protection Safety Regulations for Hazardous Areas"
4. GB 50257-2014 "Installation Engineering of Electrical Equipment, Construction and Acceptance of Electrical Equipment for Explosive and Fire Hazardous Environments"
5. GB15577-2018 "Safety Code for Dust Explosion Prevention"

Do explosion-proof areas require regular inspections? Which standard specifies this?
Installation and use of explosion-proof equipment is a basic requirement in areas with explosive hazards. In addition, there must be strict explosion-proof requirements for wiring, grounding, ventilation, wall penetration, explosion relief, and anti-explosion in such locations.
Do these locations require regular inspections?
Yes. In accordance with the requirements of AQ 3009-2007 "Electrical Safety and Explosion Proof Regulations for Hazardous Areas," in addition to regular daily inspections, these locations must undergo periodic explosion-proof inspections by a qualified third-party organization to ensure their safety.

Does explosion-proof electrical equipment require an explosion-proof acceptance after installation?
Many corporate clients are puzzled: Does the installation of electrical equipment with a valid and genuine explosion-proof certification mean it can be used normally?
Does using explosion-proof equipment equate to the entire system being explosion-proof?
We understand that every product has its lifecycle, from production, market launch, end-user usage, wear and tear to obsolescence. As special equipment in a specialized industry, the lifecycle of explosion-proof equipment not only depends on the product itself but also on its installation methods, maintenance practices, and more. In reality, accidents often occur due to improper usage by users, leading to the failure of explosion-proof electrical equipment and causing explosions, which is a situation that deserves great vigilance.
Therefore, the installation and acceptance inspection of the newly introduced explosion-proof equipment is particularly necessary and important.
After the explosion-proof equipment is installed, an initial inspection should be conducted by a qualified inspection agency with explosion-proof inspection资质 prior to transferring the project to the user, to ensure the entire project's explosion-proof safety performance. The explosion-proof acceptance standards are based on mandatory standards such as AQ 3009, GB/T3836.15, GB/T3836.16, GB 50257, etc.
After the installation and acceptance of explosion-proof equipment, it is not a one-time solution. To ensure that the explosion-proof equipment remains in good working condition and can be safely used in hazardous areas for the long term, continuous supervision and regular inspections of the equipment in use are also necessary.
Continuous supervision should be conducted by the company's personnel, with corresponding inspection records kept, and any abnormal phenomena handled promptly.
Regular inspections should be entrusted to qualified inspection agencies, with intervals generally not exceeding 3 years. Enterprises should promptly implement explosion-proof rectification measures for items that do not meet inspection standards and file the third-party qualification agency's Report and rectification status with the安全生产监督管理部门.

After the explosion-proof project is completed, it requires a third-party institution with explosion-proof inspection qualifications (Shenzhen ZhongNuo Inspection Technology Co., Ltd.) to conduct the project acceptance. Only after passing the acceptance can the project be put into use.
Explosion-proof engineering acceptance content
1. The explosion-proof certificate number issued by the inspection unit must be marked on the label of explosion-proof electrical equipment.
2. The types, levels, and groups of explosion-proof electrical equipment should conform to the design.
3. The外壳 of explosion-proof electrical equipment should be free from cracks and damage; the paint should be intact. The cover of the junction box should be securely fastened, and the fixing bolts and anti-loosening devices should be in place.
4. The ventilation and exhaust systems of positive-pressure electrical equipment should be unobstructed, properly connected, and the inlet and outlet installation positions meet the requirements.
5. Excess electrical equipment entry ports should be sealed in accordance with regulations.
6. Installation of sealed devices in electrical circuits should comply with regulations.
7. Wiring engineering for inherently safe electrical equipment should comply with the design; the routes and elevations of the lines. The lines should be marked with a sky blue sign.
8. Electrical installations must have proper grounding or neutral bonding and static-dissipative wiring, in compliance with design specifications, ensuring solid and reliable grounding.
On-Site Explosion-Proof Electrical Equipment Regular Inspection Consulting Service - Shenzhen Zhongnuo Inspection Technology Co., Ltd.