Shenzhen Zhongnuo Inspection Technology Co., Ltd. offers on-site explosion-proof electrical inspection, explosion-proof project acceptance services, and can provide explosion-proof rectification and construction services for items not meeting inspection standards.
The "Electrical Explosion Proof Inspection Report" issued from regular inspections of explosion-proof electrical equipment is based on standards including but not limited to:
GB 50058-2014 "Code for Design of Electrical Installations in Explosive Hazardous Environments"
GB50257-2014 "Code for Construction and Acceptance of Electrical Installations in Explosive and Fire Hazardous Environments"
GB/T3836.15-2017 "Electrical Equipment for Explosive Gas Atmospheres — Part 15: Electrical Installations in Hazardous Areas (Excluding Coal Mines)"
AQ3009-2007 Electrical Explosion-Proof Safety Standard for Hazardous Locations

What certifications are required for regular inspections of explosion-proof electrical equipment?
The regular inspection of explosion-proof electrical equipment, as mentioned in the previous section, in accordance with the AQ 3009-2007 "Electrical Safety and Explosion-Proof Regulations for Hazardous Areas," must be conducted by a testing center with explosion-proof professional qualifications. This qualification is authorized by the CNAS and can be verified on the CNAS website.

Standards and cycles for regular inspections of explosion-proof electrical equipment
With the increasing popularity of explosion-proof electrical equipment, such devices are now installed and used in many explosive hazardous areas.
Many end-users believe that as long as explosion-proof electrical equipment is installed in explosive hazardous areas, everything is settled.
In many cases, so-called explosion-proof electrical appliances do not have a valid explosion-proof certificate, or the certificate has expired or is counterfeit. The label does not match the explosion-proof certificate.
Selection of explosion-proof type is incorrect, mixing of gas explosion-proof electrical equipment with dust explosion-proof electrical equipment, improper wiring of explosion-proof electrical equipment installation, lack of grounding of the circuit.
Holes in explosion-proof casings and button installations can lead to explosion-proof failure. Long-term exposure to corrosion, high temperatures, and intense vibrations can also compromise explosion-proof electrical equipment.
For explosion-proof electrical equipment in use, the AQ 3009-2007 "Electrical Safety and Explosion-proof Code for Hazardous Areas" standard stipulates:
Electrical equipment for explosion-proof use should be inspected at least once every 3 years by a certified inspection center specializing in explosion-proof services, to check its performance, installation, and maintenance, etc.
Immediate corrective actions must be taken for non-conformities identified during inspections, and the inspection report and corrective measures must be filed with the Safety Production Supervision and Administration Department.
Conducting explosion-proof site inspections on electrical equipment in use is not only a requirement of the safety production department, but also a manifestation of a company's emphasis on its own life and property safety.

Required Documents for On-Site Explosion-Proof Inspection Application
1. Area of explosion-proof facility;
2. Explosion Hazard Area Division Diagram
3. Names of explosive hazardous substances within the relevant danger zones, along with their Material Safety Data Sheets (MSDS)
4. List of explosion-proof electrical products, including installation areas and tag numbers, etc.
5. Copies of explosion-proof electrical products' explosion-proof certification
6. Instructions for Special Usage Conditions of Explosion-Proof Electrical Equipment
7. Descriptive Technical Document for Intrinsically Safe System
8. Relevant documents concerning installation quality
On-site Explosion-proof Electrical Equipment Regular Inspection Consultancy Service - Shenzhen ZhongNuo Inspection Technology Co., Ltd.