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.
Regulations and laws governing regular inspections of explosion-proof electrical equipment:
Flameproof equipment used in explosive hazardous areas throughout its entire lifecycle, including production, installation, use, inspection, maintenance, and withdrawal from the market,
Regular inspections provide a robust guarantee for their operational condition and explosion-proof safety performance. Relevant laws and regulations in our country also have corresponding provisions on this matter.
There is a clear stipulation in the standard AQ3009-2007 "Electrical Safety and Explosion-Proof Regulations for Hazardous Areas":
Regular inspections should be entrusted to safety production inspection agencies with explosion-proof professional qualifications, with the interval generally not exceeding 3 years.
Companies should take corrective actions promptly based on the inspection results and report the inspection report and rectification status to the department of安全生产 supervision and management for record.
The preface of AQ3009-2007 "Electrical Safety and Explosion-Proof Regulations for Hazardous Areas" also explicitly states that Chapters 4, 5, 6, and 7 are mandatory and must be strictly enforced. Therefore, such safety regulations are also part of the legal and regulatory framework and must be strictly enforced!

Application Agency for Explosion-Proof Electrical Construction Completion and Acceptance Report
It's widely known that after electrical work in explosive hazard areas is completed, a third-party organization must conduct a final inspection before the facility can be put into use. Furthermore, in addition to regular checks by the company itself, a facility with explosion-proof inspection qualifications must perform periodic inspections every three years.
Here, we first share what the main items are for the acceptance inspection after completion?
1. Check if the explosion-proof electrical equipment has a label, Ex symbol, and clear identification of the type, class, and group of the explosion-proof equipment. Is the certificate number of the explosion-proof qualification issued by the inspection unit marked on the label?
2. Verify that the type, class, group, environmental conditions, and special markings of explosion-proof electrical equipment comply with regulations.
3. Inspect the casing of explosion-proof electrical equipment for cracks or damage; ensure the paint is intact, that the junction box cover is securely fastened, and that the fixing bolts and anti-loosening devices are in place.
4. Check for oil leakage and seepage in oil-filled electrical equipment, and ensure the oil level meets the requirements.
5. Ventilation and exhaust systems of explosion-proof electrical equipment with positive pressure should be unobstructed, connections should be correct, and the installation positions of the inlets and outlets should meet the requirements.
6. Are the extra entry ports of the explosion-proof electrical equipment properly sealed in accordance with regulations?
7. The installation of sealed or insulated devices in electrical circuits should comply with regulations.
8. Wiring projects for intrinsically safe explosion-proof electrical equipment must comply with design requirements for routing and elevation; the lines should be marked with a sky blue sign.
9. The grounding or earthing of explosion-proof electrical equipment, as well as static electricity grounding, should meet the design requirements and be firm and reliable.
10. Upon completion and acceptance, the relevant documents, materials, manufacturer's product user manuals, test records, qualification certificates, and installation drawings, among other technical files, should be submitted.
11. At the time of inspection, the following measurement records should also be submitted:
Measurement records of single-side air gap for explosion-proof motor stator and rotor.
(2) Adjustment records for pressure-relief devices protecting explosion-proof electrical equipment against wind and air pressure, high-temperature records of the equipment's housing during trial operation, and test records of static-dissipative grounding resistance values.
12. Explosion-proof electrical equipment operation records
The shell temperature of explosion-proof electrical equipment, including internal temperatures of intrinsically safe and non-sparking explosion-proof electrical equipment, should not exceed the specified limit.
(2) After the internal wiring of the junction box is securely fastened, the electrical clearances and creepage distances between live parts and the metal housing should comply with the regulations.
(3) Exhaust outlets of explosion-proof electrical equipment with positive pressure should not emit sparks. The micro-pressure relay should operate reliably when reducing air pressure and wind pressure.
(4) The protective devices and interlock devices of explosion-proof electrical equipment should operate correctly and reliably.

How often should explosion-proof electrical equipment be inspected? How to apply for an explosion-proof electrical equipment inspection report?
Should explosion-proof electrical equipment in use be inspected regularly? How often should a check report be issued? What are the explicit standards, and how are they stipulated? These are questions that many clients with explosive hazards in industries like chemicals, grain and oil, and gas stations are eager to know. China Nu Inspection answers these questions simply for you.
Due to the industry's特殊性, facilities with explosive hazards must purchase and install equipment with a valid explosion-proof certification, and ensure proper installation and maintenance. In addition, regular safety checks and routine maintenance of these electrical equipment must be conducted to confirm their continued explosion-proof performance. The AQ3009-2007 "Safety Code for Electrical Explosion Prevention in Hazardous Areas" also stipulates that periodic inspections should be carried out by safety inspection and testing institutions with explosion-proof qualifications, with intervals generally not exceeding 3 years.
ZhongNuo Inspection has provided on-site explosion-proof inspections and reconstruction services for various facilities such as gas stations, oil depots, food factories, feed mills, and chemical plants, with a wealth of successful cases and industry experience.
If you happen to need a防爆电气检查报告 for such on-site requirements, feel free to DM us for detailed communication.

Services Scope of Zhongnuo Inspection's On-Site Explosion Proof Inspection:
Including industries such as oil, chemicals, coal, shipping, ports, marine engineering, gas engineering, pharmaceuticals, machinery, textiles, electricity, light industry, grain processing and storage, and wood processing, where explosive gas environments and hazardous areas with explosive or flammable dust exist. Ensure the explosion-proof safety of dangerous explosive areas to safeguard the economic development of our country and the nation.
On-Site Explosion-Proof Electrical Equipment Regular Inspection Consultancy Service - Shenzhen ZhongNuo Inspection Technology Co., Ltd.