Shenzhen Zhongnuo Inspection & Technology Co., Ltd. offers on-site explosion-proof electrical inspection, explosion-proof project acceptance services, and consulting services. We also provide explosion-proof rectification and construction services for items not meeting inspection standards.
The standards referenced in the "Electrical Explosion Proof Inspection Report" issued from regular inspections of explosion-proof electrical equipment include, but are 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 Installation in Explosive and Flammable Gas and Dust Environments
GB/T3836.15-2017 "Electrical Equipment for Explosive Gas Atmospheres - Part 15: Electrical Installations in Hazardous Areas (Excluding Mines)"
AQ3009-2007 Electrical Explosion Protection Safety Standard for Hazardous Areas

The AQ3009 "Electrical Explosion Protection Safety Regulations for Hazardous Areas" stipulates that periodic inspections of hazardous areas should be entrusted to safety production inspection agencies with explosion-proof qualifications, with intervals generally not exceeding 3 years. We offer on-site explosion-proof inspection consulting services covering electrical explosion protection safety, anti-static, dust explosion hazard areas, flammable gas, and other safety facilities and equipment inspections. We are responsible for explosion-proof equipment design and selection, maintenance and repair of in-service explosion-proof equipment, on-site explosion-proof safety inspections in explosive gas environments and flammable dust environments, and ensuring the safe production of hazardous chemical substances and in areas with explosion hazards.

ZhongNuo Inspection offers a range of explosion-proof site safety inspection services:
1. Explosion-proof safety inspections for electrical equipment in hazardous areas
2. Explosive Dust Explosion Proof Testing
3. On-site Assessment of Electrical Equipment in Dust Explosion Areas
4. Explosion-proof quality inspection and safety acceptance inspection for hazardous explosive areas.
5. Explosion-proof electrical and non-electrical equipment, as well as consulting, renovation, construction, and acceptance of explosion-proof projects.
6. Various explosion-proof technology consulting services.

Application Agency for Explosion-Proof Electrical Construction Completion Inspection 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. Additionally, apart from regular checks by the company itself, a facility with explosion-proof inspection qualifications must perform periodic checks every three years.
What are the main items inspected during the completion acceptance here?
1. Inspect if the explosion-proof electrical equipment has a label, an Ex mark, and clear identification of the type, class, and group of the explosion-proof equipment. Does the label indicate the explosion-proof certificate number issued by the inspection unit?
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, the junction box cover is securely fastened, and 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 required specifications.
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 inlets and outlets should meet the requirements.
6. Are the extra entry ports of explosion-proof electrical equipment properly sealed in accordance with regulations?
7. Installation of sealed or insulated devices in electrical circuits should comply with regulations.
8. Wiring engineering for intrinsic safety explosion-proof electrical equipment shall comply with design requirements; the route and elevation of the lines should be marked with a sky blue sign.
9. The grounding or neutral bonding of explosion-proof electrical equipment and static electricity grounding should comply with design requirements, ensuring a firm and reliable connection.
10. At the time of completion and acceptance, submit the relevant documents, materials, manufacturer's product user manuals, test records, qualification certificates, and installation drawings, as well as other technical documents.
11. At the time of acceptance, the following measurement records should also be submitted:
Record of measurement for the single-side air gap of the stator and rotor in explosion-proof motors with increased safety design.
(2) Adjustments records of pressure relief devices for explosion-proof electrical equipment, such as wind pressure and air pressure relays, as well as high-temperature records of the equipment's housing during trial operation and test records of static discharge grounding resistance values.
12. Explosion-proof electrical equipment operation records
(1) The shell temperature of explosion-proof electrical equipment, including intrinsically safe and non-sparking explosion-proof electrical equipment, should not exceed the specified value.
(2) After the internal wiring of the junction box is securely fastened, the electrical clearances and creepage distances between the 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 wind pressure and air pressure.
(4) The protective devices and interlock devices of explosion-proof electrical equipment should operate correctly and reliably.
On-site Explosion Proof Electrical Equipment Regular Inspection Consultancy Service - Shenzhen Zhongnuo Testing Technology Co., Ltd.