Shenzhen Zhongnuo Testing 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 non-compliant items.
We understand that since places involving explosive gases and dust need regular explosion-proof electrical inspections, what specific content is checked?
Electrical Explosion Proof Safety Inspections in Hazardous Areas
1. Model Inspection
In strict accordance with relevant laws, the explosion-proof marking of explosion-proof electrical equipment must be standardized, and it can only be implemented after passing the corresponding explosion-proof standard inspection and obtaining a qualification. It is necessary to design the appropriate explosion-proof type, level, and temperature class for electrical equipment based on the specific working environment.
2. Installation Inspection
During electrical equipment installation, any oversight can potentially lead to losses. For instance, if the ventilation and exhaust system is not properly installed and is not sufficiently unobstructed, or if the electrical equipment's casing poses an explosion risk during operation, it is crucial to strive for perfection and ensure that the installation adheres to relevant standards.
3. Wire inspection
Electrical equipment is often composed of a large number of interconnected wires, which can be particularly complex. If not securely connected, or if there are incorrect connections, or due to the insulation layer of the wires coming off, it may lead to short circuits or overloads, causing arcs or sparks. Therefore, it is crucial to strengthen inspections of the circuit, especially the wire密封, to ensure the connections meet requirements.
4. Grounding Inspection
Electrical equipment generates static electricity during operation. If there is too much static, sparks may occur during discharge. Therefore, it is crucial to ensure proper grounding protection. This allows for the timely discharge of static electricity, preventing explosions. Common grounding methods include working grounding, static grounding, and lightning protection grounding. Engineers must select the appropriate grounding method based on the specific working environment and ensure it is both safe and secure.
Chemical companies must regularly maintain and inspect explosion-proof electrical and anti-static facilities in hazardous areas, ensuring they are always operating in a normal state. For hazardous locations, electrical explosion-proof safety inspections should evolve with scientific development, keep up with the times, enhance the discovery and invention of new inspection methods and means, continuously apply new knowledge and technology, and management approaches to prevent latent dangers and eliminate unsafe factors.

Standards and cycles for regular inspections of explosion-proof electrical equipment
With the increasing popularity of explosion-proof electrical equipment, many explosive hazardous areas have installed and utilized explosion-proof electrical appliances.
Many end-users believe that installing explosion-proof electrical equipment in hazardous explosive areas is all that's needed.
In many cases, so-called explosion-proof electrical equipment lacks the necessary explosion-proof certification, or the certification has expired or is fraudulent. The label does not match the explosion-proof certification.
Inadequate selection of explosion-proof types, misuse of gas explosion-proof electrical equipment with dust explosion-proof electrical equipment, improper wiring for explosion-proof electrical equipment installation, lack of grounding for the circuit.
Holes in explosion-proof casings and button installations can cause explosion-proof failure. Long-term exposure to corrosion, high temperatures, and intense vibrations can also lead to failure in explosion-proof electrical equipment.
For explosion-proof electrical equipment in use, the AQ 3009-2007 "Electrical Safety and Explosion Protection Regulations for Hazardous Areas" standard stipulates:
Electrical explosion-proof equipment in use should be inspected by a center with explosion-proof expertise at least once every 3 years, assessing its performance, installation, maintenance, etc.
Immediate corrective actions must be taken for non-compliance items, and the inspection report and rectification details must be filed with the安全生产监督管理部门.
Conducting explosion-proof site inspections on electrical equipment in use is not only a requirement of the safety production department, but also a reflection of the company's emphasis on its own life and property safety.

Materials Required for On-Site Explosion-Proof Inspection Application
1. Area of the explosion-proof site
2. Hazardous Explosion-Proof Area Division Map
3. Names of explosive hazardous substances within the corresponding danger zones, along with their Material Safety Data Sheets (MSDS)
4.防爆电气产品清单， including installation area and tag number information
5. Copies of explosion-proof electrical products' explosion-proof certification
6. Instructional document on special usage conditions for explosion-proof electrical equipment
7. Descriptive Technical Documentation of Intrinsically Safe Systems
8. Documentation regarding installation quality

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 checked regularly? How often should a check report be issued? What standards are explicitly mentioned, and how are they defined? 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 will simply answer these questions for you.
Due to the industry's特殊性, facilities with explosive hazards must purchase and install equipment with valid explosion-proof certification, and ensure proper installation and maintenance. In addition, regular explosion-proof safety checks and routine inspections and maintenance of these electrical devices are required to confirm their continued explosion-proof performance. The AQ3009-2007 "Electrical Explosion-Proof Safety Regulations for Hazardous Areas" also stipulates that regular inspections should be conducted 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 inspection and modification services for various gas stations, fuel stations, oil depots, food factories, feed mills, chemical plants, etc., boasting a wealth of successful cases and industry experience.
If you happen to need a防爆电气检查报告 for this type of on-site work, feel free to DM us for a detailed discussion.
On-site Explosion-proof Electrical Equipment Regular Inspection Consultancy Service - Shenzhen ZhongNuo Inspection Technology Co., Ltd.