Shenzhen Zhongnuo Testing 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 that fail inspection.
Main contents of regular inspections for explosion-proof electrical equipment
1. Model Inspection
In strict accordance with relevant laws, the explosion-proof markings on explosion-proof electrical equipment must be standardized, and the equipment must pass the corresponding explosion-proof standard inspections and be deemed qualified before implementation. The explosion-proof type, level, and temperature class of electrical equipment should be designed according to the specific working environment.
2. Installation Inspection
During electrical equipment installation, any oversight can lead to potential losses. For instance, if the ventilation and exhaust system is not properly installed and not functioning smoothly, or if the electrical equipment casing has the potential to explode during operation, it is crucial to install with utmost precision and adhere to relevant standards.
3. Line Inspection
Electrical equipment is often composed of a large number of interconnected wires, which can be particularly complex. If the connections are not secure, or if there are incorrect connections, or if the insulation of the wires has come off, it can lead to short circuits or overloads, potentially causing arcs or sparks. Therefore, it is crucial to strengthen the inspection of circuit connections, especially the sealed integrity of the wires, to ensure the connections meet requirements.
4. Grounding Inspection
Electrical equipment generates static electricity during operation. If there's an excessive amount of static, sparks may occur upon discharge. Therefore, proper grounding protection must be implemented to promptly dissipate static electricity and prevent explosions. Common grounding methods include working grounding, static grounding, and lightning protection grounding, etc. Engineers must select the appropriate grounding method based on the specific working environment and ensure that the grounding is secure and stable.

Required Documents for On-Site Explosion-Proof Inspection Application
1. Area of explosion-proof site
2. Explosion Hazard Area Division Map
3. Names of explosive hazardous substances within the corresponding danger zones and their Material Safety Data Sheets (MSDS)
4. List of explosion-proof electrical products, including installation area 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 Documentation for Intrinsically Safe Systems
8. Installation Quality Relevant Information

How often should explosion-proof electrical equipment be regularly inspected?
With the widespread use of explosion-proof electrical equipment, many explosive hazardous areas have adopted such equipment. Many end-users believe that installing explosion-proof electrical equipment in hazardous areas is sufficient. However, in many cases, the so-called explosion-proof equipment lacks valid certification, has expired, or is counterfeit; the label does not match the certification; the type selection does not comply; gas and dust explosion-proof equipment are mixed; holes are drilled in explosion-proof enclosures; explosion-proof equipment is exposed to long-term corrosion, high temperatures, and intense vibrations. Regarding explosion-proof electrical equipment in use, the AQ 3009-2007 "Electrical Safety and Explosion-proof Regulations for Hazardous Areas" standard stipulates: explosion-proof electrical equipment in use should be inspected by a qualified explosion-proof inspection center at least once every 3 years for performance, installation, and maintenance. Immediate corrective actions must be taken for any non-compliance, and the inspection report and corrective measures must be filed with the safety production supervision and management department. Conducting on-site explosion-proof inspections of electrical equipment in use is not only a requirement of the safety production department but also a reflection of a company's commitment to its own life and property safety.
ZhongNuo Inspection has provided on-site explosion-proof inspections and transformation services for various facilities such as gas stations, oil depots, food factories, feed mills, and chemical plants, boasting a wealth of successful cases and industry experience.
If you happen to need a report on explosion-proof electrical inspections for this kind of on-site work, feel free to message us for further discussion.

Does explosion-proof electrical equipment require an explosion-proof acceptance after installation?
Many corporate customers are puzzled: Does the installation of electrical equipment with a valid and authentic explosion-proof certification mean it can be used normally?
Is using explosion-proof equipment equivalent to the entire system being explosion-proof?
We understand that every product has its lifecycle, from production, market launch, end-user use, wear and tear, to obsolescence. As special equipment in a specialized industry, the lifecycle of explosion-proof equipment is not only about the product itself but also its installation methods, maintenance procedures, and more. In reality, there are often cases where improper use by the user leads to the failure of explosion-proof electrical equipment, causing explosion accidents. This is something that deserves our vigilance.
Therefore, the installation and acceptance 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 overall explosion-proof safety performance of the project. The explosion-proof acceptance standards are based on the mandatory standards 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 used safely in hazardous areas for a long period, continuous supervision and regular inspections of the equipment in use are also necessary.
Continuous supervision should be conducted by the company's staff, with corresponding inspection records kept and any anomalies addressed promptly.
Regular inspections should be conducted by qualified inspection agencies, with intervals generally not exceeding 3 years. Enterprises should promptly implement explosion-proof rectification measures for any items that do not meet inspection standards and submit the third-party qualification agency's Report and rectification status to the安全生产 supervision and management department for record.
On-Site Explosion-Proof Electrical Equipment Regular Inspection Consulting Service - Shenzhen Zhongnuo Testing Technology Co., Ltd.