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 non-compliant items.
After the explosion-proof project is completed, it requires a third-party institution with explosion-proof inspection qualifications (Shenzhen Zhongnu Inspection Technology Co., Ltd.) to conduct the project acceptance. Only after passing the acceptance can the project be put into use.
Safety explosion-proof project acceptance content
1. The label of explosion-proof electrical equipment must include the explosion-proof qualification number issued by the inspection unit.
2. The types, levels, and groups of explosion-proof electrical equipment should comply with the design.
3. The housing of explosion-proof electrical equipment should be free from cracks and damage; the paint should be intact. The cover of the junction box should be securely fastened, and the fixing bolts and anti-loosening devices should be in place.
4. The ventilation and exhaust systems of positive-pressure electrical equipment should be unobstructed, properly connected, and the installation locations of the inlets and outlets meet the requirements.
5. Excess entry ports of electrical equipment should be sealed as per regulations.
6. The installation of sealed devices in electrical circuits should comply with regulations.
7. Wiring engineering for inherently safe electrical equipment shall comply with the design; the lines should be marked with a sky blue sign.
8. Electrical installations must have proper grounding or neutral connection and antistatic wiring, in compliance with design specifications, ensuring secure and reliable grounding.

Shenzhen Zhongnuo Testing Technology Co., Ltd. summarizes the experience from previous explosion-proof electrical inspections. The main items and contents of the AQ3009 explosion-proof electrical inspection include:
In accordance with Section 7 of AQ3009-2007 "Electrical Explosion Protection Safety Regulations for Hazardous Areas" (implemented as of January 1, 2008): Electrical equipment used in hazardous areas shall undergo initial and periodic inspections. Inspections must be conducted by a qualified explosion-proof inspection agency, with intervals generally not exceeding 3 years. Enterprises should take corrective actions promptly based on the inspection results and file the Report and the status of corrections with the安全生产监督管理 department.
The "AQ 3009-2007 Specification for Electrical Safety and Explosion-proof in Hazardous Areas" serves as a Chinese industry standard. The preface of the standard 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 they must be strictly enforced!

Does explosion-proof electrical equipment require an explosion-proof acceptance test after installation?
Many corporate clients are puzzled: Does the installation of electrical equipment with an effective and genuine explosion-proof certification mean it can be used normally?
Is using explosion-proof equipment equivalent to overall 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 just about the product itself but also its installation method, maintenance, and care. In reality, explosions often occur due to improper use by the users, leading to the failure of explosion-proof electrical equipment and causing explosion accidents, which is a matter of great concern.
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 entire project's explosion-proof safety performance. The explosion-proof acceptance standards are based on mandatory standards such as AQ 3009, GB/T3836.15, GB/T3836.16, GB 50257, etc.
After the explosion-proof equipment installation and acceptance, it's not a one-time solution. To ensure the equipment operates effectively and can be safely used in hazardous areas over the long term, continuous supervision and regular inspections of the equipment in use are also necessary.
Continuous supervision should be conducted by the company's personnel, with corresponding inspection records kept, and any abnormal phenomena handled promptly.
Regular inspections should be entrusted to qualified inspection agencies, with intervals generally not exceeding 3 years. Enterprises should promptly implement explosion-proof rectification measures for items that do not meet inspection requirements and file the third-party qualification agency's Report and rectification status with the安全生产监督管理部门.

Shenzhen Zhongnuo Testing Technology Co., Ltd. summarizes past experiences in explosion-proof electrical inspection, common non-compliance items found during on-site explosion-proof electrical inspections:
Currently, hazardous chemical production enterprises in our country frequently experience accidents, thus demanding great attention to safety production inspections. We should gradually explore the safety performance of products and equipment involving personal safety, gradually forming an important role in safety production inspections. Now, safety inspections can provide technical support to hazardous chemical companies, with particular emphasis on electrical explosion-proof safety inspections, which should be widely promoted, continuously guiding and serving the companies' safety production.
1. Improper design in hazardous areas
Many businesses are constrained by their company history, and at the same time, the production materials are continuously changing, leading to an irregular division of hazardous areas and a rather chaotic appearance. The layout of equipment and facilities does not meet the explosion-proof requirements.
2. Understanding of explosion-proof knowledge is relatively weak.
In many hazardous chemical enterprises, there is a lack of distinction between electrical explosion-proof safety inspections and fire protection electrical and building electrical inspections. In terms of temporary power use, hot work operations, equipment replacement, and electrical management systems, there is a significant lack of standardization.
3. Inadequate installation of explosion-proof electrical equipment
Although many companies now have explosion-proof features in their electrical equipment, there are still many issues with installation, such as direct wiring connections on main lines, missing explosion-proof face screws, and using PVC pipes for wiring in incoming and outgoing pipelines. Additionally, the installation of switches and outlets, wiring terminals, power and lighting distribution boxes, grounding systems, and electrical wiring systems is not very reasonable, with many safety concerns.
4. Explosion-proof electrical wiring routing does not meet requirements
In explosive environments, many companies currently do not place enough emphasis on explosion-proof electrical wiring, fail to correctly understand the technical parameters of hazardous materials in dangerous areas, and often install wiring arbitrarily.
5. Improper grounding of explosion-proof electrical equipment
For the grounding of explosion-proof electrical equipment, there are mainly internal neutral grounding, housing protective grounding, and antistatic grounding. The grounding of unpowered metal housing is often poorly done, with frequent occurrences of grounding wires being connected to material pipelines.
6. Lacking overall planning for explosion-proof zones in the selection of power distribution rooms and control rooms.
Many electrical control rooms are located within explosion-proof zones without adequate explosion-proof measures in place.
7. Inadequate selection and requirements for explosion-proof electrical equipment
In electrical explosion-proof equipment, there is no distinction between environments with combustible dust and those with explosive gases; they are mixed and used. In different hazardous areas, there are various electrical explosion-proof regulations, markings, and types, along with differing levels and temperature classes. Many companies, however, mix and match explosion-proof electrical equipment without distinguishing these differences.
On-Site Explosion-Proof Electrical Equipment Regular Inspection Consulting Service - Shenzhen Zhongnuo Inspection Technology Co., Ltd.