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.
Zhenuo Inspection offers 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 Evaluation of Electrical Equipment in Dust Explosion Hazards Areas
4. Explosion-proof quality inspection and safety acceptance check for hazardous explosive areas.
5. Explosion-proof electrical and non-electrical equipment, as well as explosion-proof engineering consultation/renovation/construction/acceptance.
6. Explosion-proof technology consulting services.

The standard referenced in the "Electrical Explosion Proof Inspection Report" issued from regular inspections of explosion-proof electrical equipment includes but is 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 Projects 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-Proof Safety Code for Hazardous Areas

Standards and schedules for regular inspections of explosion-proof electrical equipment
As explosion-proof electrical equipment becomes increasingly common, it is installed and used in many hazardous explosive areas.
Many end-users believe that as long as explosion-proof electrical equipment is installed in hazardous explosive areas, everything is settled.
In many cases, so-called explosion-proof electrical appliances lack a valid explosion-proof certification, or the certification is expired or forged, with the label not matching the explosion-proof certification.
Inappropriate selection of explosion-proof types, mixed use of gas explosion-proof electrical equipment and dust explosion-proof electrical equipment, improper wiring of explosion-proof electrical equipment installation, ungrounded lines.
Holes are drilled and buttons are installed in explosion-proof casings, causing loss of explosion-proof properties. Explosion-proof electrical equipment is subjected to long-term corrosion, high temperatures, and severe vibrations.
For explosion-proof electrical equipment in use, the AQ 3009-2007 "Electrical Safety and Explosion-proof Code for Hazardous Areas" standard stipulates:
Electrical explosion-proof equipment in use should be inspected at least once every 3 years by a certified explosion-proof inspection center for its performance, installation, maintenance, etc.
Immediate corrective actions must be taken for non-compliance items, and the inspection report and corrective measures must be filed with the Safety Production Supervision and Administration Department.
Conducting explosion-proof field inspections on electrical equipment in use is not only a requirement of the safety production department, but also a testament to the enterprise's emphasis on its own life and property safety.

Shenzhen Zhongnuo Testing Technology Co., Ltd. summarizes past experience in explosion-proof electrical inspections, common non-conformities found during on-site explosion-proof electrical inspections:
Currently, China's hazardous chemical production enterprises frequently experience accidents, thus necessitating a high priority on safety production inspections. We should gradually explore the safety performance of products and equipment related to personal safety, gradually forming a significant role in safety production inspections. Now, safety inspections can provide technical support to hazardous chemical enterprises, especially the electrical explosion-proof safety inspections, which should be widely promoted, continuously guiding and serving the enterprises' safe production.
1. Inadequate design in hazardous areas
Many companies are constrained by their corporate history, and at the same time, the production materials of the enterprises are continuously changing, which makes the demarcation of hazardous areas less orderly and appears rather chaotic. 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. There is a lack of standardization in temporary electrical use, firework operations, equipment replacement, and electrical management systems.
3. Inadequate installation of explosion-proof electrical equipment
Although many companies now have explosion-proof features in their electrical facilities, issues still abound during installation, such as direct connection of main wiring, missing explosion-proof face screws, and using PVC pipes for wiring through incoming and outgoing pipelines. Additionally, the installation of switches and outlets, terminal blocks, power and lighting distribution boxes, grounding systems, and electrical wiring systems is not very reasonable, with numerous safety concerns.
4. Explosion-proof electrical wiring does not meet the 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. Non-standard grounding of explosion-proof electrical equipment
For the grounding of explosion-proof electrical equipment, the main types include internal neutral grounding, enclosure protective grounding, and static dissipative grounding. The grounding of unpowered metal enclosures is often poorly done, with frequent occurrences of grounding wires being connected to material pipelines.
6. Lack of comprehensive explosion-proof area planning for the location of the power distribution and control rooms.
Many power distribution and control rooms are located within explosion-proof zones without adequate explosion-proof measures in place.
7. Inadequate explosion-proof selection and requirements for explosion-proof electrical equipment
In electrical explosion-proof facilities, there is no distinction between environments with combustible dust and those with explosive gases; they are mixed and used together. Different hazardous areas have varying electrical explosion-proof specifications, explosion-proof markings, and types. There are also differences in levels and temperature classes. However, many companies mix and use explosion-proof electrical equipment without distinguishing these differences.
On-Site Explosion-Proof Electrical Equipment Regular Inspection Consultancy Service - Shenzhen Zhongnuo Inspection Technology Co., Ltd.