Shenzhen Zhongnuo Inspection & Technology Co., Ltd. offers on-site explosion-proof electrical inspection, explosion-proof project acceptance services, and consulting. We also provide explosion-proof rectification and construction services for items that fail inspection.
The standard(s) referenced in the "Electrical Explosion Protection 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 Coal Mines)"
AQ3009-2007 Electrical Explosion Protection Safety Regulations for Hazardous Areas

Major contents of regular inspection 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 they must pass the relevant explosion-proof standard inspections before implementation. 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 carelessness can potentially lead to losses. For instance, if the ventilation and exhaust system is not properly installed and is not sufficiently unobstructed, and if the electrical equipment's casing has the potential to explode during electrical operations, it is crucial to strive for perfection and ensure proper installation according to relevant standards.
3. Line Inspection
Electrical equipment is often composed of a large number of interconnected wires, which can be particularly complex. If not properly connected, or if there are incorrect connections, or if the insulation of the wires peels off, it may lead to short circuits or overloads, resulting in arcs or sparks. Therefore, it is crucial to strengthen the inspection of circuit connections, especially the sealing of wires, to ensure that the connections meet the requirements.
4. Grounding Inspection
Electrical equipment generates static electricity during operation. If there's too much static, sparks may occur upon discharge. Therefore, proper grounding protection is essential to timely 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 safe and secure.

Regulations and laws regarding regular inspections of explosion-proof electrical equipment:
Flameproof equipment used in explosive hazardous areas throughout its entire lifecycle, including production, installation, operation, inspection, maintenance, and withdrawal from the market,
Regular inspections ensure the proper usage and effective explosion-proof safety performance. Relevant laws and regulations in our country also stipulate corresponding provisions.
There is a clear stipulation in the standard AQ3009-2007 "Electrical Safety and Explosion-Proof Regulations for Hazardous Areas":
Regular inspections should be entrusted to safety production inspection agencies with explosion-proof qualifications, with intervals generally not exceeding 3 years.
The company should promptly implement corrective measures based on the inspection results and file the inspection report and the rectification status with the department of安全生产 supervision and management.
The preface of AQ3009-2007 "Electrical Safety and Explosion-Proof Regulations for Hazardous Areas" also explicitly states that Chapters 4, 5, 6, and 7 are mandatory and must be strictly enforced. Therefore, such safety regulations are part of the legal and regulatory framework and must be strictly enforced as mandatory!

Dust Explosion Hazardous Area Safety Inspection Specification
GB15577-2018 Dust Explosion Prevention Safety Code
GB 17440-2008 Dust Explosion Prevention Safety Standard for Grain Processing Enterprises
GB17918-2009 Dust Explosion Prevention Safety Standard for Bulk Grain Handling Systems at Ports
AQ4229-2013 Dust Explosion Prevention Safety Standard for Grain Vertical Silos
AQ4230-2013 Grain Flat Storage Dust Explosion Prevention Safety Standard
AQ4232-2013 Specification for Dust Explosion Prevention in Plastic Production Systems
GB18245-2000 Process System Dust Explosion Prevention Safety Standard
GB19081-2008 Feed Processing System Dust Explosion Prevention Safety Standard
GB16543-2008 Coal Injection System Dust Explosion Prevention Safety Specification
GB17269-2003 Aluminum Processing System Dust Explosion Prevention Safety Specification
GB/T 16505-1995 Guide for Dust Explosion Relief
GB/T 17919-2009 Guidelines for Explosion-proof Dust Collectors in Hazardous Dust Explosion Areas
GB 12158-2006 General Guidelines for Preventing Static Electricity Accidents
AQ3009-2007 Electrical Explosion-Proof Safety Code for Hazardous Areas
GB 50058-2014 Code for Design of Power Installations for Explosive and Fire Hazardous Environments
GB50257-2014 Code for Electrical Installation Engineering - Electrical Construction and Acceptance Specifications for Explosion and Fire Hazardous Environments
On-Site Explosion Proof Electrical Equipment Regular Inspection Consulting Service - Shenzhen Zhongnuo Inspection Technology Co., Ltd.