Shenzhen ZhongNuo Inspection & Technology Co., Ltd. is based in South China and offers a range of explosion-proof technical consulting services, including on-site explosion-proof construction, safety inspections, renovations, project acceptance, and explosion-proof installation. We are well-versed in explosion-proof construction standards and boast a team with extensive experience. Our services have been utilized by major companies such as PetroChina, LG, Huanlan Environment, BOE Technology Group, and Sinovac Biotech, and we have consistently received positive feedback and trust from our clients!
Protection of explosive circuitry shall comply with the following regulations (shared by Shenzhen ZhongNuo Testing Technology Co., Ltd.)
In the single-phase network within Area 1, both phase and neutral lines should be equipped with short-circuit protection, and appropriate switches should be used to simultaneously disconnect both the phase and neutral lines.
(2) For 3kV-10kV cable lines, it is advisable to install zero-sequence current protection, with protective devices in Zone 1 and Zone 21 designed to trip the circuit breaker.

Shenzhen ZhongNuo Inspection Technology Co., Ltd. offers a range of explosion-proof engineering construction services for hazardous areas.
1. Explosion-proof site inspection and consultation
2. Explosion-proof engineering site construction and renovation
3. Explosion-proof Construction Acceptance
4. Explosion-proof electrical installation, maintenance, and modification
5. Explosion relief walls, doors, and windows installation
6. Dust Removal Equipment Installation and Renovation Construction

In recent years, as society continues to develop and safety accidents become increasingly prominent, people's awareness of safety production is also on the rise. The governance of hazards in dangerous environments is urgent.
In numerous industrial sectors in our country, such as oil, chemicals, ports, coal, and others, leaks or spills of various flammable and explosive gases, liquids, dust, and fibers may occur during production, processing, transportation, and storage processes. When these substances mix with air, they can form explosive mixtures. Once the concentration of the mixture reaches the explosive range, a spark can trigger explosions and severe fires, potentially leading to massive accidents through chain reactions. Therefore, equipment used in such hazardous environments must be certified as explosion-proof by authorized institutions. The use of all explosion-proof equipment in these environments must be installed and adjusted by experienced engineering companies, strictly adhering to the construction and acceptance standards for explosion-proof projects, before being put into actual production use. This ensures the maximum safety requirements for all stages of the production process.

Standard for Explosion-proof Construction Acceptance - Shenzhen ZhongNuo Testing Technology Co., Ltd.
G50058 "Code for Design of Electrical Installations in Explosive Hazardous Environments"
GBJ54-83 Specification for Design of Low-Voltage Distribution Systems and Equipment
G50016 "Code for Fire Prevention in Architectural Design"
AQ3009 Electrical Explosion-Proof Safety Regulations for Hazardous Areas
GB/T3836.1 "Explosive Atmospheres - Part 1: Equipment - General Requirements"
GB/T3836.15 "Design, Selection, and Installation of Electrical Equipment for Explosive Atmospheres"
GB50257 Specification for Construction and Acceptance of Electrical Installation in Explosive and Flammable Gas Environment
14J938 Explosion-Proof and Explosion Relief Windows, Doors, Roof, and Wall Construction
Explosion-proof electrical modifications and on-site explosion-proof construction consulting services for hazardous areas — Shenzhen Zhongnuo Testing Technology Co., Ltd.