Shenzhen Zhongnuo Inspection & Technology Co., Ltd. is based in South China and offers explosion-proof construction on-site services, safety inspections, renovations, project acceptance, and explosion-proof installation consulting. We are well-versed in explosion-proof construction standards and have a team of experienced contractors. We have served major enterprises such as PetroChina, LG, Huanlan Environment, BOE, and Sinovac Biotech, receiving consistent praise and trust from our clients!
Shenzhen Zhongnuo Testing Technology Co., Ltd. offers explosion-proof engineering construction services for hazardous explosive areas.
1. Explosion-proof field inspection and consultation
2. Explosion-proof construction and renovation on-site
3. Explosion-proof construction acceptance
4. Explosion-proof electrical installation, maintenance, and renovation
5. Explosion relief, explosion-proof walls, doors, and windows installation
6. Dust Removal Equipment Installation and Retrofitting Construction

Basic Specifications for Explosion-Proof Electrical Construction (Shared by Shenzhen Zhongnuo Inspection Technology Co., Ltd.)
Explosion-proof electrical construction differs from standard electrical construction, as it involves increased explosion-proof requirements due to the environment it is in. In accordance with industry standards, an environment where air mixes with gases, vapors, mist, or dust in atmospheric conditions, and upon ignition, the fire spreads to all unburned mixtures, is referred to as an explosive environment. An area where a large or expected quantity of explosive gas environments or combustible dust environments necessitates special precautions for the structure, installation, and use of electrical equipment is termed a hazardous area. Explosion-proof electrical construction refers to a task that meets explosion-proof electrical, environmental, and personnel requirements, conducted in explosive environments and hazardous areas, and is highly critical.

Explosive circuit protection should comply with the following regulations (shared by Shenzhen ZhongNuo Testing Technology Co., Ltd.)
In the single-phase network within Area 1, both phase wires and neutral lines should be equipped with short-circuit protection, and appropriate switches should be used to simultaneously disconnect both phase wires and neutral lines.
(2) For 3kV-10kV cable lines, it is advisable to install zero-sequence current protection, with the protective devices in Zones 1 and 21 to operate by tripping.

Basic Explosion-Proof Design Standards for Hazardous Areas (Shared by Shenzhen ZhongNuo Testing Technology Co., Ltd.)
1. First, conduct the overall explosion protection design
2. Directed release of explosive energy. Around the explosion source, utilize both explosion-proof and deflagration mitigation techniques. Set explosion-proof walls and explosion-proof windows in densely populated directions, office areas, and directions of critical equipment; install deflagration mitigation walls and deflagration mitigation windows in directions with little human access and without critical equipment.
3. Establish safe distances. Minimize the placement of office areas, residential zones, and critical equipment areas within distances less than the safe limit, unless necessary; if set up, implement necessary explosion-proof measures.
4. Conversion of non-blast-resistant buildings to blast-resistant structures. Within the range of less than the safe distance, blast resistance assessment of the buildings should be conducted, and reinforcement for buildings not meeting blast resistance requirements should be carried out: to prevent building collapse; to prevent the cracking of brittle materials such as bricks, concrete, glass, etc., and the resulting spalling.
5. Place explosion-proof shelters in hazardous blast areas.
Explosion-proof electrical retrofits and on-site explosion-proof construction consulting services for hazardous areas — Shenzhen Zhongnuo Inspection Technology Co., Ltd.