Shenzhen Zhongnuo Testing Technology Co., Ltd. is based in South China, offering on-site explosion-proof construction, safety inspections, renovations, project acceptance, and explosion-proof installation consulting services. We are well-versed in explosion-proof construction standards, with experienced construction teams and a wealth of practical experience. We have served major corporations such as PetroChina, LG, Hanlan Environment, BOE Technology Group, and Sinovac Biotech, receiving consistent praise and trust from our clients!
Shenzhen ZhongNuo Testing Technology Co., Ltd. offers explosion-proof construction service in the field of:
Including petrochemicals, metal smelting, fine chemicals, petrochemical ground facilities (gas stations, refueling stations, petrochemical storage and transportation), new energy, special equipment, nuclear power, tunnels, grain processing, wood processing, metal component processing, environmental protection engineering, and many other industries and fields, there are hazardous areas with explosive gas environments and environments with explosive or flammable dust. Ensuring the explosion-proof safety of dangerous explosive areas is crucial for safeguarding the economic development of our country and its people.

Shenzhen ZhongNuo Testing Technology Co., Ltd. offers a range of explosion-proof engineering services for hazardous explosive 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 renovation
5. Explosion relief walls, doors, and windows installation
6. Dust Removal Equipment Installation and Retrofitting Construction

Equipment grounding in explosive environments should comply with the following regulations (shared by Shenzhen ZhongNuo Testing Technology Co., Ltd.)
In accordance with the relevant provisions of the current standard "Code for Design of Grounding of Electrical Installations," GB/T50065, the following parts that do not require grounding should still be grounded in explosive environments:
1) Non-electrically conductive surfaces: metal enclosures of equipment with alternating current rated voltage below 1000V and direct current rated voltage below 1500V, which are normally not energized.
2) In dry environments, equipment with alternating voltage ratings of 127V or less and direct voltage ratings of 110V or less typically have metal enclosures that are not energized.
3) Equipment installed on a grounded metal structure.
(2) In explosive hazardous areas, the exposed conductive parts of equipment should be reliably grounded. All equipment within explosive zones 1, 20, and 21, as well as other equipment within explosive zones 2 and 22 except for lighting fixtures, should use dedicated grounding cables. If these grounding cables are installed in the same protective conduit with phase wires, they must have insulation equal to that of the phase wires. Lighting fixtures within explosive zones 2 and 22 can use a metal piping system with reliable electrical connections as a grounding cable, but not piping for conveying substances.
(3) In different directions of the slope in the explosive hazardous area, the grounding main should connect to the grounding body at no fewer than two points.

As the global energy and chemical industries develop, construction in explosive hazardous environments is becoming more widespread, making the prevention and inspection of explosive environments increasingly important.
Especially in flammable dust environments, such as plastic factories, feed/food/grain processing plants, metal polishing workshops, papermaking/forestry wood powder/fiber dust factories, and so on, the number of projects involving explosion-proof installation, design, and renovation is also on the rise.
Whether it's large-area explosion-proof or local explosion-proof, if there are hidden dangers in product quality or installation/renovation quality,
Our personal and property safety is at great risk, so we must maintain quality control at every stage, ensuring the reliability and safety of explosion-proof installations and renovations.
Shenzhen ZhongNuo Testing Technology Co., Ltd. offers explosion-proof construction and modification consulting services, boasting a wealth of qualifications and case studies—definitely worth it!
Explosion-proof electrical retrofitting in hazardous areas and on-site explosion-proof construction consulting services - Shenzhen ZhongNuo Testing Technology Co., Ltd.