Shenzhen Zhongnuo Testing Technology Co., Ltd. is based in South China and specializes in explosion-proof certification and coal safety certification application consulting services, offering one-stop explosion-proof technology consulting services.
Explosion-proof product categories with certification:
The new implementing regulations are divided into 17 product units:
Explosion-proof motors: Center height ≤ 160mm or rated power ≤ 15kW; Explosion-proof motors: 160mm < center height ≤ 280mm or 15kW < rated power ≤ 100kW; Explosion-proof motors: 280mm < center height ≤ 500mm or 100kW < rated power ≤ 500kW; Explosion-proof motors: Center height > 500mm or rated power > 500kW.
2. Explosion-proof electric pumps
3. Explosion-proof distribution equipment
4. Explosion-proof switches, control, and protection products
5. Explosion-proof starters
6. Explosion-proof transformers
7. Explosion-proof electric actuators, solenoid valves
8. Explosion-proof connector assembly
9. Explosion-proof surveillance products
10. Explosion-proof Communication and Signal Devices
11. Explosion-proof Air Conditioners, Ventilation Equipment
12. Explosion-proof electric heating products
13. Explosion-proof accessories, Ex components
14. Explosion-proof instruments and meters
15. Explosion-proof sensor
16. Safety Fencing
17. Explosion-proof instrument cabinets

What test items are included in the explosion-proof certification, and what are the requirements?
Explosion-proof is one of the most commonly used explosion-proof types in the market for explosion-proof products, adhering to the standards GB/T 3836.1 and GB/T 3836.2.
The explosion-proofing is primarily achieved through the protection of the explosion-proof housing.
The explosion-proof casing must have adequate thickness and strength; even in the event of an explosion inside the equipment, the flame will be extinguished due to the width, gap, and roughness of the casing's mating surfaces, preventing ignition of the external hazardous environment.
On the other hand, even in the event of an explosion in a hazardous location outside, the explosion-proof housing maintains its anti-explosion performance.
Overall, the housing is both explosion-proof and anti-explosion, which makes the equipment rather bulky.
ZheNuo Inspection has been dedicated to the explosion-proof field for many years, well-versed in the requirements of the GB/T 3836 series standards.
Extensive experience in the design and modification guidance for explosion-proof products, offering services including explosion-proof housing design, drafting, certification, and drawing preparation.
If you have a certification need in this area, remember to message us!

Certification standards for explosion-proof equipment used in environments with explosive gas:
GB/T 3836.1-2021 Explosive Atmospheres, Part 1: Equipment - General Requirements
GB/T 3836.2-2021 Explosive Atmospheres – Part 2: Equipment protected by intrinsic safety “d” enclosure
GB/T 3836.3-2021 Explosive Atmospheres, Part 3: Equipment protected by an increased safety "e" type
GB/T 3836.4-2021 Explosive Atmospheres, Part 4: Equipment protected by intrinsic safety "i"
GB/T 3836.5-2021 Explosion-proof Environment, Part 5: Equipment Protected by Positive Pressure Enclosure "p"
GB/T 3836.6-2017, Part 6: Equipment protected by liquid immersion type "o" for explosive atmospheres
GB/T 3836.7-2017 Explosive Atmospheres Part 7: Equipment protected by sand filling type “q”
GB/T 3836.8-2021 Explosive Atmospheres, Part 8: Equipment protected by "n" type protection
GB/T 3836.9-2021 Explosive Atmospheres Part 9: Equipment protected by cast-in “m” type enclosures

Why choose tempered glass for explosion-proof transparent parts?
Transparent parts are an important material for explosion-proof electrical equipment. When selecting transparent parts, customers always inquire about the material to be used? Is glass acceptable? Is plastic acceptable?
Below, Shenzhen Zhongnuo Testing Technology Co., Ltd. explains to you.
In GB/T3836.1, there is a specific regulation for thermal shock tests on transparent components, which aims to verify the thermal stability of glass under rapid cooling conditions. Currently, toughened glass is a material that meets these requirements and offers a high cost-performance ratio.
普及 the fact that tempered glass, after being heated and quenched, forms a uniform layer on the surface.
The compressive stress layer, which counteracts the tensile stress generated on the surface during rapid cooling. Therefore, even when subjected to the stresses caused by rapid cooling, qualified tempered glass will have a compressive stress to offset its effects.
explosion-proof certification application consulting service - Shenzhen Zhongnuo Testing Technology Co., Ltd.