Hefei Explosion-proof Certificate Application Documents List, Shenzhen ZhongNuo Inspection, Application Cycle

Shenzhen ZhongNuo Testing Technology Co., Ltd. is based in South China and specializes in explosion-proof certification and coal mine safety certification application consulting services, offering a one-stop explosion-proof technology consulting service.
What are the requirements for obtaining an explosion-proof certificate for robot products?
More and more robotic products are being used in explosion-proof environments.
Many customers have asked, "How do we get explosion-proof certification for robotic products? What technical requirements are there? What standards should we follow? Do we need to send samples for testing since the product is so large?"
Robot products are often combinational equipment, which is also relatively large in size. To achieve explosion-proof performance,
This involves technical issues such as explosion-proof design of the entire unit, selection of electrical components, installation methods, battery selection and installation design, preparation of drawings, electrical connections, grounding, and more.
Zhenuo Inspection has been involved in the explosion-proof industry for many years, well-versed in the requirements of the GB/T 3836 series standards.
Extensive experience in evidence collection for robotic products.
We offer a one-stop explosion-proof certification service, including preliminary explosion-proof design整改, drawing assessment, component selection, installation guidance, and certification acquisition.
Products that are not convenient for shipping can also be offered on-site assessment and testing services.
Successful certified cases include patrol robots, rail-mounted robots, and positive-pressure robotic arms.
If you have a need for this, feel free to message us anytime!

How do I apply for an explosion-proof certificate? Which units issue explosion-proof certificates?
The explosion-proof certificate is a safety certification document for equipment used in explosive environments, adhering to the GB/T 3836 series standards.
The process for a company to apply for an explosion-proof certification is quite straightforward.
Please provide the electrical schematics, assembly drawings, structural drawings, product manual, and corporate standards, etc., for the product.
Provide samples for explosion-proof testing that match the provided drawings and documentation.
Once the test passes, we can issue the explosion-proof inspection report and the explosion-proof certification.
Currently, the main certification authorities for explosion-proof certificates include Nanyang CNEX, Tianjin PCEC, Shanghai NEPSI, various Coal Research Institutes, Suzhou Electric Research Institute, and others.
These institutions all hold comprehensive certification qualifications, with the certificates having equal validity.
Although the process is relatively simple, it's not easy to meet the design requirements of the GB/T 3836 series standards for the product.
If the company is new to explosion-proof product design and certification, they can turn to Shenzhen Zhongnuo Testing Technology Co., Ltd.
We offer specialized intrinsically safe circuit design and product services, including intrinsically safe design, circuit evaluation, structural design, and drawing guidance, among other consulting services.
Successful cases include various sensors, instruments, automation equipment, and robot products.
Welcome to message Shenzhen ZhongNuo Inspection Technology Co., Ltd. at any time for detailed communication!

Division of explosion-proof zones in combustible dust environments -- Shenzhen ZhongNuo Inspection & Testing Technology Co., Ltd.
In explosion-proof certification, hazardous areas are divided into explosive gas environments and combustible dust environments based on the different states of substances present in the location. According to the duration of presence of hazardous substances in the location, these hazardous areas under two different states are further divided into three zones.
For environments with combustible dust, it is for Zones 20, 21, and 22.
Zone 20 - Areas where flammable dust environments occur continuously or persistently, typically above 1000 hours per year.
Zone 21 – Areas where potentially explosive dust atmospheres may occur during normal operation, typically 10-1000h/year.
Zone 22: Under normal operation, flammable dust environments are not possible or only occur occasionally and briefly, generally below 10 hours per year.

Why choose tempered glass for explosion-proof transparent parts?
Transparent parts are a crucial material for explosion-proof electrical equipment. When selecting transparent parts, customers always ask what material should be used? Can glass be used? Can plastic be used?
Below, Shenzhen Zhongnuo Testing Technology Co., Ltd. explains to you.
GB/T3836.1 specifically stipulates temperature thermal shock tests for transparent components, the purpose of which is to verify the thermal stability of glass under rapid cooling conditions. Currently, tempered 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 counters the tensile stress generated on the surface during rapid cooling, hence, qualified tempered glass, even under the stress induced by rapid cooling, will have a compressive stress to offset its effects.
Explosion-proof Certification Application Consulting Service - Shenzhen Zhongnuo Testing Technology Co., Ltd.