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 a one-stop explosion-proof technology consulting service.
Explosive-proof certification standard for combustible dust environments:
GB/T 3836.1-2021 Explosive Atmospheres, Part 1: Equipment, General Requirements
GB/T 3836.4-2021 Explosive Atmospheres Part 4: Equipment protected by intrinsic safety "i"
GB/T 3836.5-2021 Explosive Atmospheres, Part 5: Equipment protected by positive pressure enclosure "p"
GB/T 3836.9-2021 Explosive Atmospheres Part 9: Equipment protected by casting-in type "m"
GB/T 3836.31-2021 Explosive Atmospheres Part 31: Equipment protected by dust ignition-proof enclosures “t”

What is the difference between obtaining the ATEX certification and the Coal Mine Safety certification for products?
intrinsic safety certification, also known as intrinsic safety explosion-proof certification.
In the explosion-proof industry, there are various explosion-proof protection types, including隔爆型、本安型、增安型、正压型、浇封型, and so on.
intrinsic safety is just one type of explosion-proof design; equipment utilizing this type of explosion-proof design is used in explosive areas.
Due to limitations on its working voltage, current, capacitance, inductance, etc.
Even if sparks occur within the circuit, they are insufficient to ignite the surrounding explosive environment, ensuring intrinsic safety.
The intrinsic safety certification is widely used for low-power, low-energy instruments, handheld terminal products, and similar devices.
Coal Mine Safety Certification is a mandatory safety certification for equipment used underground in coal mines.
Due to the presence of explosive substances like methane in underground coal mines, electrical equipment used in such mines must be equipped with protective measures to ensure explosion-proof performance.
You can choose suitable explosion-proof protection types, such as intrinsic safety, flameproof, and encapsulation, based on product structure, electrical parameters, installation method, and usage area.
It's worth noting that electrical equipment applying for the Coal Mine Safety Certification must not only have explosion-proof capabilities but also meet performance tests for the special underground environment of coal mines.
ZheNuo Inspection has long been focused on explosion-proof certification and coal safety certification, well-versed in certification standards.
Familiarity with product explosion-proof design, modification, testing, certification, and factory audit processes and requirements can help companies quickly obtain explosion-proof and coal safety certifications.

What is the difference between the corrosion protection grade, protection grade, and explosion-proof certification grade?
Many corporate clients are often baffled by the required corrosion resistance, protection class, and explosion-proof certification levels for their products.
Due to the mere one-character difference in their names, and both referring to a certain grade of the product, they are similar yet distinct. So, what are the differences between them?
Corrosion protection involves measures taken to safeguard metals prone to rust, thereby extending their service life. Common methods include physical, chemical, and electrochemical corrosion protection. It is typically categorized into five levels: indoor F1, F2, and outdoor WF, WF1, and WF2.
Protection rating, commonly known as IP rating, refers to the dust and water resistance level of the equipment, typically consisting of "IP" followed by two digits.
The explosion-proof grade generally refers to the certification level of the equipment's explosion-proof rating. Each electrical equipment applying for an explosion-proof certification will have a corresponding explosion-proof marking, including the type and grade of explosion-proof. The explosion-proof grade indicates the product's applicable explosion-proof area, gas/dust groups, temperature groups, and equipment protection level.
Clearly, these are different concepts from different fields. For more information on this topic, feel free to message us anytime!

What are the requirements for obtaining an explosion-proof certificate for robot products?
More and more robot products are now being applied in explosion-proof areas. Many customers have asked, how do robot products obtain explosion-proof certification?
What technical requirements? By what standards? With such a large product, do we need to send samples for testing?
Robot products are often combinational equipment, and the equipment is also large in size. To achieve explosion-proof performance,
This involves whole-machine explosion-proof design, electrical component selection, and installation methods.
Battery selection and installation design, preparation of drawings, electrical connections, grounding, and other technical issues.
ZheNuo Inspection has been 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 within the robotic products sector.
We offer a one-stop explosion-proof certification service, including initial explosion-proof design整改, drawing evaluation, component selection, installation guidance, and certification acquisition.
Products that are not convenient for shipping can also be offered on-site evaluation and testing services.
Successful certified cases include patrol robots, track-mounted robots, and positive-pressure robotic arms.
If you have a need for this, feel free to message us anytime!
Explosion-proof Certification Application Consultancy Service - Shenzhen ZhongNuo Testing Technology Co., Ltd.