Shenzhen Zhongnuo Testing Technology Co., Ltd. specializes in consulting services for explosion-proof certification and coal safety certification.
Basic Process and Agencies for Coal Safety Certification
Coal safety certification is a mandatory safety certification for equipment and products used in coal mine underground, conducted through a "product testing + factory audit" approach. It involves not only testing the application products but also conducting on-site audits and annual supervisory assessments of the production factories for the application products, which is commonly referred to as factory inspections.
Product testing requires compliance with coal safety standards, such as electrical products needing to meet explosion-proof requirements in coal mine gas environments, as well as product performance standards.
Factory audits primarily focus on the ISO9001 production quality system, with additional requirements from the Mine Products Safety Mark Implementation Rules guiding the factory assessments. The Safety Mark Center is the institution responsible for issuing and inquiring about coal safety certifications.
Shenzhen Zhongnuo Inspection offers coal safety certification and consulting services, well-versed in the entire certification process and requirements. With a team of explosion-proof technology engineers and factory audit specialists, we can facilitate a quick and convenient application for coal safety certification. Our successful cases include light boxes, remote controls, fiber optic temperature measurement devices, sensors, air compressors, mobile phones, thermal imaging cameras, and patrol robots.
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What are the requirements for applying for the Coal Safety/Mine Safety Mark? -- Shenzhen ZhongNuo Inspection & Testing Technology Co., Ltd.
(1) Meets coal mine safety production requirements, in compliance with current standards, industry safety standards, and the "Coal Mine Safety Regulations."
(2) Correct and complete technical documentation provided.
(3) New products produced with new materials, technologies, and processes should have an evaluation opinion from the relevant departments.
(4) Other pertinent conditions.

What is the difference between applying for the ATEX certification and the Coal Mine Safety certification?
intrinsic safety certification, also known as intrinsic safety explosion-proof certification.
In the explosion-proof industry, there are various types of explosion-proof protection, such as flameproof, intrinsic safety, increased safety, positive pressure, and cast resin, etc.
intrinsic safety is just one type of explosion-proof design. Equipment using this type of explosion-proof design in explosive areas is inherently safe. This is because the working voltage, current, capacitance, inductance, and other parameters are restricted, ensuring that even if sparks are generated within the circuit, they are not sufficient to ignite the surrounding explosive environment.
The intrinsic safety certification is widely used in low-power, low-energy instruments, handheld terminal products, and other 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 coal mine shafts, electrical equipment used in coal mine shafts must be equipped with protective measures to achieve explosion-proof performance.
You can choose the appropriate explosion-proof protection type, such as intrinsic safety, flameproof, and sealed immersion, based on product structure, electrical parameters, installation method, and operating area.
It's worth noting that electrical equipment applying for the Coal Safety Certification must not only possess explosion-proof capabilities but also meet performance tests for the special environment underground in coal mines.
Chino Inspection has long been dedicated to explosion-proof certification and coal mine safety certification, well-versed in certification standards and product explosion-proof design, rectification, testing, certification, and factory audit processes and requirements. We can assist companies in swiftly applying for explosion-proof and coal mine safety certifications.

Preparation of Coal Safety and Mine Safety Certification Samples -- Shenzhen ZhongNuo Testing Technology Co., Ltd.
The prototype manufacturing is completed according to the design drawings. The project team establishes the inspection outline based on the company and industry standards, and the Quality Assurance Department conducts the factory inspection according to the inspection outline. Note: In addition to preparing the prototype, electrical products also require preparation of electrical components for safety tests, such as intrinsically safe power supplies and sensors; and electrical performance tests, such as contactors, circuit breakers, and isolators, etc.
Coal Safety Certification and Mine Safety Certification Consulting Services - Shenzhen Zhongnuo Inspection Technology Co., Ltd.