Shenzhen ZhongNuo Testing Technology Co., Ltd. specializes in consulting services for explosion-proof certification and coal safety certification.
How do I apply for another Mine Safety Certification with the Coal Mine Safety Certification already in place? -- Shenzhen ZhongNuo Testing Technology Co., Ltd.
If the product has already undergone the Coal Safety Certification, a new Mine Safety Certification can be applied for using the original Certificate and Report. This requires going through the application process again, but it will significantly reduce the time and cost. So, how to apply for the Coal Safety Certification if there is already a Mine Safety Certification? If the product has already been certified for Mine Safety and needs to apply for the Coal Safety Certification, it must be applied for as a new product.

Now that we have the explosion-proof 3C certification, how can we convert it to the coal safety or mine safety certification? -- Shenzhen ZhongNuo Testing Technology Co., Ltd.
In China, explosion-proof 3C certification/examination certificate and coal safety/mining safety certification belong to different management systems, and the places where products are used are also different. The two certificates belong to different certification systems and are relatively opposed. Regardless of which certificate is held, the other certificate must be re-applied for according to the new application process for new products. Similarly, if a coal safety/mining safety certification is obtained, applying for an explosion-proof examination certificate or explosion-proof 3C certification also requires re-applying according to the new application process.

What is the Coal Mine Safety Certification?
Coal Mine Mark Certification (abbreviated as MA, KA Certification) is a mandatory certification implemented by the Coal Mine Safety Mark Office for products used underground in coal mines.
Products listed in the safety certification catalog for mining products must obtain certification. Individuals and organizations are prohibited from selling, purchasing, or using mining products included in the safety sign management catalog that have not obtained a safety sign.
To obtain a safety mark for their product manufacturing, the company must go through several steps: application form submission, preliminary review and qualification registration, evaluation, and certificate issuance.

What documents are required to apply for the Coal Safety/Mine Safety certification? -- Shenzhen ZhongNuo Testing Technology Co., Ltd.
(1) Corporate Standards
(2) Product Manual
(3) Product Drawings (circuit diagrams, PCB layouts, schematics, assembly drawings, hydraulic diagrams, location maps, etc.)
(4) Bill of Materials (BOM)
(5) Label, Factory Inspection Certificate, etc.
(6) Sample
Coal Safety Certification and Mine Safety Certification Consultancy Services - Shenzhen ZhongNuo Testing Technology Co., Ltd.