Shenzhen Zhongnuo Testing Technology Co., Ltd. specializes in consulting services for explosion-proof certification and coal safety certification.
What is the difference between corrosion protection grade, protection grade, and explosion-proof certification grade?
Many corporate clients are often confused about the required corrosion resistance, protection, and explosion-proof certification levels for their products.
Due to the fact that there's only one character difference in their names, and both refer to a specific grade of the product, they are similar yet distinct. So, what are the differences between them?
Corrosion prevention involves measures to protect metals prone to rust, aiming to extend their service life. Typically, methods like physical, chemical, and electrochemical corrosion prevention are used. Common levels include indoor F1, F2, and outdoor WF, WF1, and WF2, totaling five grades.
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 explosion-proof certification level of the equipment. Each electrical equipment applying for explosion-proof certification will have a corresponding explosion-proof marking, including the type and grade of explosion-proof. The explosion-proof grade indicates the explosion-proof area applicable to the product, gas/dust groups, temperature groups, and equipment protection level, etc.
Clearly, these are different concepts in different fields. For more information, feel free to message Shenzhen ZhongNuo Inspection & Technology Co., Ltd. anytime!

Can the OEM model apply for the Coal Safety Certification? -- Shenzhen ZhongNuo Inspection Technology Co., Ltd.
This year, the Anbang Standard Center has gradually expanded the scope of applicants, including OEM production mode enterprises in the Anbang application range. This means that enterprises previously operating under the OEM production model can now apply for the Coal Safety Certification themselves. However, there is no actual implementation as of now. The potential issues that may arise during implementation remain unknown.
Please familiarize yourself with the following requirements prior to product application for your convenience.
Please first select the production address for the declared product. If the production address database does not contain the production address for the declared product, the applicant should choose "Add New Production Address" and then complete the production address information as required.
2. When the declared product is self-produced, the business scope of the applicant's legal person's business license should include the declared product; when the applied product is produced under the OEM model, the OEM production factory should be a legal entity, and its business scope of the legal person's business license must include the declared product.
3. When the production address is leased, the applicant should pay attention to the validity period of the lease agreement. If the declaration time is less than five years from the termination date of the lease agreement, the validity period of the safety mark will be affected by the validity period of the lease agreement.
4. For OEM-manufactured products, applicants should note the validity period of the OEM commissioning agreement. If the declaration time is less than five years from the termination date of the OEM contract, the validity period of the safety mark will be affected by the contract's validity.

Sample Preparation for Coal Mine Safety and Mine Safety Certification -- Shenzhen ZhongNuo Testing Technology Co., Ltd.
The sample machine is manufactured according to the design drawings. The project team establishes the production inspection outline based on the company's and industry standards, and the quality assurance department completes the factory inspection according to the production inspection outline. Note: In addition to preparing the sample machine, electrical products also require preparation of electrical components for intrinsic safety testing, such as intrinsic safety power supplies, sensors, etc.; as well as electrical components for electrical performance testing, such as contactors, circuit breakers, and isolators, etc.

How do I apply for another Mine Safety Certification with the existing Coal Safety Certification? -- Shenzhen ZhongNuo Testing Technology Co., Ltd.
If the product has already been certified with a Coal Safety Certificate, a new Mine Safety Certificate can be applied for using the original Certificate and Report.
You'll need to go through one more application process, but both time and costs will be significantly reduced. So, if you already have a Mine Safety Certification, how do you apply for a Coal Safety Certification?
If the product has already obtained the Mine Safety Certification, a new application for Coal Safety Certification is required, treating it as a new product.
Coal Safety Certification and Mine Safety Certification Consultancy Services - Shenzhen Zhongnuo Testing Technology Co., Ltd.