Shenzhen Zhongnuo Testing Technology Co., Ltd. specializes in consulting services for explosion-proof certification and coal safety certification.
What test projects are required to apply for an explosion-proof certificate?
Explosion-proof products require passing relevant test requirements of the explosion-proof standards to obtain an explosion-proof certification.
Different explosion-proof types, catering to equipment used in various explosive environments, require different explosion-proof testing items.
Many customers also want to know what types of tests are required for explosion-proof products? What specific requirements are there for the explosion-proof design of the product?
Next, let's take a look at some common explosion-proof testing items.
For instance, with intrinsic safety products, general test items include appearance and structure inspection, spark ignition test, dielectric strength, battery and battery pack testing, temperature rise test, transient energy test, and more.
Flameproof products mainly undergo tests including heat and cold resistance tests, internal ignition without propagation, shell pressure resistance, IP testing, temperature rise tests, etc.
Varying test items, tailored to different modules or components of the product, each test ensures the product meets explosion-proof standards and achieves the required explosion-proof performance.
If a company is designing explosion-proof products and is unaware of the explosion-proof standards requirements,
ZhongNuo Inspection offers guidance services for explosion-proof circuit and structure design, including explosion-proof standards, design essentials, drawing instructions, and can also act as an agent for explosion-proof testing and certification services.
Need this service? Feel free to DM Shenzhen Zhongnuo Inspection Technology Co., Ltd. anytime!

What documents are required to apply for the Coal Safety/Mine Safety certification?
(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 certification, etc.
Sample

Coal Safety/ Mine Safety Certification Differences
1. Distinctions in Definitions. Coal Safety Certification, abbreviated as MA Certification, is self-explanatory as it is used in underground coal mines. Mine Safety Certification, or KA Certification, is for non-coal mines and other metallic or non-metallic mines; this is the fundamental difference.
2. Testing varies. In the type testing stage, their testing is also quite different. For performance, coal safety-certified products and mine safety-certified products undergo testing based on the same industry standards. However, in terms of safety performance, coal safety certification requires explosion-proof testing according to the explosion-proof standard GB/T 3836, while mine safety certification equipment's safety performance must be tested according to relevant industry standards. Coal safety certification is more inclined to prevent explosions, while mine safety certification is more focused on product safety performance, highlighting the difference in their type testing.

Do you need a factory audit to apply for the Coal Safety/Miner Safety Mark?
Required. Unlike obtaining a防爆 certification, stricter control is applied to the mining mark management.
Application for coal safety and mine safety certification requires a factory audit of the applicant company.
Manufacturing facilities can be production companies, assembly companies, or OEM enterprises.
Coal Safety Certification and Mine Safety Certification Consultancy Services - Shenzhen ZhongNuo Testing Technology Co., Ltd.