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Currently, domestic explosion-proof certifications are categorized according to the application environments, such as gas-filled environments, dust-filled environments, and environments with mine gas. However, the certification standards applied to such products are generally based on the explosion-proof standards in the **GB3836, GB12476, and GB25286 series. They are as follows: Certification standards for explosion protection in explosive gas environments (partial list): 1. GB3836.1-2010 – Explosive atmospheres, Part 1: General requirements for equipment; 2. GB3836.2-2010 – Explosive atmospheres, Part 2: Equipment protected by flameproof enclosures “d”; 3. GB3836.3-2010 – Explosive atmospheres, Part 3: Equipment protected by increased safety type “e”; 4. GB3836.4-2010 – Explosive atmospheres, Part 4: Equipment protected by intrinsically safe type “i”; 5. GB/T3836.5-2017 – Explosive atmospheres, Part 5: Equipment protected by pressurized enclosures “p”; 6. GB/T 3836.6-2017 – Electrical equipment for explosive gas atmospheres, Part 6: Oil-immersed type “o”; 7. GB/T 3836.7-2017 – Electrical equipment for explosive gas atmospheres, Part 7: Sand-filled type “q”; 8. GB3836.8-2014 – Explosive atmospheres, Part 8: Equipment protected by “n-type” enclosures; 9. GB3836.9-2014 – Explosive atmospheres, Part 9: Equipment protected by encapsulation type “m”; 10. GB3836.11-2008 – Explosive atmospheres, Part 11: Method for determining the maximum test safe gap for equipment protected by flameproof enclosures “d”; 11. GB3836.12-2008 – Explosive atmospheres, Part 12: Classification of gas or vapor mixtures based on their maximum test safe gap and minimum ignition current; 12. GB3836.14-2000 – Electrical equipment for explosive gas atmospheres, Part 14: Classification of hazardous locations; 13. GB3836.20-2010 – Explosive atmospheres, Part 20: Equipment with an Equipment Protection Level (EPL) of Ga. https://pic3.zhimg.com/80/v2-fff44a40b7b064235d23f8a4534c7262_720w.jpg Certification standards for explosion protection in combustible dust environments (partial list): 1. GB 12476.1-2013 – Electrical equipment for combustible dust environments, Part 1: General requirements; 2. GB 12476.2-2010 – Electrical equipment for combustible dust environments, Part 2: Selection and installation; 3. GB 12476.3-2007 – Electrical equipment for combustible dust environments, Part 3: Classification of areas where combustible dust may be present; 4. GB 12476.4-2010 – Electrical equipment for combustible dust environments, Part 4: Intrinsically safe type “iD”; 5. GB 12476.5-2013 – Electrical equipment for combustible dust environments, Part 5: Enclosure-protected type “tD”; 6. GB 12476.6-2010 – Electrical equipment for combustible dust environments, Part 6: Encapsulation-protected type “mD”; 7. GB 12476.7-2010 – Electrical equipment for combustible dust environments, Part 7: Pressurized-protected type “pD”; 8. GB 12476.8-2010 – Electrical equipment for combustible dust environments, Part 8: Test methods – Determination of the minimum ignition temperature of dust; 9. GB 12476.9-2010 – Electrical equipment for combustible dust environments, Part 9: Test methods – Determination of the resistivity of dust layers; 10. GB 12476.10-2010 – Electrical equipment for combustible dust environments – Test methods: Determination of the minimum ignition energy of dust-air mixtures. https://pic3.zhimg.com/80/v2-18093c4cbb0cb8fbb55ec64915126736_720w.jpg Certification standards for non-electrical explosion-proof equipment (partial list): https://pic4.zhimg.com/80/v2-2df9577b80a042d7c8c9d807a31bfe63_720w.jpg Note: The above standards are **continuously being updated**.