Execution standards for explosion-proof product certification

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Explosion protection certification is the process of determining whether a device meets the requirements of explosion protection standards, carrying out type tests and appropriate routine tests, and issuing the corresponding certification. The certificate can apply to Ex equipment or Ex components. What explosion-proof standards are referred to here? Based on whether they are energized or not, explosion-proof products are divided into explosion-proof electrical equipment and explosion-proof non-electrical equipment ； Based on whether the explosive medium used in a particular area is a gas or dust, there are gas explosion prevention standards and dust explosion prevention standards ； Depending on the explosion-proof type adopted by the product, there are various types such as intrinsically safe, flameproof, and encapsulated types. . . . . . Here, the editor summarizes the common explosion-proof types and explosion-proof certification standards available at present for your reference. I. Electrical equipment used in explosive gas environments
1. Explosion protection type: Intrinsic safety type
Applicable explosion protection standards:
GB3836.1-2010 – Explosive atmospheres – Part 1: Equipment – General requirements
GB3836.4-2010 – Explosive atmospheres – Part 4: Equipment protected by intrinsic safety “i”
2. Explosion protection type: Flameproof type
Applicable explosion protection standards:
GB3836.1-2010 – Explosive atmospheres – Part 1: Equipment – General requirements
GB3836.2-2010 – Explosive atmospheres – Part 2: Equipment protected by flameproof enclosures “d”
3. Explosion protection type: Increased safety type
Applicable explosion protection standards:
GB3836.1-2010 – Explosive atmospheres – Part 1: Equipment – General requirements
GB3836.3-2010 – Explosive atmospheres – Part 3: Equipment protected by increased safety type “e”
4. Explosion protection type: Pressurized type
Applicable explosion protection standards:
GB3836.1-2010 – Explosive atmospheres – Part 1: Equipment – General requirements
GB/T 3836.5-2017 – Explosive atmospheres – Part 5: Equipment protected by pressurized enclosures “p”
5. Explosion protection type: Oil-immersed type
Applicable explosion protection standards:
GB3836.1-2010 – Explosive atmospheres – Part 1: Equipment – General requirements
GB/T 3836.6-2017 – Electrical equipment for explosive gas atmospheres – Part 6: Oil-immersed type “o”
6. Explosion protection type: Sand-filled type
Applicable explosion protection standards:
GB3836.1-2010 – Explosive atmospheres – Part 1: Equipment – General requirements
GB/T 3836.7-2017 – Electrical equipment for explosive gas atmospheres – Part 7: Sand-filled type “q”
7. Explosion protection type: Type “n”
Applicable explosion protection standards:
GB3836.1-2010 – Explosive atmospheres – Part 1: Equipment – General requirements
GB3836.8-2014 – Explosive atmospheres – Part 8: Equipment protected by type “n”
8. Explosion protection type: Encapsulated type
Applicable explosion protection standards:
GB3836.1-2010 – Explosive atmospheres – Part 1: Equipment – General requirements
GB3836.9-2014 – Explosive atmospheres – Part 9: Equipment protected by encapsulated type “m”

II. Electrical equipment used in combustible dust environments
1. Explosion protection type: Intrinsic safety type
Applicable explosion protection standards:
GB 12476.1-2013 – Electrical equipment for use in combustible dust atmospheres – Part 1: General requirements
GB 12476.4-2010 – Electrical equipment for use in combustible dust atmospheres – Part 4: Intrinsic safety type iD
2. Explosion protection type: Enclosure-protected type
Applicable explosion protection standards:
GB 12476.1-2013 – Electrical equipment for use in combustible dust atmospheres – Part 1: General requirements
GB 12476.5-2013 – Electrical equipment for use in combustible dust atmospheres – Part 5: Enclosure-protected type tD
3. Explosion protection type: Encapsulated type
Applicable explosion protection standards:
GB 12476.1-2013 – Electrical equipment for use in combustible dust atmospheres – Part 1: General requirements
GB 12476.6-2010 – Electrical equipment for use in combustible dust atmospheres – Part 6: Encapsulated protection type mD
4. Explosion protection type: Pressurized type
Applicable explosion protection standards:
GB 12476.1-2013 – Electrical equipment for use in combustible dust atmospheres – Part 1: General requirements
GB 12476.7-2010 – Electrical equipment for use in combustible dust atmospheres – Part 7: Pressurized protection type pD

III. Non-electrical equipment used in explosive hazardous areas
1. Explosion protection type: Current-limiting enclosure type
Applicable explosion protection standards:
GB 25286.1-2010 – Non-electrical equipment for use in explosive atmospheres – Part 1: Basic methods and requirements
GB 25286.2-2010 – Non-electrical equipment for use in explosive atmospheres – Part 2: Current-limiting enclosure type “fr”
2. Explosion protection type: Flameproof enclosure type
Applicable explosion protection standards:
GB 25286.1-2010 – Non-electrical equipment for use in explosive atmospheres – Part 1: Basic methods and requirements
GB 25286.3-2010 – Non-electrical equipment for use in explosive atmospheres – Part 3: Flameproof enclosure type d
3. Explosion protection type: Structurally safe type
Applicable explosion protection standards:
GB 25286.1-2010 – Non-electrical equipment for use in explosive atmospheres – Part 1: Basic methods and requirements
GB 25286.5-2010 – Non-electrical equipment for use in explosive atmospheres – Part 5: Structurally safe type c
4. Explosion protection type: Ignition source control type
Applicable explosion protection standards:
GB 25286.1-2010 – Non-electrical equipment for use in explosive atmospheres – Part 1: Basic methods and requirements
GB 25286.6-2010 – Non-electrical equipment for use in explosive atmospheres – Part 6: Ignition source control type “b”
5. Explosion protection type: Liquid-immersed type
Applicable explosion protection standards:
GB 25286.1-2010 – Non-electrical equipment for use in explosive atmospheres – Part 1: Basic methods and requirements
GB 25286.8-2010 – Non-electrical equipment for use in explosive atmospheres – Part 8: Liquid-immersed type k

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