According to whether they are electrified or not, explosion-proof products are divided into explosion-proof electrical equipment and explosion-proof non-electrical equipment; according to whether the medium in the explosive place of use is gas or dust, they are divided into gas explosion-proof standards and dust explosion-proof standards; according to the different explosion-proof types adopted by the products, they are divided into intrinsic safety type, flameproof type, encapsulation type and other various explosion-proof types....

Here, STS summarizes the common explosion-proof types and Ex certification standards for your reference.

I. Electrical Equipment Used in Explosive Gas Places

1. Explosion-Proof Type: Intrinsic Safety Type  "i"

Applicable Explosion-Proof Standards:

GB/T 3836.1-2021 - Explosive atmospheres - Part 1: Equipment - General requirements

GB/T 3836.4-2021 - Explosive atmospheres - Part 4: Equipment protected by intrinsic safety "i"

2. Explosion-Proof Type: Flameproof Type "d"

Applicable Explosion-Proof Standards:

GB/T 3836.1-2021 - Explosive atmospheres - Part 1: Equipment - General requirements

GB/T 3836.2-2021 - Explosive atmospheres - Part 2: Equipment protected by flameproof enclosures "d"

3. Explosion-Proof Type: Increased Safety Type  "e"

Applicable Explosion-Proof Standards:

GB/T 3836.1-2021 - Explosive atmospheres - Part 1: Equipment - General requirements

GB/T 3836.3-2021 - Explosive atmospheres - Part 3: Equipment protected by increased safety "e"

4. Explosion-Proof Type: Pressurized Type "p"

Applicable Explosion-Proof Standards:

GB/T 3836.1-2021 - Explosive atmospheres - Part 1: Equipment - General requirements

GB/T 3836.5-2021 - Explosive atmospheres - Part 5: Equipment protected by pressurized enclosures "p"

5. Explosion-Proof Type: Oil Immersion Type "o"

Applicable Explosion-Proof Standards:

GB/T 3836.1-2021 - Explosive atmospheres - Part 1: Equipment - General requirements

GB/T 3836.6-2017 - Electrical equipment for explosive gas atmospheres - Part 6: Oil immersion type "o"

6. Explosion-Proof Type: Sand Filling Type "q"

Applicable Explosion-Proof Standards:

GB/T 3836.1-2021 - Explosive atmospheres - Part 1: Equipment - General requirements

GB/T 3836.7-2017 - Electrical equipment for explosive gas atmospheres - Part 7: Sand filling type "q"

7. Explosion-Proof Type: Type "n"

Applicable Explosion-Proof Standards:

GB/T 3836.1-2021 - Explosive atmospheres - Part 1: Equipment - General requirements

GB/T 3836.8-2021 - Explosive atmospheres - Part 8: Equipment protected by type "n"

8. Explosion-Proof Type: Encapsulation Type  "m"

Applicable Explosion-Proof Standards:

GB/T 3836.1-2021 - Explosive atmospheres - Part 1: Equipment - General requirements

GB/T 3836.9-2021 - Explosive atmospheres - Part 9: Equipment protected by encapsulation "m"

II. Electrical Equipment Used in Combustible Dust Places

1. Explosion-Proof Type: Intrinsic Safety Type "i"

Applicable Explosion-Proof Standards:

GB/T 3836.1-2021 - Explosive atmospheres - Part 1: Equipment - General requirements

GB/T 3836.4-2021 - Explosive atmospheres - Part 4: Equipment protected by intrinsic safety "i"

2. Explosion-Proof Type: Dust Ignition-Proof Enclosure "t"

Applicable Explosion-Proof Standards:

GB/T 3836.1-2021 - Explosive atmospheres - Part 1: Equipment - General requirements

GB/T 3836.31-2021 - Explosive atmospheres - Part 31: Equipment protected by dust ignition-proof enclosures "t"

3. Explosion-Proof Type: Encapsulation Type "m"

Applicable Explosion-Proof Standards:

GB/T 3836.1-2021 - Explosive atmospheres - Part 1: Equipment - General requirements

GB/T 3836.9-2021 - Explosive atmospheres - Part 9: Equipment protected by encapsulation "m"

4. Explosion-Proof Type: Pressurized Type

Applicable Explosion-Proof Standards:

GB/T 3836.1-2021 - Explosive atmospheres - Part 1: Equipment - General requirements

GB/T 3836.5-2021 - Explosive atmospheres - Part 5: Equipment protected by pressurized enclosures "p"

III. Non-Electrical Equipment Used in Explosive Hazardous Places

1. Explosion-Proof Type: Type "h"

Applicable Explosion-Proof Standards:

GB/T 3836.1-2021 - Explosive atmospheres - Part 1: Equipment - General requirements

GB/T 3836.28-2021 - Explosive atmospheres - Part 28: Non-electrical equipment for explosive atmospheres - Basic methods and requirements

GB/T 3836.29-2021 - Explosive atmospheres - Part 29: Non-electrical equipment for explosive atmospheres - Construction safety type "c", control of ignition sources type "b", oil immersion type "k"

The above information is compiled by STS. Reproduction and reprinting by any platform are strictly prohibited!