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Explosion Proof Electrical Equipment

What is the meaning of Explosion Proof?

For a product to be classified as “Explosion Proof”, it means that the enclosure of the product must be able to internally withstand:

  • Any internal explosion.
  • Any sparks generated internally and preventing these sparks from igniting any vapors, gases, fibers or dust in the surrounding environment.

This also means that we should not make the mistake that Explosion Proof Electrical Products are able to withstand any external explosion(s) that happens outside of the enclosure, rather it is the ability of the enclosure to prevent any internal explosion or sparks from escaping into the external environment and being the cause of a larger explosion.

Normally, explosion proof products are used in hazardous locations to reduce risk and increase safety of workplace operations. You can find out more regarding the different hazardous locations here.

Therefore, using Explosion Proof products would benefit you in the following ways:

  • Safety

No employee would want to work in an unsafe environment or expose themselves to unnecessary risk in hazardous environments. This would allow your employee to focus on his/her job and boost productivity and morale. Your employees would be at ease knowing they are working at an organization that values their safety by using explosion proof products.

  • Reputation

Your organization’s reputation is definitely an important factor and using explosion proof products would help in that aspect by minimizing any external explosions and mishaps. This would ensure a clean safety record and encourage other organizations to work with yours. Future employees might also research on your company before deciding to join so it would be beneficial to have a good safety record.

  • Cost Benefits

By using certified explosion proof products, you would minimize damage to your facility by containing any explosion to within the enclosure itself and not to the surrounding areas. Another important fact is any reduced external explosion would minimize any risk to your staff and reduce greatly the chance for cost relating to medical claims or staff suing your company for any workplace mishaps.

There are 2 main certification bodies that certify explosive proof equipment:

  • ATEX directive
  • IEC/IECEx

You can find out more about the above 2 independent certifications here.

Different Types of Explosion Proof Ratings and Environments

IEC stands for International Electrotechnical Commission, a non-profit, non-governmental international standards organization that prepares and publishes International Standards for all electrical, electronic and related technologies – collectively known as "electrotechnology".

  1. Type of protection

Description

Type

New Number (IEC)

General rules

-

EN-60079-0

Oil immersed

Ex “o”

EN-60079-6

Pressurization

Ex “p”

EN-60079-2

Power filling

Ex “q”

EN-60079-5

Flameproof enclosure

Ex “d”

EN-60079-1

Increased safety

Ex “e”

EN-60079-7

Intrinsic safety

Ex “i”

EN-60079-11

Non sparking

Ex “n”

EN-60079-15

Encapsulation

Ex “m”

EN-60079-18

 

  1. Equipment group

Place of use

Group

Areas

Representative gas

Mines Susceptible
to Firedamp

I

Gaseous Mines

Methane

Surface industries

II A

Surface

Propane

II B

Ethylene

II B + H2

Ehtylene, Hydrogen

II C

Hydrogen, Acetylene

 

  1. Equipment protection level (gas/dust)

Gas Atmosphere

Zone 0

An area in which the mixture of explosive gas is constantly present (ex. the inside of a fuel tank).

Zone 1

An area in which a mixture of explosive gas may be present during the normal operation of the plant.

Zone 2

An area in which the mixture of explosive gas is not normally present, but is only present for brief periods of time.

Dust Atmosphere

Zone 20

An area in which the mixture of explosive powder is constantly present (ex. the inside of fuel tank).

Zone 21

An area in which a mixture of explosive powder may be present during the normal operation of the plant.

Zone 22

An area in which the mixture of explosive powder is not normally present, but is only present for brief periods of time.

 

  1. Temperature class

Temperature class

T1

T2

T3

T4

T5

T6

Maximum Surface

450oC

300oC

200oC

135oC

100oC

85oC

 

  1. Ingress protection (IP)

First figure indicates protection against dangerous access and solid foreign objects

Index

IP

Index

Second figure indicates protection against water penetration

Non-protected

0

 

0

Non-protected

Protected against solid objects 50 mm Ø or more

1

 

1

Protected against vertically falling water drops

Protected against solid objects 12.5 mm Ø or more

2

 

2

Protected against vertically falling drops water enclosure tilted up to 15º

Protected against solid objects 2.5 mm Ø or more

3

 

3

Protected against spraying water up to 60º from vertical

Protected against solid objects 1 mm Ø or more

4

 54

4

Protected against splashing water from any direction

Dust-protected

5

5

Protected against jets of water from any direction

Dust-tight

6

 

6

Protected against powerful jets of water from any direction

7

Protected against immersion

8

Protected against continuous immersion

The minimum requirement for Explosion-Proof protection is IP54.

Supermec Explosion Proof Products

explosion proof products

Since 1977, our consolidated experiences in the field of Explosion Proof Electrical Equipment and ATEX products have allowed us to study, design and manufacture a completely new range of products suitable to be used in any hazardous areas such as chemical, petrochemical and pharmaceutical industries, Oil & Gas onshore/offshore plants, refineries and marine/shipping industries, including the most highly corrosive environments.

We are confident in consistently meeting your needs and quality standards.

Our range of Explosion Proof Electrical Equipment and ATEX products are manufactured with the latest available technologies, both mechanical and electrical, using materials that guarantee the best protection against corrosive agents as well as to provide you with modern functionality and long durability at the same time.

We have the following range of fully customizable explosion proof products for hazardous areas:

  • Ex-proof Junction Boxes & Control Equipment
  • Ex-proof Earthing Grounding Control Systems
  • Ex-proof Lighting Fixtures
  • Ex-proof Cable Glands
  • Ex-proof Plug & Sockets

We would love to speak to you further.

Contact our friendly sales team at sales@supermec.com or you can drop us a call at +65 68619522 to find out more about our wide range of explosion proof products and solutions.