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Saturday, April 17, 2010

explosion proof cameras




EXPLOSION PROOF CAMERAS ELBEX

They are ideal for using in Coal Mines, Oil Refineries Oil Fields,

Chemical Factories …


ELBEX cameras are base on EEX Standard and they are capable

to use in Class II & I. In other words inHazardous areas

which an explosive atmosphere consisting of a Mixture with

air of flammable Substances In the form of gas, vapor or

mist is likely to occur in normal operation occasionally.

Moreover, they can Use in Coal Mines and underground

applications, which the Firedamp gas such as ‎Methane is

exist.

Standards:

1. Protection method of these cameras, in hazardous area,

is base on EN50014 & EN50018 standards.

2. Type of Protection essentially is (de) Increased Safety

and Flameproof Enclosures.

3. Ingress Protection Rating is (IP66) which totally protected

against dust and against heavy seas.

Flame proof Enclosure:

Most popular kind of protection is Flameproof Enclosure.

This standard equipment is A very sturdy Case specifically

designed for use in explosive atmospheres. The potentially

incentive components are Contained within an enclosure into

which the flammable atmosphere can enter but which will

contain any Resultant explosion and prevent it's transmission

outside the enclosure.There are two main methods of Protection

for The enclosures to contain the explosion and energy limiting

methods that ensure that if a Spark generate There is not enough

energy in the spark to ignite the atmosphere. Main character

(The "d” type Enclosure) is preventing an internal inflammation

from igniting the ambient atmosphere and Keeps the Outside

temperature of the enclosure below the ignition temperature of

the ambient gas vapors On the other hand, dusts, if it will avoid an

external explosion, it can be approved

(Acceptable to the Authority having jurisdiction).

Classification of Explosive Gases:

The most dangerous explosion is in IIC group, IIC being the most volatile and

the most easily ignited.





Temperature Classification:

Temperature class or ignition temperature of the gas or vapor involved

according to the table below:

T-Class Hazards which will not ignite at temperatures below:
T1 450°C
T2 300°C
T3 200°C
T4 135°C
T5 100°C
T6 85°C




Afzarniroo Engineering Company

By: Ashkan Karimi

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