Gas groups in hazardous area classification

[ravisasi]

Dear Professionals,

I need to know the, how to identfy the gas groups for making hazarsdous area classification.

Can you give me a example for identiying gas groups
In mixtue of compounds in a vessel, how much volume we have to consider for release of flammable material

Please advise us, confusing about this matter

[ravisasi]

Please helpus in this matter,
How to identfy the gas grooup in mixture of compound

[ravisasi]

Please send any standard for identifying the gas groups for claffifying hazardous areaa
if any body having
please furnish

[ravisasi]

Please heplus in this matter
early reply would be appreciable

[DORIO]

Classification of Zones
Hazardous areas are classified into Zones, depending on the
composition and presence of an explosive atmosphere. This
enables both selection of suitable equipment and appropriate
electrical installation.
Classification of zones and use of equipment
Zone 0 Equipment with certificate of conformity or type test
certificate; especially approved for Zone 0.
Zone 1 Equipment with certificate of conformity or type test
certificate.
Zone 2 Equipment complying with the basic requirements of
Directive 94/9/EC (Equipment certified for Zone 0 and
Zone 1 can also be used).
Gases, Dusts Definition (94/9/EG)
vapours, explosive
mists atmosphere
is present
Zone 0 R Zone 20 R permanent,
category 1 G category 1 D long-term
Zone 1 R Zone 21 R occasional
category 2 G category 2 D
Zone 2 R Zone 22 R seldom or
category 3 G category 3 D short-period
G = gases, D = dusts

[f81aa]

Thank you, Dorio

[ravisasi]

Thank you very much for ur valvuble information
But i need, in a mixture of compounds how much volume % will be ignited

[vivek68]

Thank you very much for ur valvuble information
But i need, in a mixture of compounds how much volume % will be ignited

You may refer API 500 for international standards.

If you are in India , OISD 113 and ISO 5572/5571 may be referred

These standards are use for Hazardous area clasification. Ignition temp is basis for zones.

ignition temp can be lab data or obtd from table in above standards