Hazardous Area Classifications and explosion protection

Hazardous Area Classifications and explosion protection

1.Implementation Areas with potentially explosive atmospheres are divided into zones, equipment has to be divided into groups and categories. The labelling on the identification plate of certified equipment indicates in which zone the explosion protected equipment can be used.

2.Explosion-proof mark ：ExdibIICT6Gb/EXtDA21IP66T80℃

3.Division into explosion Temperature groups ：from T1 to T6

4.Division into explosion gas groups: from IIA to IIC.

Group IIA—Atmospheres containing propane, or gases and vapors of equivalent hazard.

Group IIB—Atmospheres containing ethylene, or gases and vapors of equivalent hazard.

Group IIC—Atmospheres containing acetylene or hydrogen, or gases and vapors of equivalent hazard.

5. Zone System

Gas：

A.Zone 0—Ignitable concentrations of flammable gases or vapors which are present continuously or for long periods of time.

B.Zone 1—Ignitable concentrations of flammable gases or vapors which are likely to occur under normal operating conditions.

C.Zone 2—Ignitable concentrations of flammable gases or vapors which are not likely to occur under normal operating conditions and do so only for a short period of time.

Dust：

A.Zone 20—An area where combustible dusts or ignitable fibers and flyings are present continuously or for long periods of time.

B.Zone 21—An area where combustible dusts or ignitable fibers and flyings are likely to occur under normal operating conditions.

C.Zone 22—An area where combustible dusts or ignitable fibers and flyings are not likely to occur under normal operating conditions and do so only for a short period of time.

Joiwo have many explosion proof telephone which use in the Hazardous Area for years’ experience.

As we know, An explosion proof product is usually housed in a frame made of cast aluminum or stainless steel, engineered and constructed to contain a flash or explosion. To fulfill an explosion proof rating, an enclosure should contain any explosion originating within its housing and prevent sparks from within its housing from igniting vapors, gases, dust or fibers in the air surrounding it.

Ningbo Joiwo is always ready to help you win and complete projects successfully by offering high-quality products, competitive prices and our professional services.