[Classes]

Class I
Flammable gases or vapors are present in the air in quantities sufficient to produce   explosive or ignitable mixtures.
防护易燃气体或蒸汽泄漏量达到爆炸或起火等级

Class II
Combustible or conductive dusts are present.
防护易燃尘埃或静电传导等级

ClassIII
Ignitable fibers or flyings are present, but not likely to be in suspension in sufficient quantities to produce ignitable mixtures. (Group classifications are not applied to this class.)
防护悬浮状纤维起火等级

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[Groups ]

Group A    Acetylene
 
Group B    Hydrogen (or gases of equivalent hazard)
 
Group C    Ethylene (or gases of equivalent hazard)
 
Group D    Gasoline (or gases of equivalent hazard)
 
Group E    Metal Dust
 
Group F    Coal Dust
 
Group G    Grain Dust

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[Multiply This known value Pressure]

BAR
Kilo Pascals (kPa)
Mega Pascals (mPa)
Kilograms per CM2(kg/cm2)
Pounds Per Square Inch (psig)
Pounds Per Square Inch (psig)
Pounds Per Square Inch (psig)
Pounds Per Square Inch (psig)

[by this conversion factor]

14.504
0.145
145
14.223
14.223
14.223
14.223
14.223

[to get this desired value]

Pounds Per Square Inch (psig)
Pounds Per Square Inch (psig)
Pounds Per Square Inch (psig)
Pounds Per Square Inch (psig)
Pounds Per Square Inch (psig)
Pounds Per Square Inch (psig)
Pounds Per Square Inch (psig)
Pounds Per Square Inch (psig)

名词解释

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