The global explosion protection system can be divided into: Zone System (Global) and Division System (North America). The two explosion-proof systems are independent of each other!

Explosion-proof system distribution map

The proportion of Zone Division series used in North America

Three elements of explosion:

• Explosive substances: gases that can react with oxygen (air), Liquid, and solid. (Hydrogen, acetylene, methane, alcohol, Gasoline, flour, aluminum powder)
• Oxygen or air
• Ignition sources: including open flames, electrical sparks, mechanical sparks, Static spark, high temperature, chemical reaction.

One sentence summary: The ignition source is temperature and energy!

Three common explosion-proof principles:

• Control explosive substances (make explosive substances inaccessible To the detonation source, Ex P)
• Control the explosion range (control the explosion within a certain range, and its His scope is not affected, Ex d)
• Control the detonation source (eliminate the detonation source, reduce energy and temperature, Ex i).

One sentence summary: Control the three elements of explosion or control the scope of explosion

The key parameters that determine explosive substances: Explosive concentration, ignition temperature!

 

Explosion concentration range of common gases

Gas name	Lower explosive concentration limit	Upper explosive concentration limit
Methane	5.0	15
Propane	2.1	9.5
hydrogen	4.0	75.6
Ethanol	3.5	19
Ether	1.7	48
Acetylene	1.5	82

 

The ignition temperature of common gases

Gas	Ignition temperature (° C)
Methane	537
Acetylene	305
Propane	466
Hydrogen	560
Butane	365
Ether	170
Gasoline	260
Ammonia	630

 

Common types of explosion protection

Explosion-proof type	Mark	Detailed mark
Flameproof type	Ex d or "d"	"da", "db", "dc"
Intrinsically safe	Ex i or "I"	"ia", "ib", "ic"
Increased safety type	Ex e or "e"	"eb", "ec"
Encapsulation	m or "m"	"ma", "mb", "mc"
Pressurized Enclosures	Ex p or "p"	"pxb", "pyb", "pzc"
"N" type (Type of Protection)	Ex n or "n*"	"nR", "nC", "nA"
Enclosure Protection type	Ex t or "t"	"ta", "tb", "tc"

The different types of explosion protection are explained below, for you reference. If you have any doubts, please contact us.

Flameproof type

Zone system: "d"

Division system: "XP"

Allow internal explosion

Control the surface temperature

Can be used in Zone 1, Zone 2, Division 1, Division 2

 Note: "da" explosion-proof equipment can be used in Zone 0, the conditions are stricter, and there are few practical applications.

CES has 3 series of explosion proof lights belonging to Flameproof type (IEC/EN 60079-1)

CES-EX-LN Series Explosion Proof Led Linear Light

CES-EX-GB Series Explosion proof led high bay

CES-SC Series Explosion proof led hand light

 

Increased safety type

Zone system: "e"

A shock-resistant shell is required

Control the temperature of the internal and external surfaces

Minimum protection grade IP54

No arc, no spark

Can be used in Zone 1, Zone 2

Note: There is no explosion-proof type for the Division system.

CES-J Series Explosion proof LED Floodlights belonging to Increased safety type.

CES-EX-SF Series Explosion proof LED Luminaries belonging to Enclosure Protection type

 

Intrinsically safe type

Zone system: "ia / ib / ic"

Division system: "IS"

Limit energy; limit temperature

Can be used in: Zone 0, Zone 1, Zone 2, Zone 20, Zone 21, Zone 22, Division1, Division 2

 

 

Type n / Nonincendive

Zone system: "n"

Division system: "NI"

Equipment has no normally arcing parts ；

Thermal effects incapable of ignition ；

nA = no spark

nR = restricted breathing

nC = limit spark

nL = ic limited energy

Can be used in Zone 2, Division 2

 

 

Enclosure Protection type: Dust Ignition Protection By Enclosure

Zone system: "ta / tb / tc"

Division system: "DIP"

Control surface temperature;

Requirements for protection level IP 6X, IP 5X;

Can be used in: Zone 20, Zone 21, Zone 22, Division1, Division 2;

CESP explosion proof lighting products conform to a variety of explosion-proof type. If you are looking for explosion-proof lights for your project, please submit your requirements to us, and we will match you with suitable lamps.