WHAT IS ATEX CETIFICATION?

According to the ATEX directive(from fr. Atmosphères Explosibles) 2014/34/EU of the European Parliament, all products intended for work in potentially explosive atmospheres must meet strict safety and health requirements. The level of essential safeguards and the related assessment procedures depend directly on the level of threat and the environment in which the device will operate.
 
The ATEX Certificate is issued by an accredited certification unit as a confirmation of a positive result of thorough research including the design, prototype and production process along with constant monitoring of the final product as well as periodic audits of the production plant.

 

EXPLOSION HAZARD ZONES

As a zone of explosion hazard, one should understand the space in which mixtures of gases, vapors, mists and / or flammable dusts with air can occur.

Depending on the source and frequency of occurrence of the threat, we divide the zones into:

Podzial stref

EXAMPLE OF THE EX MARKING:

Oznaczenie Ex

 

Description of the example marking:

Explosion-proof luminaire designed to work in places where, during normal operation, an explosive atmosphere may occur containing a mixture of flammable substances in the form of gas, vapor, mist or dust with air. Explosion-proof protection was provided through a reinforced housing. The device can be used in the vicinity of gases classified as so-called a hydrogen group (e.g. acetylene, hydrogen) whose auto-ignition temperature is higher than 135 °C. The maximum surface temperature of the product does not exceed 65 °C. The luminaire has been protected against dust penetration into its interior due to its high IP66 protection rating and can be used in the vicinity of all types of combustible dust (including conductive ones with an electrical resistivity lower than 106Ω).

 

 GROUPS OF EXPLOSION-PROF DEVICES:

GROUP
DESCRIPTION
I
device intended for use in mining plants, where there is a methane hazard or a coal dust explosion hazard
II
device intended for use in places at risk of explosive atmospheres other than mining plants

 

CATEGORIES OF EXPLOSION-PROOF DEVICES WITH REGARD TO THE ZONE OF EXPLOSION OF GAS, VAPOR AND FLAME OF FLAMABLE FLUIDS WITH AIR

CATEGORY
WORK ATMOSPHERE
 
EX ZONE MARKING
ENDANGERED AREA
1
G
0

occurs constantly, for long periods of time or
often

2
G
1

may occur during normal operation,
occasionally

3
G
2

does not occur during normal operation,
when it occurs it lasts shortly

 

CATEGORIES OF EXPLOSION-PROOF DEVICES WITH REGARD TO THE ZONE OF EXPLOSION OF DUST AND COMBUSTIBLE FIBERS

CATEGORY
WORK ATMOSPHERE
EX ZONE MARKING
ENDAGNERED AREA
1
D
20

occurs constantly, for long periods of time or
often

2
D
21

may occur during normal operation,
occasionally

3
D
22

does not occur during normal operation,
when it occurs it lasts shortly

 

TYPES OF CONSTRUCTION OF DEVICES IN AREA ENDANGERED OF EXPLOSION OF GAS, VAPOR AND MIXTURE OF FLAMMABLE FLUIDS WITH AIR
HOUSING TYPE
DESCRIPTION
PROTECTION DEGREE
EX ZONE MARKING
EPL
op is
safe optical radiation
very high
0,1,2
Gb
d lub db
flameproof construction
high
1,2
e lub eb
reinforced construction
ib
intrinsically safe construction
mb
construction encapsulated with isulating mass
ic
intrinsically safe construction
normal
2
Gc
mc
construction encapsulated with isulating mass
nA
non-sparking device
nC
device with shielded terminals

 

TYPES OF CONSTRUCTION OF DEVICES IN AREA ENDANGERED OF EXPLOSION OF DUST AND COMBUSTIBLE FIBERS

HOUSING TYPE
DESCRIPTION
PROTECTION DEGREE
EX ZONE MARKING
EPL
op is safe optical radiation very high 20,21,22 Db
tb ochrona przez obudowę high
21,22
lb intrinsically safe construction
mb protection trough encapsulation
tc protection through the housing normal
22 Dc
lc intrinsically safe construction
mc protection through encapsulation
p protection through hypertension

 

GROUPS OF EXPLOSION GASES VAPORS AND MIXTURE OF FLAMMABLE FLUID WITH AIR

LEVEL OF PROTECTION DESCRIPTION EXAMPLES
IIA
propane group

propane, acetone, benzene, acetic acid, methanol, gasoline, diesel oil, aviation fuel, carbon monoxide

IIB
etylen group
ethylene, city gas, hydrogen sulphide
IIC
hydrogen group
hydrogen, acetylene, carbon disulphide

  

STOPNIE WYBUCHOWOŚCI GAZÓW

GROWTH OF EXPLOSION LEVEL

- IIC group devices meet all the requirements for group IIA and IIB equipment

- IIB group devices meet all the requirements for group IIA equipment

 

GROUPS OF EXPLOSION FOR DUST

LEVEL OF PROTECTION DESCRIPTION EXAMPLES
IIIA
volatile combustible dusts
fiber, wood, paper, cotton
IIIB
volatile non-conductive dusts
coal, coke
IIIC
volatile conductive dusts
metal filings

 stopień wybuchowości pyłów

 GROWTH OF EXPLOSION LEVEL

- IIIC group devices meet all the requirements for group IIIA and IIIB equipment

- IIIB group devices meet all the requirements for group IIIA equipment

 

TEMPERATURE CLASSES OF DEVICES IN AREA ENDANGERED OF EXPLOSION OF GAS, VAPOR AND MIXTURE OF FLUIDS WITH AIR

TEMPERATURE CLASS
MAXIMUM SURFACE TEMERATURE
TEMPERATURE OF SELF-IGNITION OF GAS/VAPOR
T1 450OC

>450OC

T2 300OC >300OC
T3 200OC >200OC
T4 135OC >135OC
T5 100OC >100OC
T6 85OC >85OC

 Klasy temperaturowe

THE SCOPE OF APPLICATION OF EQUIPMENT DEPENDING ON THE TEMPERATURE CLASS

- devices with class T6 can replace devices with classes T5, T4, T3, T2, T1
- devices with class T5 can replace devices with classes T4, T3, T2, T1
- devices with class T4 can replace devices with classes T3, T2, T1
- devices with class T3 can replace devices with classes T2, T1
- devices with class T2 can replace devices with classes T1

 

TEMPERATURE CLASSES OF DEVICES IN AREA ENDANGERED OF EXPLOSION OF DUST AND COMBUSTIBLE FIBRES 

For devices operating in the explosion hazard zone of dust and combustible fibers, the exact maximum temperature on the device surface should be determined [° C]. In the general designation of a series of products, it is permissible to give the temperature range for different versions of the device.

THE MOST COMMON SUBSTANCES WHICH FORM EXPLOSIVE ATMOSPHERE

GROUP IIA

GROUP IIB

GROUP IIC

Methane
Ethane
Propane
Butane
Acetone
Ammonia
Benzene
Carbon Monoxide
Toluene
Acetic Acid
Petrol
n-Haxane
Aviation Kerosene
Diesel
Heating Oil
Coke Oven Gas
Ethylene
Ethylene Oxide
Propylene Oxide
Crotonaldehyde
Hydrogen Sulfide
Ethyl Ether
Hydrogen
Acetylene
Carbon Disulphide

 

IGNITION TEMPERATURE OF EXEMPLARY EXPLOSIVE ATMOSPHERE SUBSTATION MAKE

GAS

IGNITION TEMP. oC

Acetone
465
Benzene
498
Butane 287
Ethane 472
Ethanol 363
Petrol 280
Hexane 223
Methane 537
Propane 432
Propylene 455
Styrene 490
Toluene 480
Hydrogen Disulfide 260

 

METALIC DUSTS

IGNITION TEMP. oC

Cloud Layer
Aluminum
650 760
Magnesium
620  490
Titanium 330  510
Zinc 630 430
Bronze 370 190
Chrome 580 400
Copper 630 430
Cadmium 570 250

 

FIBRE

IGNITION TEMP. oC

Cloud Layer
Cotton lint
 520
Flax 430  230
Rayon 520 250

 

NON-METALIC DUSTS

IGNITION TEMP. oC

Cloud Layer
Cocoa
420 200
Coffee
410 220
Corn dust
400 250
Sugar
350 400
Corn
480 220
Flour
480 220
Nylon
500 430
Polyethylene
450 380
Coal dust
610 180

 

 

Let's keep in touch!

 

Contact

ATM Lighting sp. z o.o.
ul. Budowlanych 31
80-298 Gdansk POLAND
EU VAT: PL9571058463
Court Register: 0000393130

ph.: +48 58 347 51 07
fax: +48 58 347 51 08