ATEX

Overview of CE certification ( ATEX Directive) for explosion-proof equipment :

ATEX explosive environments ( Atmosphere Explosive ) 1994 Nian 3 Yue 23 , the European Commission adopted the "equipment and protective systems used in potentially explosive atmospheres" ( 94/9 / EC ) directive. The new ATEX Directive 2014/34 / EU was 2014 released in, and in 2016 Nian 4 Yue 20 , was enforced, with no transition period.
    This directive covers mine and non-mine equipment. Unlike previous directives, it includes mechanical equipment and electrical equipment, and extends the potentially explosive environment to dust, flammable gases, flammable vapors and mist in the air. It sets out intended for use in potentially explosive   application of the technical requirements of the environmental equipment, basic health and safety requirements and conformity assessment procedures equipment put before the European market must be used in the context of its use.

The core requirements of the ATEX explosion-proof directive:

Protect people's safety and health, and under certain circumstances, protect the health of livestock and property, especially to protect workers from the hazards caused by equipment and systems applicable to potentially explosive environments. ATEX certification product range:
1. Products covered by
    ATEX certification ATEX certification applies to a particularly large range of equipment, which generally includes fixed offshore platforms, petrochemical plants, flour mills and other equipment that may have a potentially explosive environment.
1) ATEX certified electrical equipment :
    Electrical equipment refers to equipment that contains electronic components for generating, storing, distributing, and converting electrical energy or control equipment that uses electrical energy as energy.
2) ATEX certified non-electrical equipment that
    only has mechanical motion These moving parts will generate detonation sources (such as hot surfaces, frictional sparks, etc.) such as gearboxes, fans, compressors, brakes, mixers, and non-electrical equipment is usually connected to electrical equipment to provide kinetic energy.

2. Products not involved in ATEX certification:
1 ) Medical devices intended to be used in a medical environment
2 ) Those equipment and protective systems whose explosion hazard is entirely caused by explosive substances or unstable chemical substances;
3 ) Intended to be used in homes And equipment in a non-commercial environment, in this environment, potentially explosive gas is rarely formed;
4 ) If it occurs, it is only the result of a gas leakage accident;
5 )Personal protective equipmentincluded in Directive 89/686/EEC；

6 ) Nautical vessels and mobile offshore installations together with the equipment on them;
7 ) Means of transportation, that is, vehicles and trailers specially used to transport passengers by air or road, rail or water transportation network, and designed to pass air or road Or a means of transport for transporting goods on a rail network or waterway. Vehicles intended for use in explosive environments will not be included.

ATEX certification area classification

ATEX directive mounting apparatus according to the level of protection, the device may be divided into three categories:
( 1 ) a class ( the Category 1 ) - a very high level of protection

( 2 ) 2 class ( the Category 2 ) - a high level of protection

( 3 ) 3 type ( the Category 3 ) - a normal level of protection

Classification of equipment

1 , ATEX Directive according to the explosive environment of the device is divided into three categories:

1 type ( the Category Ⅰ, i.e. 0 Area ) - coal, methane environment

2 class ( the Category Ⅱ, i.e., an area ) - Factory gaseous environment

Ⅱ C : The representative gas is hydrogen

Ⅱ B : Representative gas is ethylene

Ⅱ A : The representative gas is propane

3 type ( the Category Ⅲ, i.e. 2 area ) - dust environment

Ⅲ C : Conductive dust

Ⅲ B : Non-conductive dust

Ⅲ A : Flammable fly

2. If the device is used in zone 0 , 1 or 2 , the category number is followed by a letter M/G/D

M represents the coal mine environment, G represents the gas environment, and D represents the dust environment.

3. The protection level of electrical equipment, of which a is the highest.

Coal Mine: EPL Ma EPL Mb

Gas: EPL Ga EPL Gb EPL Gc Dust: EPL Da EPL Db EPL Dc  

 Analysis of the meaning of the ATEX mark: