Technical foundation of explosion-proof equipment design: how explosive atmospheres are formed, how they are classified into zones, and how equipment is marked according to international standards.
In a way that can be easily and safely installed and used in all underground and above-ground industrial environments and in all types of cranes (single /double beam overhead cranes, single /double beam gantry cranes, jib cranes, wall cranes, etc.) they can be produced.
Ex-proof cranes are explosion-proof cranes. The purpose here is to use it in environments where flammable and explosive substances are present (January mines, paint shops, gunpowder plants, oil and petroleum products enterprises, etc.).) to minimize the risks that may arise from the crane. It provides high safety with carefully selected components taking into account the areas of use.
WIMAC CRANE ex-proof cranes are designed and manufactured to provide high processing performance and maximum uptime. Thanks to its modular structure, it is easy and fast to install and saves you time. So your work will not stop for a long time and you can start using it as soon as possible. It provides high accessibility for safe control and maintenance. It minimizes your maintenance costs with its quality and correctly selected components.
Explosive gases can explode with an ignition source such as a spark when they encounter oxygen in the air, as well as catch fire from the surface temperatures of equipment located in the same environment. Flammable powders are also suspended in the air or collapsed on a surface, while any spark that may come from outside, ignition, surface temperature, etc. they can burn or explode with it.
G Gas for Steam and Gas environments), D (Dust) coding is performed for dust environments.
Precautions that can be taken against combustion and explosions in industrial environments have been determined by various standards and regulations in the world.
1. First, determine whether the crane will operate underground (Device Group – I) or above ground (Device Group – II).
2. Determine the device category and explosive atmosphere environment (M1, M2, 1G, 2G, 3G, 1D, 2D, 3D)
3. Determine the explosive media group. (I,IIA,IIB,IIC,IIIA,IIIB,IIIC)
4. Determine the temperature class.
5. Determine your other special requests.
You can contact our technical office for a safe, ideal and correct choice.
An explosive atmosphere is defined as a mixture of dangerous substances with air, under atmospheric conditions, in the form of gases, vapours, mist or dust — in which, after ignition has occurred, combustion spreads to the entire unburned mixture.
Protective methods have been developed and defined in standards and regulations around the world to prevent loss of life, serious injuries and significant damage that explosions can cause.
In Turkey, "The Regulation on Equipment and Protective Systems to be Used in Potentially Explosive Environments (94/4/AT)" issued on 30.12.2006 via No. 26392 (4. rev) is in effect. This regulation is in parallel to the European Union Directive 94/9/EC.
Directive 94/9/EC — also known as "ATEX 95" or the "ATEX Equipment Directive" — concerns the approximation of the laws of Member States on equipment and protective systems intended for use in potentially explosive atmospheres.
The two widely used ways of reducing the risk of explosion are preventing release of dangerous substances to avoid creation of explosive atmospheres, and in potentially explosive atmospheres, preventing sources of ignition by using Ex-Proof Equipment.
Probability of a potential explosive atmosphere occurring, mapped to equipment group, category, explosion group and Equipment Protection Level (EPL).
| Zone | Probability of a Potential Explosive Atmosphere Occurring | |
|---|---|---|
| Gas | Dust | |
| 0 | 20 | Always, temporarily or often present. |
| 1 | 21 | Occasionally present. |
| 2 | 22 | Very seldom or only for a short period. |
| Equipment Group | Equipment Category | Explosion Group | EPL | Zones |
|---|---|---|---|---|
| I | M1 | I | Ma | NA |
| M2 | Mb | |||
| III | 1G | II A | Ga | 0 |
| 2G | II B | Gb | 1 | |
| 3G | II C | Gc | 2 | |
| 1D | Da | 20 | ||
| 2D | Db | 21 | ||
| 3D | Dc | 22 |
Technical breakdown of an ATEX / IECEx equipment marking string — what each segment means and how to read it for gas and dust environments.
This is a technical diagram explaining Explosion-Proof (Ex) Equipment Marking, based on ATEX / IECEx standards.
