Special cold room for ATEX zone
Our explosion-proof cold stores and cold rooms are specifically designed to comply with the ATEX directive for the storage of flammable and explosive substances. Hazardous storage can occur in a variety of industries, from food to chemical, but our standard and custom-designed explosion-proof cold stores meet the needs of all sectors.
Our explosion-proof certified, ATEX-compliant cold stores can be used in the 0-10°C or even the deep-freezing (-18/-24°C) range.
Parametres
| Explosion proof cold room | Explosion proof freezer | |
|---|---|---|
| STORAGE TEMPERATURE | 0 / +10°C | -18/-24°C |
| PANEL THICKNESS | 60-100 mm | 100-200 mm |
| INSULATION | Mineral wool or PIR | PIR |
| ZONE CLASSIFICATION | Zone 1- 2, Zone 20-22 | Zone 1- 2, Zone 20-22 |
| VENTILATION | Optional, application dependent | Only emergency ventilation |
| DEFROSTING | Hot gas or static | Electric, EX heaters |
| CONTROL | PLC | PLC |
What are the differences between an ATEX cold room and a standard cold storage room?
If the storage method in a cold room is considered to be explosive, the complexity of design and construction is increased by the following phases:
- preliminary assessment,
- ATEX expert design, risk assessment
- electrical design,
- mechanical design,
- review,
- explosion protection documentation.
EX, also known as explosion-proof cold rooms must meet strict requirements. These custom-designed structures are always built to the customer’s requirements, taking into account the specifications and safety rules for the stored materials. ATEX cold storage rooms installed by our company are always approved by an ATEX post-construction inspection, which is carried out by a third party to enhance safety.
In the case of our EX cold rooms, all the electrical and mechanical connections are made using special sealing and fixing elements. The components of the cooling systems are also ATEX-compliant, in accordance with the zone classification. The wiring and electrical controls have spark-free electrical disconnections.
Depending on the type of material stored and the storage method, explosion proof cold storage design may require continuous fresh air supply in the cold room, increased ventilation according to gas concentration, or even immediate emergency ventilation. In case of a severe emergency, automatic power shutdown may also be required. Our company implements these tasks with PLC-controlled ventilation systems for ATEX cold room units, with automatic shutters, and advanced software, according to customer needs.
Features of ATEX explosion-proof cold rooms
Design of small and large size EX storages
We install equipment suitable for active or passive ATEX storage, with the proper, qualified components and a complex inspection.
ATEX-compliant air coolers
Only explosion-proof (XP) evaporators and refrigeration circuit elements of XP compliance are installed in the hazardous area in accordance with the regulations.
Explosion-proof (XP) fittings
Only explosion-proof electrical equipment will be installed in explosion hazard zones in accordance with the regulations.
Advanced PLC control
Safety PLC controls with security features are located outside the danger zone. Not only the PLC control but also proper spark-free disconnections and standard electrical wiring is essential.
Extreme pressure-resistant doors
Specially designed, highly fire retardant, high-pressure resistant cold room doors are installed, which is a useful peripheral for high-pressure gas extinguishing systems.
Air exchange and emergency ventilation
Providing general ventilation with explosion-proof air handling units, emergency exhaust fans, and ATEX motorized shutters. Provision of up to immediate fresh air exchange in the danger zone.
Special transfers
We use special cabling and engineering ductings to create air and gas-tight seals at all necessary points in the cold room. Ensuring a high level of safety design.
Gas concentration sensors
Special gas concentration sensors are an integral part of the control system. These calibrated instruments are used by the automated system to decide which function to trigger in case of a potential emergency.
Documentation on explosion protection
Explosion protection plans and blueprints are prepared in accordance with local fire safety engineering guidelines (TvMI) during both the design and construction phases.
Review of ATEX equipment
Our project managers are qualified to commission and inspect ATEX equipment. As well as that, we are also cooperating with the most experienced ATEX designers in Hungary.
Frequently asked questions about explosion protection
What are the criteria for a cold room to be classified as an explosion hazard zone?
The existence of an explosion hazard is influenced by three factors:
- the quality and characteristics of the material stored,
- ventilation and
- storage method.
If a material with a high risk of fire and explosion is stored, involving storage manipulation, i.e. the material may come into contact with the outside world, an estimate of the explosive volume is required. If 100 liters is reached, it is considered an explosive zone.
On this basis, the storage of explosive substances in passive storage does not result in an explosion hazard zone.
What are the requirements for electrical equipment in a hazardous area?
According to the 3/2003. (Mar. 11.) Joint Decree of the Ministry of Health and Family Affairs and the Ministry of Employment and Labour on the minimum requirements for improving the safety of workers potentially at risk from explosive atmosphere, which is the source of ATEX regulations in Hungary for cold storage, all electrical equipment in the hazardous area must be of special XP design. This applies to the elements of the air conditioning system, mechanical equipment, lamps, pumps, etc. In addition, choosing an explosion-proof design or conductor case for non-electrical equipment is recommended, as these can also be sources of ignition.
Derogations from the Regulation can only be made in special cases with the assistance of an explosion protection expert.
Is it mandatory to use permanent air exchange and gas detectors?
Regarding the ventilation for ATEX cold rooms, if gas detectors are installed in the cold room with adequate coverage, operational ventilation may be omitted, however emergency ventilation must always be provided. If the installation of gas detectors is not possible for any reason, continuous air exchange must be provided.
What are the regulations on loading and storage of goods?
The relevant requirements are detailed in Regulation MSZ 15633:2. However, we recommend shelf storage for our customers with explosive cold rooms, as this is generally subject to less stringent rules.
Contact us
If you have any questions about our services and products, or need expert advice, please contact us using any of the contact details below.
Ask for your free quote!
We are available to call Monday to Friday between 8:00 – 16:00, just dial the following number:
+36 37 / 737-500
We can be contacted via e-mail at all times at: info@hutoepito.hu. Also you are welcome to request a quote online.
