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FAQ

Passive storage is the storage of flammable liquids in containers that are securely sealed and that are not filled or disposed of in the store or opened for any other purposes.

Active storage is the storage of flammable liquids in non-stationary vessels that are used at their storage location as stationary removal or collection containers or opened for other purposes.

If filling or transfer is carried out on the safety storage cabinet (= active storage), operation without an industrial exhaust system is not permissible. For storage of sealed containers (passive storage), operation without an industrial exhaust system is permitted provided the following requirements for the containers to be stored are satisfied:

    The containers stored must be sealed tightly.
    They must be inspected regularly for leaks.
    Opening of the containers must not be possible.

This must be documented in the explosion protection document, and the resulting ex-zones around the safety storage cabinet must be maintained:

  • If a safety storage cabinet does not have industrial ventilation, the interior may pose an explosion hazard and is thus classified as ex-zone 2. The area around the safety storage cabinet is not an ex-zone.
  • However, if any of the aforementioned conditions regarding containers is not satisfied, the interior of the safety storage cabinet is classified as ex-zone 1 and the surrounding area to a distance of at least 2.5 m from the cabinet and up to a height of at least 0.5 m above the floor is classified as a potentially explosive area, i.e. ex-zone 2.
  • In working spaces with industrial ventilation with at least a five-fold air exchange per hour, the potentially explosive area of zone 2 can be reduced to 1 m in front of the safety storage cabinet, 0.5 m on either side of the cabinet and a height of 0.3 m above the floor.

For passive storage, operation with an industrial exhaust system with a minimum of 10-fold continuous air exchange per hour is therefore advisable. In this case, no ex-zones are assigned to the cabinet.

The air exchange rate is specified by the operator as part of the risk assessment for the workplace. Generally accepted values can be used as the basis for determining the rate:

For passive storage of flammable liquids, at least a 10-fold air exchange per hour is recommended to avoid the formation of an ex-zone. A higher rate of air exchange may be necessary to reduce odours.

For active storage of flammable liquids, the safety storage cabinet must be operated with an air exchange rate of at least 21 m³/h and the ventilation function must be monitored.

Flammable gases should be stored with at least a 10-fold air exchange per hour, and toxic gases with at least a 120-fold air exchange per hour.

Safety storage cabinets without industrial ventilation and safety storage cabinets for active storage must be earthed by equipotential bonding to avoid ignition hazards.

A fire-resistant safety storage cabinet, e.g., Type 90 or Type G90, is not suitable for outdoor use. The safety storage cabinet must be operated inside a building, protected from moisture and within a temperature range between -5 °C and 45 °C.

We offer alternative solutions for storing hazardous substances outside of buildings, such as safety storage containers.

DÜPERTHAL safety storage cabinets have been type-tested and certified accordingly. Any modification will result in the loss of their TÜV certificate, and may also impair their function. Please refer to your personal contact person at DÜPERTHAL to discuss your storage situation and find the best possible solution for you.

No, because these two cabinet types are built according to different construction requirements and standards. Safety storage cabinets for storing pressurised gas cylinders are built, tested and certified according to DIN EN 14470-2, and safety storage cabinets for storing flammable liquids are built, tested and certified according to DIN EN 14470-1.

If different hazardous substances are stored together, this may give rise to additional hazards. Therefore, it is only permissible to store hazardous substances together if their joint storage does not increase the respective risks. In general, ignitable liquids must not be stored in safety storage cabinets together with hazardous substances which are capable of causing a fire. Please compare the information in the hazardous substance data sheets with the co-storage charts for the storage categories. This information must be documented in the risk assessment. If necessary, please contact the manufacturer of the hazardous substance.

Ignitable gases (hydrogen) and oxidising gases (oxygen) may be stored together in safety storage cabinets that comply with DIN EN 14470-2 with certain limitations. Please comply with the guidelines in the safety data sheets issued by the hazardous substance manufacturers and the national regulations.

DÜPERTHAL has an extensive network of established distributors all over the world. Simply call us and we will be glad to advise you on the best way to place orders quickly and inexpensively from your country.

DÜPERTHAL safety storage cabinets are made to order. The normal production time is around 4-6 weeks after receipt of the written order.

For current cabinet models, the technical data sheet can simply be downloaded from our website: Simply enter the item number of the cabinet - which you can find on the sticker on the cabinet door - in the search box on our website and then select the “Data sheet” tab.

You can find a copy of the appropriate certificates in the operating instructions for your safety storage cabinet. However, for current cabinet models, the certificates can also be downloaded from our website: Simply enter the item number of the cabinet - which you can find on the sticker on the cabinet door - in the search box on our website and then select the “Certificates” tab.

Please contact our Service department on +49 6188 9139-157 or service@dueperthal.com.

Please let us know the key number for the corresponding lock. It is engraved on the locking cylinder, for example. With this key number you can order a replacement key directly from our Service department on +49 6188 9139-157 or service@dueperthal.com.

According to BetrSichV, TRGS 526, TRGS 510, ArbStättV and the maintenance interval indicated by the manufacturer, all safety-relevant features have to be checked by a qualified person once a year in accordance with TRBS 1203. In order to meet this obligation and to ensure that the safety-relevant features continue to function properly, we recommend that the safety storage cabinets be checked by one of our service technicians once a year.

Please note that in the event of damage or a fire insurers, professional associations and other auditing bodies will immediately require proof of uninterrupted annual maintenance certifications, and that a valid test label must be present.

You can contact our Service department directly on +49 6188 9139-166 or service@dueperthal.com.

Please make sure that the cabinet is aligned correctly. If the problem persists, please contact our Service department directly on +49 6188 9139-166 or service@dueperthal.com.

Please contact our Service department directly on +49 6188 9139-166 or service@dueperthal.com.

This procedure is explained in detail in the operating instructions. Please follow the steps described there.

The guarantee period is defined in detail in our terms and conditions of business.

Can’t find your question? We are happy to help.

Use the free hotline, write us an e-mail, or use our contact form.

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