Fuel oil storage
The term heating oil storage includes the storage and handling of heating oil . In Germany, the requirements for water protection (regulated in the ordinance on systems for handling substances hazardous to water ) and fire protection (regulated in the state firing ordinance FeuV ) must be taken into account.
In the case of heating oil storage, a basic distinction is made between underground storage and above-ground storage . For both variants, the storage containers must be set up in a tight and permanent collection area without drains - unless they are double-walled and equipped with a leak detector or leak detection system. In addition, the storage containers must have proof of suitability (DIN, type approval or suitability assessment).
Underground storage
The underground storage of the heating oil has the advantage of being spared from damage caused by the effects of the weather such as solar radiation, rain, snow and hail as well as mechanical disturbances, and no other usable (or anyway nonexistent) space is required inside the building. However, special consideration must be given to the external corrosion protection of the tanks, e.g. B. by means of a bitumen coating .
container
Therefore, underground tanks may only be used in double-walled construction (e.g. steel container according to DIN 6608), in single-walled construction with an inserted plastic cover or with a collecting tray around the tank. With these designs it is possible to visually or acoustically indicate a leak with the aid of a control liquid lying between the walls or a leak indicator operated in a negative or positive pressure system.
Installation guidelines
A number of installation guidelines must be met on site: The tank itself must be surrounded by stone-free earth and laid with a gradient of 1 to 2% towards the dome. The container according to DIN 6608 is designed for a maximum earth cover of one meter. A distance of one meter must be kept from property lines and other lines as well as from buildings, and 40 cm from other containers. In special cases such as near a river, increased groundwater level or in floodplains , it must be ensured that the tank does not float. This can e.g. B. can be achieved by a layering with a corresponding concrete ceiling or anchoring to a concrete base. The anchoring or loading of the tank must achieve a safety factor of 1.1 against the buoyancy of the empty tank.
Underground containers are subject to approval and inspection every five years in accordance with national regulations. In water protection areas , the obligation to test is reduced to 2 ½ years.
Above-ground storage
The widespread basement storage in residential buildings is above-ground storage. Single-walled containers are permitted because leaks would be visible. In the event of failure, its volume must be able to be absorbed by a collecting basin. The drip pan can be bricked and must have an oil-proof coating. Alternatively, the storage room can be prepared as a collecting basin by painting it with an oil-resistant coating. The paint height depends on the container volume.
container
In addition to single-walled steel containers, plastic battery containers made of glass fiber reinforced plastics as well as polyamide (PA) and polyethylene (PE) are used for storage. If the entire basement is to be used as a heating oil storage room, a steel tank manufactured on-site in accordance with DIN 6625 is ideal.
storage room
If the boiler room is used to store heating oil, a distance of one meter must be maintained between the boiler and the storage container. Alternatively, radiation protection is to be provided. A maximum of 5,000 liters may be stored in the boiler room, otherwise a separate heating oil storage room must be created.
Heating oil storage rooms are to be designed to be fire-resistant ( F90 ) and to be provided with fire-retardant (F30), self-closing doors and a collecting pan. Plasters and cements must be made impermeable to oil and the door threshold must be so high that leaking oil cannot escape. The floor drains have integrated heating oil barriers and catch any leaking oil. The maximum permitted storage quantity in the heating oil storage room is 100,000 liters.
Individual evidence
- ↑ German Association for Water Management, Sewage and Waste (Ed.): Underground storage, requirements for the installation site . Section: floodplains, high groundwater. Hennef February 2015, p. 23 .