 |  | Passive Oil Barriers |
Passive barriers have to contain the spreading and drifting of mineral oils and mineral oil products or of solid waste swimming on the surface of the water and they should allow the recovery and removal of the above mentioned products without them causing damages. The barriers must keep a firm position in water even under the action of current, wind and waves. They must be able to float on the surface of the water for the whole time during their utilisation. Furthermore, the barriers must offer such a high stability as to be able to absorb the arising forces to which they are subjected. Owing to the action of waves, very strong tractive forces can develop.
BL-45, AR-70 and AR-85
These are vertical barriers, i.e. the floating elements have a vertical position. At the vertical barriers the barrier deflector and the part of the barrier protruding the water surface (freeboard) form one single body. The barrier deflector may cause stability problems, if the barrier is used in waters with heavy water flow. Thanks to the good balanced ratio between weight and buoyancy and the low profile of the barrier, the BL-45 is very well capable of taking the force coming from the water flow without overturning.
These are vertical barriers, i.e. the floating elements have a vertical position. At the vertical barriers the barrier deflector and the part of the barrier protruding the water surface (freeboard) form one single body. The barrier deflector may cause stability problems, if the barrier is used in waters with heavy water flow. Thanks to the good balanced ratio between weight and buoyancy and the low profile of the barrier, the BL-45 is very well capable of taking the force coming from the water flow without overturning.
BO-20 / BO-35, or BO-20 ASTM / BO-35 ASTM
20 cm is the diameter of the cylindrical part of the barrier (freeboard). At the cylindrical barriers the freeboard and the barrier deflector are two separate parts, contrary to the vertical barriers. The total height of the barrier consists of freeboard + barrier deflector, e.g. freeboard 20 cm + deflector 35 cm = total height 55 cm.
The barriers are intended for applications where a highly buoyancy reserve is required. If there are under water flows the barrier is not allowed to overturn.
The efficiency of a barrier device depends on how perfectly the barrier can adapt itself to the wave movements. This must be ensured by sufficient freedom of movement of the barrier segments between each other and by sufficiently high buoyancy reserve. (Buoyancy reserve = how many kilograms can be hanged on the barrier before it sinks under water). If the barriers are used for keeping back waste or rubbish, a high buoyancy reserve is needed, since the waste (e.g. pieces of wood) are collecting in front of the deflector and may cause the barrier to sink. Generally it can be stated, the longer the barrier deflector, the larger the diameter of the freeboard.
20 cm is the diameter of the cylindrical part of the barrier (freeboard). At the cylindrical barriers the freeboard and the barrier deflector are two separate parts, contrary to the vertical barriers. The total height of the barrier consists of freeboard + barrier deflector, e.g. freeboard 20 cm + deflector 35 cm = total height 55 cm.
The barriers are intended for applications where a highly buoyancy reserve is required. If there are under water flows the barrier is not allowed to overturn.
The efficiency of a barrier device depends on how perfectly the barrier can adapt itself to the wave movements. This must be ensured by sufficient freedom of movement of the barrier segments between each other and by sufficiently high buoyancy reserve. (Buoyancy reserve = how many kilograms can be hanged on the barrier before it sinks under water). If the barriers are used for keeping back waste or rubbish, a high buoyancy reserve is needed, since the waste (e.g. pieces of wood) are collecting in front of the deflector and may cause the barrier to sink. Generally it can be stated, the longer the barrier deflector, the larger the diameter of the freeboard.
BO-, BO-20 ASTM-, BO-35 ASTM-, AR-Series
Because of the barrier deflector, which can be designed shorter or longer, depending on use (besides BO-20 ASTM and BO-35 ASTM), cylindrical barriers can be better used in flowing waters, shallow waters and first of all in areas with flat stream banks. The vertical barriers (e.g. the AR-70 and AR-85) should be preferred, if there is a steep bank or if the water is running deep immediately (separation from beaches, harbors, docks, etc.).
Because of the barrier deflector, which can be designed shorter or longer, depending on use (besides BO-20 ASTM and BO-35 ASTM), cylindrical barriers can be better used in flowing waters, shallow waters and first of all in areas with flat stream banks. The vertical barriers (e.g. the AR-70 and AR-85) should be preferred, if there is a steep bank or if the water is running deep immediately (separation from beaches, harbors, docks, etc.).
Special Designs / Accessories
All barriers (besides BO-20 ASTM and BO-35 ASTM) can be specially designed – depending on application and operational requirement. However the manufacturing process is essentially more extensive at the vertical barriers than for the horizontal barriers.
Accessories, such as mounting brackets, storage bags, etc. are available on request.
All barriers (besides BO-20 ASTM and BO-35 ASTM) can be specially designed – depending on application and operational requirement. However the manufacturing process is essentially more extensive at the vertical barriers than for the horizontal barriers.
Accessories, such as mounting brackets, storage bags, etc. are available on request.
