Improvement of preventive fireplace safety at a tank farm

Tank farms are used for the storage of extremely flammable and explosive substances; Consequently, preventive fireplace safety is of major importance. When rehabilitation of such a tank farm is planned, contractors usually advocate extensive – and thus pricey – measures. A fire-protection answer developed by TÜV SÜD demonstrates that an equal level of safety can also be reached with a much more cost-effective answer. A central function in injury limitation is performed by early fireplace detection utilizing thermographic cameras.
Numerous tank farms all through Germany store petrol, diesel, kerosene or liquefied petroleum gasoline (LPG). In contact with air, these extremely flammable substances can kind explosive mixtures. Given this, tank farms require particular measures within the subject of preventive hearth protection. If เกรดวัดแรงดัน of fire-protection techniques turns into needed at an older tank farm, far-reaching measures should be taken, not only by means of precaution but also to exclude attainable liability dangers. And yet not each measure that’s technologically feasible can additionally be essential in case of a rehabilitation, as can be seen from the instance of a tank farm in Bavaria, Germany.
The tank farm is positioned at a basin of a river port in Bavaria. The part of the tank farm in need of rehabilitation covers 24 tanks with a storage volume of between 600 and 2,000 cubic metres. The tank farm is used for intermediate storage of highly flammable fluids with flame points of < 21 degrees Celsius, as outlined within the German hazardous substances legislation. In hearth inspections and on-site inspections after incidents, the inspectors had recognized major non-conformities in the fire-extinguishing system. To exchange the outdated and non-conforming system, an engineering firm submitted an intensive listing of measures. These measures fully satisfied all regulatory requirements but represented a really cost-intensive answer, requiring a full rehabilitation using traditional extinguishing techniques. For the tank-farm operating firm, the costs of implementing these measures would have added up to 1.7 million euros.
In hearth safety, the problem lies in connecting well-founded technological knowledge and legal know-how. In practice this implies harmonising affordable engineering services and authorized purposes to acquire a cohesive, economically possible and easily applied fire-protection idea.
Alternative solution developed by TÜV SÜD
At the working company’s request, TÜV SÜD’s third-party experts validated the person measures and the cost-effectiveness of the rehabilitation plan submitted by the engineering firm. Owing to the large number of deficiencies identified in the tank farm, the experts first ready a listing of priorities with the measures necessary to fulfil the safety necessities and obtain the safety objectives. They arrived at the conclusion that not all of the proposed measures actually needed to be implemented. Starting from this finding, they then drew up an alternative fire-protection idea that might ultimately reduce the projected prices by one third.
TÜV SÜD’s rehabilitation plan included the fire-protection infrastructure already in place on the tank farm, such as a non-automatic foam extinguishing system with a total foaming-agent provide of 10,500 litres distributed throughout two tanks, two submerged pumps within the port basin with a pump capacity of one hundred eighty m3 per hour to ensure water provide for hearth fighting and sprinkling the shells and the roofs of the tanks, handbook triggering of the shut-off valves and a transformer station powered by the regional energy supplier. The feed-in of emergency energy was effected by the native skilled fire department.
The engineering firm, against this, had deliberate to replace the whole fire-extinguishing system. They wished to put in three cell extinguishing-agent distribution systems in container type for distant managed sprinkling and foaming of the tanks. This answer would have required the installation of latest electrical, operational and management systems as well as new pipe routes connecting the extinguishing-agent distribution techniques with the fire-fighting methods in the tank fields. The costs for the three extinguishing-agent distribution systems in container type alone would have added up to round 1.2 million euros.
Incipient fire fighting scenario with intact energy supply and free entry to the tank farm.
Implementation of three packages of measures
The alternative rehabilitation idea developed by TÜV SÜD, which additionally met the requirements of the Bavarian Building Code (BayBo [1]), supplied for three essential packages of measures to realize the safety and safety goals.
First, set up of a fully automated infrared measuring system made by DIAS Infrared to make sure early fire detection. The system’s seven thermographic cameras are put in on pan-tilt items. They detect adjustments in temperature at the surfaces of the tanks made of various supplies and located within the area monitored by the cameras, before these modifications in temperature could cause a fireplace. As the cameras can move, the areas to be monitored may be divided into sectors. The cameras then method these sectors cyclically in sequence. To shield the cameras towards external influences, they are housed in ventilated and heated weatherproof enclosures (Fig. 1). Monitoring focuses totally on the protection units of the tanks, pumps and motors and on the filling techniques on the tank-farm premises. The management room on the tank farm and the native skilled fireplace department are notified instantly as soon because the temperature exceeds a sure limit. The measure package additionally contains distant triggering of the extinguishing-agent supply from the control centre and automation of the protection devices.
Incipient fireplace combating state of affairs with power loss where entry to the tank farm is blocked by a cargo train.
In addition, it covers rehabilitation of the sprinkler and foam-extinguisher system. In this context, TÜV SÜD’s solution supplied for substitute of the leaking and corroded pipe sections with new pipes and for set up of three fastened foam-extinguishing techniques in the type of foam screens to battle incipient fires instantly. In addition, a cell foam monitor was deliberate as a backup.
A third focus area issues safeguarding the facility supply required for early hearth detection and fireplace combating. According to the regional energy provider, power outages could have a length of at least half-hour. Given this, the tank-farm wanted an impartial power supply system that was in a position to make sure energy provide for a minimum of 2 hours. The consultants relied on battery buffering and a diesel operated emergency energy unit to solve this drawback.
Fire protection should guarantee achievement of the protection goals
Protection aims and equivalent safety level reached
The fire-protection resolution introduced by TÜV SÜD was agreed with each the tank farm’s operating firm, the municipal authority and the skilled fireplace division. The three measure packages also complied with the required protection aims and the protection levels. And finally, they proved far more cost-effective than the answer initially proposed. Since rehabilitation of the tank farm, early fire detection in conjunction with improved fire-protection infrastructure has turn out to be a central a part of injury limitation. Since the rehabilitation idea was implemented, the tank-farm’s working company – working with the skilled fireplace department – has been capable of effectively counteract all potential eventualities of incipient fireplace effectively and at an early stage, even in cases of energy loss or when access to the tank farm is blocked (see Figures 2 and 3).
For more information, go to www.tuev-sued.de/is or www.dias-infrared.de
Classification beneath the Bavarian Building Code (Bayerische Bauordnung, BayBo)
Tank farms are installations of a particular type and use (special structures). Their operation involves the handling and storing of extremely explosive or flammable substances. Protection measures and security precautions thus not only fall inside the operating company’s duty but are additionally a matter of public curiosity. Given this, the BayBO stipulates necessities together with materials necessities which, as “General clauses of fireplace protection”, help to help the safety goals outlined in Article 12. However, based on article 3 (1) deviations from the technical building regulations are attainable if an alternate solution is found that’s equal when it comes to fulfilling the overall requirements in paragraph 1. In different phrases, the necessities laid down within the Building Code are deemed complied with if the widely recognised guidelines of architecture and know-how are fulfilled.
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