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Tank farms are used for the storage of highly flammable and explosive substances; Consequently, preventive hearth safety is of major importance. When rehabilitation of such a tank farm is deliberate, contractors usually recommend in depth – and thus expensive – measures. A fire-protection resolution developed by TÜV SÜD demonstrates that an equivalent stage of security can be reached with a far more cost-effective resolution. A central position in injury limitation is played by early fire detection using thermographic cameras.
Numerous tank farms all through Germany store petrol, diesel, kerosene or liquefied petroleum fuel (LPG). In contact with air, these extremely flammable substances can form explosive mixtures. Given this, tank farms require particular measures within the area of preventive hearth safety. If rehabilitation of fire-protection systems turns into needed at an older tank farm, far-reaching measures ought to be taken, not only by method of precaution but also to exclude possible legal responsibility dangers. And but not each measure that is technologically feasible can also be needed in case of a rehabilitation, as can be seen from the instance of a tank farm in Bavaria, Germany.
The tank farm is located at a basin of a river port in Bavaria. The part of the tank farm in want of rehabilitation covers 24 tanks with a storage quantity of between 600 and a pair of,000 cubic metres. The tank farm is used for intermediate storage of highly flammable fluids with flame points of < 21 degrees Celsius, as outlined in the German hazardous substances legislation. In hearth inspections and on-site inspections after incidents, the inspectors had identified major non-conformities within the fire-extinguishing system. To replace the outdated and non-conforming system, an engineering firm submitted an extensive listing of measures. These measures absolutely satisfied all regulatory requirements however represented a very cost-intensive answer, requiring a full rehabilitation using traditional extinguishing methods. For the tank-farm working company, 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 data and authorized know-how. In practice this implies harmonising affordable engineering services and legal functions to acquire a cohesive, economically feasible and simply carried out fire-protection concept.
Alternative resolution developed by TÜV SÜD
At the operating 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 recognized in the tank farm, the consultants first ready a listing of priorities with the measures necessary to fulfil the protection necessities and achieve the protection goals. They arrived at the conclusion that not all of the proposed measures really wanted to be carried out. Starting from this finding, they then drew up an alternative fire-protection idea that may finally cut back the projected prices by one third.
TÜV SÜD’s rehabilitation plan included the fire-protection infrastructure already in place at the tank farm, corresponding to a non-automatic foam extinguishing system with a complete foaming-agent provide of 10,500 litres distributed throughout two tanks, two submerged pumps in the port basin with a pump capability of 180 m3 per hour to ensure water supply for hearth fighting and sprinkling the shells and the roofs of the tanks, manual triggering of the shut-off valves and a transformer station powered by the regional energy provider. The feed-in of emergency power was effected by the native professional hearth division.
The engineering firm, against this, had deliberate to replace the entire fire-extinguishing system. They wanted to put in three mobile extinguishing-agent distribution techniques in container type for distant managed sprinkling and foaming of the tanks. This solution would have required the set up of latest electrical, operational and control systems in addition to new pipe routes connecting the extinguishing-agent distribution methods with the fire-fighting techniques within the tank fields. The costs for the three extinguishing-agent distribution methods in container kind alone would have added as much as around 1.2 million euros.
Incipient fire fighting state of affairs with intact power provide and free access to the tank farm.
Implementation of three packages of measures
The various rehabilitation idea developed by TÜV SÜD, which also met the necessities of the Bavarian Building Code (BayBo [1]), provided for 3 important packages of measures to realize the safety and safety aims.
First, installation of a completely automated infrared measuring system made by DIAS Infrared to ensure early fireplace detection. The system’s seven thermographic cameras are installed on pan-tilt units. They detect changes in temperature on the surfaces of the tanks made of various materials and situated in the space monitored by the cameras, before these adjustments in temperature may cause a fireplace. As the cameras can transfer, the areas to be monitored could be divided into sectors. The cameras then strategy these sectors cyclically in sequence. To protect the cameras against external influences, they are housed in ventilated and heated weatherproof enclosures (Fig. 1). Monitoring focuses primarily on the security devices of the tanks, pumps and motors and on the filling systems on the tank-farm premises. The control room at the tank farm and the native professional fire division are notified immediately as quickly because the temperature exceeds a sure limit. The measure package also contains distant triggering of the extinguishing-agent provide from the management centre and automation of the security devices.
Incipient fire combating state of affairs with energy loss the place entry to the tank farm is blocked by a cargo prepare.
In addition, it covers rehabilitation of the sprinkler and foam-extinguisher system. In เกจวัดแรงดันถังแก๊ส , TÜV SÜD’s answer provided for substitute of the leaking and corroded pipe sections with new pipes and for installation of three fastened foam-extinguishing methods within the form of foam monitors to struggle incipient fires immediately. In addition, a cellular foam monitor was planned as a backup.
A third focus area issues safeguarding the power provide required for early hearth detection and hearth fighting. According to the regional energy supplier, energy outages may have a length of at least 30 minutes. Given this, the tank-farm wanted an impartial power provide system that was in a position to make sure power supply for a minimum of 2 hours. The experts relied on battery buffering and a diesel operated emergency energy unit to resolve this drawback.
Fire safety must ensure achievement of the protection objectives
Protection aims and equivalent security stage reached
The fire-protection solution presented by TÜV SÜD was agreed with both the tank farm’s working firm, the municipal authority and the professional hearth department. The three measure packages additionally complied with the required protection goals and the protection ranges. And in เกจวัดแรงดัน4นิ้วราคา , they proved far more cost-effective than the answer initially proposed. Since rehabilitation of the tank farm, early fire detection at the side of improved fire-protection infrastructure has turn into a central part of damage limitation. Since the rehabilitation concept was carried out, the tank-farm’s working firm – working with the professional hearth department – has been able to successfully counteract all potential eventualities of incipient hearth successfully and at an early stage, even in instances of power loss or when access to the tank farm is blocked (see Figures 2 and 3).
For more data, go to www.tuev-sued.de/is or www.dias-infrared.de
Classification underneath the Bavarian Building Code (Bayerische Bauordnung, BayBo)
Tank farms are installations of a particular kind and use (special structures). Their operation entails the handling and storing of highly explosive or flammable substances. Protection measures and safety precautions thus not solely fall throughout the working company’s accountability however are additionally a matter of public curiosity. Given this, the BayBO stipulates necessities together with material requirements which, as “General clauses of fire protection”, assist to help the protection objectives defined in Article 12. However, in accordance with article three (1) deviations from the technical constructing laws are possible if an alternative solution is found that’s equivalent in terms of fulfilling the overall necessities in paragraph 1. In different phrases, the necessities laid down in the Building Code are deemed complied with if the generally recognised rules of structure and expertise are fulfilled.
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