Improvement of preventive hearth protection at a tank farm

Tank farms are used for the storage of extremely flammable and explosive substances; Consequently, preventive fireplace safety is of main significance. When rehabilitation of such a tank farm is deliberate, contractors usually suggest in depth – and thus expensive – measures. A fire-protection answer developed by TÜV SÜD demonstrates that an equal stage of security can also be reached with a much more cost-effective resolution. A central function in damage limitation is performed by early hearth detection using thermographic cameras.
Numerous tank farms throughout Germany store petrol, diesel, kerosene or liquefied petroleum gas (LPG). In contact with air, these highly flammable substances can kind explosive mixtures. Given this, tank farms require special measures in the field of preventive fire safety. If rehabilitation of fire-protection systems becomes essential at an older tank farm, far-reaching measures should be taken, not only by the use of precaution but in addition to exclude potential liability risks. And but not every measure that’s technologically possible is also necessary 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 need of rehabilitation covers 24 tanks with a storage quantity 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 levels Celsius, as outlined within the German hazardous substances legislation. In fireplace inspections and on-site inspections after incidents, the inspectors had recognized main non-conformities in the fire-extinguishing system. To replace the outdated and non-conforming system, an engineering agency submitted an in depth listing of measures. These measures fully happy all regulatory necessities but represented a really cost-intensive solution, requiring a full rehabilitation using traditional extinguishing techniques. For the tank-farm working firm, the prices of implementing these measures would have added up to 1.7 million euros.
In fireplace safety, the problem lies in connecting well-founded technological knowledge and legal know-how. In follow this implies harmonising affordable engineering companies and legal functions to obtain a cohesive, economically possible and simply implemented fire-protection idea.
ความหมายของเครื่องวัดความดัน developed by TÜV SÜD
At the operating company’s request, TÜV SÜD’s third-party consultants validated the person measures and the cost-effectiveness of the rehabilitation plan submitted by the engineering firm. Owing to the massive number of deficiencies identified within the tank farm, the specialists first ready a list of priorities with the measures necessary to fulfil the safety requirements and achieve the safety goals. They arrived at the conclusion that not the entire proposed measures actually needed to be implemented. Starting from this discovering, they then drew up another fire-protection idea that may in the end cut back the projected costs 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 complete foaming-agent provide of 10,500 litres distributed across two tanks, two submerged pumps within the port basin with a pump capability of one hundred eighty m3 per hour to ensure water provide for fire fighting and sprinkling the shells and the roofs of the tanks, guide triggering of the shut-off valves and a transformer station powered by the regional vitality supplier. The feed-in of emergency power was effected by the native professional fireplace division.
The engineering agency, against this, had planned to replace the whole fire-extinguishing system. They needed to put in three cellular extinguishing-agent distribution methods in container kind for distant managed sprinkling and foaming of the tanks. เพรสเชอร์เกจวัดแรงดันน้ำ would have required the installation of recent electrical, operational and control systems as well as new pipe routes connecting the extinguishing-agent distribution techniques with the fire-fighting techniques in the tank fields. The prices for the three extinguishing-agent distribution systems in container kind alone would have added as much as around 1.2 million euros.
Incipient hearth combating situation with intact power supply and free entry to the tank farm.
Implementation of three packages of measures
The alternative rehabilitation idea developed by TÜV SÜD, which also met the requirements of the Bavarian Building Code (BayBo [1]), provided for 3 important packages of measures to realize the protection and security aims.
First, set up of a fully automatic 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 models. They detect modifications in temperature at the surfaces of the tanks made of different supplies and located within the space monitored by the cameras, before these changes in temperature could cause a fire. As the cameras can transfer, the areas to be monitored can be divided into sectors. The cameras then method these sectors cyclically in sequence. To defend the cameras against external influences, they are housed in ventilated and heated weatherproof enclosures (Fig. 1). Monitoring focuses totally on the safety units of the tanks, pumps and motors and on the filling methods on the tank-farm premises. The management room on the tank farm and the native professional hearth division are notified immediately as soon because the temperature exceeds a sure limit. The measure package deal also contains distant triggering of the extinguishing-agent provide from the management centre and automation of the protection gadgets.
Incipient fireplace combating scenario with power loss the place entry to the tank farm is blocked by a cargo practice.
In addition, it covers rehabilitation of the sprinkler and foam-extinguisher system. In this context, TÜV SÜD’s answer supplied for replacement of the leaking and corroded pipe sections with new pipes and for set up of three mounted foam-extinguishing systems in the type of foam screens to fight incipient fires immediately. In addition, a mobile foam monitor was deliberate as a backup.
A third focus space concerns safeguarding the ability supply required for early fireplace detection and fireplace combating. According to the regional vitality supplier, power outages could have a duration of at least 30 minutes. Given this, the tank-farm needed an impartial energy provide system that was in a position to ensure power supply for no much less than 2 hours. The specialists relied on battery buffering and a diesel operated emergency energy unit to resolve this drawback.
Fire protection should ensure achievement of the protection goals
Protection aims and equivalent security level reached
The fire-protection resolution introduced by TÜV SÜD was agreed with each the tank farm’s working company, the municipal authority and the skilled fire division. The three measure packages also complied with the required safety goals and the security ranges. And ultimately, they proved far more cost-effective than the solution initially proposed. Since rehabilitation of the tank farm, early hearth detection in conjunction with improved fire-protection infrastructure has turn out to be a central a half of harm limitation. Since the rehabilitation idea was carried out, the tank-farm’s operating company – working with the professional hearth division – has been able to successfully counteract all possible scenarios of incipient hearth effectively and at an early stage, even in instances of energy loss or when entry to the tank farm is blocked (see Figures 2 and 3).
For extra 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 type and use (special structures). Their operation involves the handling and storing of extremely explosive or flammable substances. Protection measures and safety precautions thus not solely fall throughout the operating company’s duty however are additionally a matter of public curiosity. Given this, the BayBO stipulates necessities together with materials necessities which, as “General clauses of fire protection”, assist to support the safety objectives outlined in Article 12. However, in accordance with article three (1) deviations from the technical building laws are potential if another solution is found that is equivalent in phrases of fulfilling the final requirements in paragraph 1. In other phrases, the requirements laid down within the Building Code are deemed complied with if the generally recognised guidelines of architecture and technology are fulfilled.
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