Tank farms are used for the storage of extremely flammable and explosive substances; Consequently, preventive fire protection is of major importance. When rehabilitation of such a tank farm is planned, contractors typically advocate intensive – and thus expensive – measures. A fire-protection resolution developed by TÜV SÜD demonstrates that an equal stage of security can be reached with a a lot more cost-effective solution. A central function in harm limitation is played by early fireplace detection utilizing thermographic cameras.
Numerous tank farms all through Germany retailer petrol, diesel, kerosene or liquefied petroleum gas (LPG). In contact with air, these extremely flammable substances can form explosive mixtures. Given this, tank farms require particular measures within the field of preventive fireplace protection. If rehabilitation of fire-protection methods becomes needed at an older tank farm, far-reaching measures must be taken, not only by means of precaution but additionally to exclude potential legal responsibility risks. And but not each measure that is technologically feasible 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 a half 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 levels Celsius, as outlined in the German hazardous substances laws. In hearth 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 To replace the outdated and non-conforming system, an engineering agency submitted an intensive list of measures. These measures fully glad all regulatory requirements however represented a very cost-intensive answer, requiring a full rehabilitation utilizing conventional extinguishing systems. For เกจแรงดันสูง -farm working firm, the prices of implementing these measures would have added as much as 1.7 million euros.
In fireplace protection, the challenge lies in connecting well-founded technological knowledge and legal know-how. In practice this implies harmonising affordable engineering services and authorized functions to obtain a cohesive, economically possible and easily applied fire-protection idea.
Alternative answer developed by TÜV SÜD
At the working company’s request, TÜV SÜD’s third-party specialists validated the individual measures and the cost-effectiveness of the rehabilitation plan submitted by the engineering firm. Owing to the large variety of deficiencies identified in the tank farm, the specialists first ready a list of priorities with the measures necessary to fulfil the protection requirements and achieve the protection aims. They arrived on the conclusion that not the entire proposed measures actually wanted to be implemented. Starting from this finding, they then drew up an alternate fire-protection idea that may ultimately cut back the projected prices by one third.
TÜV SÜD’s rehabilitation plan included the fire-protection infrastructure already in place on the tank farm, similar to a non-automatic foam extinguishing system with a total foaming-agent provide of 10,500 litres distributed across 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, handbook triggering of the shut-off valves and a transformer station powered by the regional power provider. The feed-in of emergency power was effected by the native professional hearth department.
The engineering firm, against this, had planned to replace the entire fire-extinguishing system. They needed to install three mobile extinguishing-agent distribution techniques in container form for distant managed sprinkling and foaming of the tanks. This answer would have required the set up of latest electrical, operational and management methods as well as new pipe routes connecting the extinguishing-agent distribution systems with the fire-fighting systems within the tank fields. The prices for the three extinguishing-agent distribution methods in container kind alone would have added as much as around 1.2 million euros.
Incipient fireplace fighting situation with intact power provide and free access 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 essential packages of measures to realize the safety and safety objectives.
First, set up of a totally computerized infrared measuring system made by DIAS Infrared to ensure early fireplace detection. The system’s seven thermographic cameras are put in on pan-tilt items. They detect modifications in temperature on the surfaces of the tanks made of various supplies and located within the area monitored by the cameras, before these changes in temperature can cause a hearth. As the cameras can transfer, the areas to be monitored may be divided into sectors. The cameras then strategy these sectors cyclically in sequence. To protect the cameras in opposition to external influences, they’re housed in ventilated and heated weatherproof enclosures (Fig. 1). Monitoring focuses primarily on the protection gadgets 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 skilled hearth department are notified instantly as soon because the temperature exceeds a sure restrict. The measure bundle also includes remote triggering of the extinguishing-agent provide from the control centre and automation of the security gadgets.
Incipient hearth preventing scenario with power loss where 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 resolution offered for substitute of the leaking and corroded pipe sections with new pipes and for set up of three mounted foam-extinguishing systems in the form of foam monitors to fight incipient fires instantly. In addition, a mobile foam monitor was planned as a backup.
A third focus area considerations safeguarding the facility supply required for early fireplace detection and fireplace preventing. According to the regional vitality provider, power outages may have a duration of a minimal of 30 minutes. Given this, the tank-farm needed an impartial power provide system that was ready to ensure power supply for no less than 2 hours. The consultants relied on battery buffering and a diesel operated emergency energy unit to unravel this drawback.
Fire protection should ensure achievement of the safety goals
Protection objectives and equivalent safety level reached
The fire-protection answer offered by TÜV SÜD was agreed with both the tank farm’s working company, the municipal authority and the skilled fire department. The three measure packages additionally complied with the required protection aims and the security ranges. And in the end, they proved far cheaper than the answer initially proposed. Since rehabilitation of the tank farm, early hearth detection at the facet of improved fire-protection infrastructure has turn out to be a central a part of harm limitation. Since the rehabilitation idea was applied, the tank-farm’s operating company – working with the professional fire division – has been capable of successfully counteract all attainable scenarios 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 information, go to www.tuev-sued.de/is or www.dias-infrared.de
Classification under the Bavarian Building Code (Bayerische Bauordnung, BayBo)
Tank farms are installations of a special sort and use (special structures). Their operation includes the dealing with and storing of extremely explosive or flammable substances. Protection measures and security precautions thus not solely fall inside the operating company’s duty however are also a matter of public curiosity. Given this, the BayBO stipulates requirements including material requirements which, as “General clauses of fire protection”, assist to assist the safety goals outlined in Article 12. However, according to article three (1) deviations from the technical building rules are potential if an alternative solution is discovered that’s equivalent when it comes to fulfilling the general requirements in paragraph 1. In different phrases, the necessities laid down in the Building Code are deemed complied with if the commonly recognised guidelines of structure and technology are fulfilled.
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