Improvement of preventive fire protection at a tank farm

Tank farms are used for the storage of highly flammable and explosive substances; Consequently, preventive hearth protection is of major importance. When rehabilitation of such a tank farm is planned, contractors usually recommend extensive – and thus pricey – measures. A fire-protection answer developed by TÜV SÜD demonstrates that an equal stage of security may also be reached with a a lot more cost-effective answer. pressure gauge octa in injury limitation is performed by early hearth detection utilizing thermographic cameras.
Numerous tank farms throughout Germany store petrol, diesel, kerosene or liquefied petroleum gas (LPG). In pressure gauge 10 bar with air, these highly flammable substances can type explosive mixtures. Given this, tank farms require particular measures within the field of preventive fireplace safety. If rehabilitation of fire-protection methods becomes essential at an older tank farm, far-reaching measures ought to be taken, not solely by means of precaution but also to exclude possible liability dangers. And but not each measure that’s technologically feasible can also be essential in case of a rehabilitation, as may 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 part of the tank farm in want of rehabilitation covers 24 tanks with a storage volume of between 600 and a pair of,000 cubic metres. The tank farm is used for intermediate storage of highly flammable fluids with flame factors 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 within the fire-extinguishing system. To exchange the outdated and non-conforming system, an engineering firm submitted an intensive record of measures. These measures fully happy all regulatory necessities however represented a very cost-intensive solution, requiring a full rehabilitation utilizing conventional extinguishing techniques. For the tank-farm working firm, the costs of implementing these measures would have added as a lot as 1.7 million euros.
In fire protection, the challenge lies in connecting well-founded technological information and legal know-how. In follow this implies harmonising reasonable engineering services and authorized functions to acquire a cohesive, economically feasible and easily applied fire-protection idea.
Alternative resolution 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 massive number of deficiencies identified in the tank farm, the experts first ready a list of priorities with the measures essential to fulfil the security requirements and obtain the safety aims. They arrived on the conclusion that not all the proposed measures actually needed to be applied. Starting from this finding, they then drew up an alternative fire-protection concept that might finally 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 complete foaming-agent supply of 10,500 litres distributed across two tanks, two submerged pumps in the port basin with a pump capacity of 180 m3 per hour to make sure water provide for fireplace preventing 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 vitality provider. The feed-in of emergency power was effected by the local skilled fireplace division.
The engineering agency, by contrast, had deliberate to replace the whole fire-extinguishing system. They wished to install three cell extinguishing-agent distribution techniques in container type for remote managed sprinkling and foaming of the tanks. This solution would have required the set up of latest electrical, operational and control techniques as nicely as new pipe routes connecting the extinguishing-agent distribution systems with the fire-fighting techniques in the tank fields. The prices for the three extinguishing-agent distribution systems in container form 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 different rehabilitation idea developed by TÜV SÜD, which also met the necessities of the Bavarian Building Code (BayBo [1]), provided for three essential packages of measures to realize the protection and security aims.
First, installation of a fully computerized infrared measuring system made by DIAS Infrared to make sure early fireplace detection. The system’s seven thermographic cameras are installed on pan-tilt items. They detect changes in temperature at the surfaces of the tanks made of various supplies and positioned 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 may be divided into sectors. The cameras then strategy 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 safety 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 division are notified immediately as quickly because the temperature exceeds a certain limit. The measure package deal additionally contains remote triggering of the extinguishing-agent provide from the management centre and automation of the safety gadgets.
Incipient fire combating state of affairs with energy loss where access to the tank farm is blocked by a cargo prepare.
In addition, it covers rehabilitation of the sprinkler and foam-extinguisher system. In this context, TÜV SÜD’s resolution supplied for alternative of the leaking and corroded pipe sections with new pipes and for installation of three fastened foam-extinguishing techniques within the type of foam displays to struggle incipient fires immediately. In addition, a cellular foam monitor was planned as a backup.
A third focus area concerns safeguarding the facility supply required for early hearth detection and hearth combating. According to the regional power supplier, power outages could have a period of at least 30 minutes. Given this, the tank-farm needed an independent power supply system that was in a position to ensure energy provide for a minimal of 2 hours. The consultants relied on battery buffering and a diesel operated emergency power unit to resolve this drawback.
Fire protection should guarantee achievement of the protection goals

Protection objectives and equivalent safety degree reached

The fire-protection solution offered by TÜV SÜD was agreed with each the tank farm’s operating company, the municipal authority and the professional fireplace department. The three measure packages additionally complied with the required protection goals and the security ranges. And ultimately, they proved far cheaper than the answer initially proposed. Since rehabilitation of the tank farm, early fire detection along side improved fire-protection infrastructure has turn out to be a central part of harm limitation. Since the rehabilitation idea was applied, the tank-farm’s operating firm – working with the skilled fireplace division – has been capable of successfully counteract all potential situations 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).
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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 dealing with and storing of extremely explosive or flammable substances. Protection measures and security precautions thus not only fall throughout the working company’s responsibility but are additionally a matter of public interest. Given this, the BayBO stipulates necessities including materials necessities which, as “General clauses of fire protection”, help to assist the protection goals outlined in Article 12. However, according to article 3 (1) deviations from the technical building rules are possible if an alternate answer is found that’s equal when it comes to fulfilling the general necessities in paragraph 1. In other words, the requirements laid down within the Building Code are deemed complied with if the commonly recognised guidelines of structure and know-how are fulfilled.

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