Improvement of preventive fireplace safety at a tank farm

Tank farms are used for the storage of extremely flammable and explosive substances; Consequently, preventive hearth protection is of main importance. When rehabilitation of such a tank farm is deliberate, contractors typically suggest extensive – and thus pricey – measures. A fire-protection solution developed by TÜV SÜD demonstrates that an equal level of safety can be reached with a a lot more cost-effective solution. A central role in damage limitation is performed by early fire detection utilizing thermographic cameras.
Numerous tank farms all through Germany retailer 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 hearth safety. If rehabilitation of fire-protection methods becomes essential at an older tank farm, far-reaching measures ought to be taken, not only by the use of precaution but in addition to exclude attainable liability dangers. And yet not each measure that is technologically possible can additionally be necessary in case of a rehabilitation, as could 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 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 points of < 21 degrees Celsius, as outlined within the German hazardous substances laws. In hearth inspections and on-site inspections after incidents, the inspectors had identified major non-conformities in the fire-extinguishing system. To replace the outdated and non-conforming system, an engineering agency submitted an extensive list of measures. These measures totally happy all regulatory necessities but represented a really cost-intensive answer, requiring a full rehabilitation using conventional extinguishing techniques. For the tank-farm working company, the prices of implementing these measures would have added as a lot as 1.7 million euros.
In เกจแรงดันลม , the problem lies in connecting well-founded technological knowledge and authorized know-how. In follow this means harmonising reasonable engineering services and legal purposes to acquire a cohesive, economically possible and easily implemented 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 agency. Owing to the massive number of deficiencies recognized within the tank farm, the consultants first prepared an inventory of priorities with the measures necessary to fulfil the safety requirements and obtain the safety objectives. They arrived on the conclusion that not all the proposed measures really wanted to be applied. 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, similar to 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 make sure water supply for hearth 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 energy provider. The feed-in of emergency energy was effected by the native skilled fire department.
เกจวัดความดันน้ำ engineering agency, against this, had planned to switch the whole fire-extinguishing system. They needed to install three cellular extinguishing-agent distribution techniques in container kind for remote controlled sprinkling and foaming of the tanks. This solution would have required the installation of new electrical, operational and control systems 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 up to around 1.2 million euros.
Incipient fireplace fighting state of affairs with intact power supply 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]), offered for 3 essential packages of measures to attain the safety and safety goals.
First, installation of a totally computerized infrared measuring system made by DIAS Infrared to ensure early fire detection. The system’s seven thermographic cameras are installed on pan-tilt items. They detect adjustments in temperature at the surfaces of the tanks made of different materials and located in the area monitored by the cameras, earlier than these changes in temperature could cause a fireplace. 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 shield the cameras in opposition to external influences, they’re housed in ventilated and heated weatherproof enclosures (Fig. 1). Monitoring focuses primarily on the protection units of the tanks, pumps and motors and on the filling systems on the tank-farm premises. The control room on the tank farm and the local skilled hearth division are notified instantly as quickly as the temperature exceeds a sure limit. The measure package additionally consists of remote triggering of the extinguishing-agent supply from the management centre and automation of the security devices.
Incipient fireplace fighting state of affairs with energy 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 offered for substitute of the leaking and corroded pipe sections with new pipes and for installation of three mounted foam-extinguishing techniques within the form of foam monitors to battle incipient fires immediately. In addition, a cell foam monitor was planned as a backup.
A third focus area concerns safeguarding the facility supply required for early fireplace detection and fireplace combating. According to the regional vitality supplier, energy outages might have a duration of at least half-hour. Given this, the tank-farm wanted an independent energy provide system that was able to make sure power provide for no less than 2 hours. The experts relied on battery buffering and a diesel operated emergency power unit to resolve this downside.
Fire safety must ensure achievement of the safety objectives
Protection aims and equivalent safety level reached
The fire-protection resolution offered by TÜV SÜD was agreed with each the tank farm’s operating company, the municipal authority and the skilled hearth division. The three measure packages also complied with the required protection goals and the safety levels. And finally, they proved far more cost-effective than the solution initially proposed. Since rehabilitation of the tank farm, early fire detection at the side of improved fire-protection infrastructure has become a central a part of injury limitation. Since the rehabilitation idea was implemented, the tank-farm’s working company – working with the professional hearth division – has been in a position to effectively counteract all potential situations of incipient hearth successfully 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 data, 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 dealing with and storing of extremely explosive or flammable substances. Protection measures and safety precautions thus not solely fall inside the working company’s accountability but are additionally a matter of public curiosity. Given this, the BayBO stipulates necessities including materials necessities which, as “General clauses of fireplace protection”, help to assist the safety goals outlined in Article 12. However, according to article three (1) deviations from the technical constructing rules are potential if an alternate resolution is found that is equivalent when it comes to fulfilling the overall requirements in paragraph 1. In different words, the requirements laid down in the Building Code are deemed complied with if the generally recognised guidelines of structure and technology are fulfilled.
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