Improvement of preventive hearth safety at a tank farm

Tank farms are used for the storage of highly flammable and explosive substances; Consequently, preventive fire protection is of main importance. When rehabilitation of such a tank farm is planned, contractors typically advocate extensive – and thus costly – measures. A fire-protection solution developed by TÜV SÜD demonstrates that an equal stage of security can be reached with a a lot more cost-effective resolution. A central function in damage limitation is played by early fire detection using thermographic cameras.
Numerous tank farms throughout Germany store petrol, diesel, kerosene or liquefied petroleum gasoline (LPG). In contact with air, these extremely flammable substances can kind explosive mixtures. Given this, tank farms require special measures within the subject of preventive fire protection. If rehabilitation of fire-protection methods turns into essential at an older tank farm, far-reaching measures should be taken, not only by means of precaution but also to exclude possible legal responsibility risks. And yet not every measure that’s technologically feasible can be necessary in case of a rehabilitation, as can be seen from the example 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 couple of,000 cubic metres. The tank farm is used for intermediate storage of highly flammable fluids with flame factors of < 21 degrees Celsius, as outlined in the German hazardous substances laws. In fireplace inspections and on-site inspections after incidents, the inspectors had recognized major non-conformities in the fire-extinguishing system. To replace the outdated and non-conforming system, an engineering firm submitted an extensive listing of measures. These measures totally satisfied all regulatory requirements however represented a very cost-intensive answer, requiring a full rehabilitation utilizing conventional extinguishing techniques. For the tank-farm operating firm, the costs of implementing these measures would have added up to 1.7 million euros.
In เกจวัดแรงดันน้ำไทวัสดุ , the problem lies in connecting well-founded technological knowledge and legal know-how. In follow this implies harmonising cheap engineering companies and authorized purposes to obtain a cohesive, economically possible and simply carried out fire-protection concept.
Alternative resolution developed by TÜV SÜD
At the working 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 big number of deficiencies identified in the tank farm, the consultants first prepared a listing of priorities with the measures necessary to fulfil the safety requirements and obtain the safety goals. They arrived on the conclusion that not all the proposed measures truly wanted to be implemented. Starting from this finding, they then drew up an alternate fire-protection concept that might finally reduce the projected prices by one third.
TÜV SÜD’s rehabilitation plan included the fire-protection infrastructure already in place on the tank farm, corresponding to a non-automatic foam extinguishing system with a complete foaming-agent provide of 10,500 litres distributed across two tanks, two submerged pumps in the port basin with a pump capacity of one hundred eighty m3 per hour to ensure water provide for fire combating 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 power provider. The feed-in of emergency power was effected by the native professional fire division.
The engineering agency, by contrast, had deliberate to exchange the entire fire-extinguishing system. They wanted to install three cell extinguishing-agent distribution methods in container type for distant controlled sprinkling and foaming of the tanks. This resolution would have required the set up of recent electrical, operational and management methods as nicely as new pipe routes connecting the extinguishing-agent distribution techniques with the fire-fighting systems in the tank fields. The costs for the three extinguishing-agent distribution techniques in container kind alone would have added as much as round 1.2 million euros.
Incipient fireplace combating situation with intact energy supply and free access to the tank farm.
Implementation of three packages of measures
The different rehabilitation concept developed by TÜV SÜD, which additionally met the necessities of the Bavarian Building Code (BayBo [1]), supplied for 3 essential packages of measures to attain the protection and security objectives.
First, set up of a totally automatic infrared measuring system made by DIAS Infrared to ensure early fireplace detection. The system’s seven thermographic cameras are put in on pan-tilt units. They detect adjustments in temperature at the surfaces of the tanks made of various supplies and located within the area monitored by the cameras, before these modifications in temperature may cause a fire. As the cameras can move, the areas to be monitored can be divided into sectors. The cameras then method these sectors cyclically in sequence. To defend the cameras towards external influences, they’re 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 techniques on the tank-farm premises. The control room at the tank farm and the local skilled fire department are notified instantly as quickly because the temperature exceeds a sure restrict. The measure bundle also contains distant triggering of the extinguishing-agent supply from the control centre and automation of the security gadgets.
Incipient fire fighting scenario 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 solution provided for substitute of the leaking and corroded pipe sections with new pipes and for set up of three mounted foam-extinguishing techniques in the form of foam monitors to battle incipient fires directly. In addition, a mobile foam monitor was planned as a backup.
A third focus space issues safeguarding the facility supply required for early fire detection and fireplace fighting. According to pressure gauge digital ราคา , energy outages might have a period of no much less than half-hour. Given this, the tank-farm needed an unbiased power provide system that was in a position to make sure energy provide for a minimum of 2 hours. The experts relied on battery buffering and a diesel operated emergency energy unit to resolve this downside.
Fire safety must ensure achievement of the safety objectives
Protection goals and equivalent safety degree reached
The fire-protection solution offered by TÜV SÜD was agreed with each the tank farm’s operating firm, the municipal authority and the professional hearth division. The three measure packages also complied with the required protection goals and the safety ranges. And finally, they proved far cheaper than the solution initially proposed. Since rehabilitation of the tank farm, early hearth detection in conjunction with improved fire-protection infrastructure has turn into a central part of injury limitation. Since the rehabilitation idea was applied, the tank-farm’s working firm – working with the professional fire department – has been in a position to successfully counteract all attainable eventualities of incipient fire effectively and at an early stage, even in instances of energy loss or when access to the tank farm is blocked (see Figures 2 and 3).
For extra info, 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 special sort 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 only fall throughout the working company’s accountability however are also a matter of public interest. Given this, the BayBO stipulates requirements together with material requirements which, as “General clauses of fire protection”, help to assist the protection objectives outlined in Article 12. However, in accordance with article three (1) deviations from the technical building rules are potential if an alternative solution is found that’s equal in terms of fulfilling the overall requirements in paragraph 1. In different phrases, the requirements laid down within the Building Code are deemed complied with if the widely recognised rules of architecture and expertise are fulfilled.
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