Improvement of preventive hearth safety at a tank farm

Tank farms are used for the storage of extremely flammable and explosive substances; Consequently, preventive fireplace protection is of major significance. When rehabilitation of such a tank farm is planned, contractors often recommend extensive – and thus pricey – measures. A fire-protection resolution developed by TÜV SÜD demonstrates that an equivalent degree of safety can also be reached with a a lot more cost-effective resolution. A central position in damage limitation is performed by early fireplace detection utilizing thermographic cameras.
Numerous tank farms all through Germany store petrol, diesel, kerosene or liquefied petroleum fuel (LPG). In contact with air, these highly flammable substances can form explosive mixtures. Given this, tank farms require special measures within the field of preventive fireplace protection. If rehabilitation of fire-protection techniques becomes necessary at an older tank farm, far-reaching measures should be taken, not only by method of precaution but additionally to exclude potential legal responsibility risks. And but not every measure that is technologically feasible can be needed 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 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 extremely flammable fluids with flame factors of < 21 levels Celsius, as outlined within the German hazardous substances laws. In fireplace inspections and on-site inspections after incidents, the inspectors had recognized major non-conformities within the fire-extinguishing system. To substitute the outdated and non-conforming system, an engineering firm submitted an intensive record of measures. These measures totally happy all regulatory necessities but represented a really cost-intensive solution, requiring a full rehabilitation using conventional extinguishing systems. For the tank-farm working firm, the prices of implementing these measures would have added as much as 1.7 million euros.
In hearth safety, the challenge lies in connecting well-founded technological knowledge and authorized know-how. In apply this implies harmonising affordable engineering companies and authorized purposes to obtain a cohesive, economically possible and easily applied fire-protection concept.
Alternative answer developed by TÜV SÜD
At the operating 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 agency. Owing to the big variety of deficiencies identified in the tank farm, the specialists first ready a list of priorities with the measures essential to fulfil the security requirements and obtain the safety goals. They arrived on the conclusion that not the entire proposed measures actually wanted to be implemented. Starting from this finding, they then drew up another fire-protection concept that would ultimately scale back the projected costs 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 total foaming-agent supply of 10,500 litres distributed throughout two tanks, two submerged pumps in the port basin with a pump capability of 180 m3 per hour to ensure water provide for hearth 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 vitality provider. The feed-in of emergency energy was effected by the native professional fire division.
The engineering firm, against this, had deliberate to exchange the whole fire-extinguishing system. They wanted to put in three mobile extinguishing-agent distribution techniques in container form for remote managed sprinkling and foaming of the tanks. This resolution would have required the installation of new electrical, operational and management methods in addition to new pipe routes connecting the extinguishing-agent distribution methods with the fire-fighting techniques within the tank fields. The costs for the three extinguishing-agent distribution methods in container form alone would have added as much as around 1.2 million euros.
Incipient fireplace fighting state of affairs with intact energy provide and free entry to the tank farm.
Implementation of three packages of measures
The various rehabilitation concept developed by TÜV SÜD, which additionally met the requirements of the Bavarian Building Code (BayBo [1]), supplied for 3 important packages of measures to attain the safety and safety objectives.
First, set up of a fully automatic infrared measuring system made by DIAS Infrared to ensure early fire detection. The system’s seven thermographic cameras are put in on pan-tilt models. They detect changes in temperature on the surfaces of the tanks made of various supplies and situated within the area monitored by the cameras, before these modifications in temperature can 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 in opposition to exterior influences, they’re housed in ventilated and heated weatherproof enclosures (Fig. 1). Monitoring focuses primarily on the protection devices of the tanks, pumps and motors and on the filling techniques on the tank-farm premises. The management room at the tank farm and the native professional fireplace department are notified instantly as quickly because the temperature exceeds a sure restrict. The measure package deal additionally contains remote triggering of the extinguishing-agent provide from the control centre and automation of the protection devices.
Incipient fire preventing situation with power 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 provided for replacement of the leaking and corroded pipe sections with new pipes and for installation of three fixed foam-extinguishing techniques in the form of foam screens to struggle incipient fires directly. In nuova fima pressure gauge ราคา , a cellular foam monitor was deliberate as a backup.
A third focus space considerations safeguarding the facility provide required for early hearth detection and fire preventing. According to the regional vitality supplier, power outages might have a duration of at least half-hour. Given เครื่องมือตรวจวัดความดันเลือดเรียกว่า , the tank-farm needed an impartial energy provide system that was ready to ensure energy provide for at least 2 hours. The specialists relied on battery buffering and a diesel operated emergency power unit to unravel this problem.
Fire safety should ensure achievement of the safety objectives
Protection goals and equal security level reached
The fire-protection answer offered by TÜV SÜD was agreed with each the tank farm’s operating company, the municipal authority and the skilled fireplace department. The three measure packages also complied with the required protection aims and the safety levels. And ultimately, 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 become a central a half of damage limitation. Since the rehabilitation concept was implemented, the tank-farm’s working company – working with the professional hearth division – has been capable of effectively counteract all possible scenarios of incipient hearth effectively and at an early stage, even in circumstances of energy loss or when access 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 under the Bavarian Building Code (Bayerische Bauordnung, BayBo)
Tank farms are installations of a particular sort and use (special structures). Their operation entails the dealing with and storing of highly explosive or flammable substances. Protection measures and security precautions thus not only fall within the working company’s duty however are also a matter of public interest. Given this, the BayBO stipulates requirements including material necessities which, as “General clauses of fireplace protection”, help to help the protection goals defined in Article 12. However, based on article three (1) deviations from the technical building laws are potential if another answer is discovered that’s equal in terms of fulfilling the overall requirements in paragraph 1. In other phrases, the requirements laid down in the Building Code are deemed complied with if the widely recognised rules of architecture and know-how are fulfilled.
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