Tank farms are used for the storage of extremely flammable and explosive substances; Consequently, preventive fireplace safety is of main importance. When rehabilitation of such a tank farm is deliberate, contractors typically recommend in depth – and thus costly – measures. pressure gauge ราคา -protection resolution developed by TÜV SÜD demonstrates that an equal degree of security can additionally be reached with a far more cost-effective resolution. A central position in harm limitation is played by early fireplace detection using thermographic cameras.
Numerous tank farms all through Germany store petrol, diesel, kerosene or liquefied petroleum fuel (LPG). In contact with air, these extremely flammable substances can type explosive mixtures. Given this, tank farms require special measures within the field of preventive fire safety. If rehabilitation of fire-protection techniques turns into necessary at an older tank farm, far-reaching measures should be taken, not solely by means of precaution but in addition to exclude possible legal responsibility dangers. And yet not each measure that is technologically possible can also be needed in case of a rehabilitation, as can be seen from the example of a tank farm in Bavaria, Germany.
The tank farm is situated at a basin of a river port in Bavaria. The a part of the tank farm in need of rehabilitation covers 24 tanks with a storage quantity of between 600 and a couple of,000 cubic metres. The tank farm is used for intermediate storage of extremely flammable fluids with flame points of < 21 levels Celsius, as outlined in the German hazardous substances legislation. In hearth inspections and on-site inspections after incidents, the inspectors had recognized major non-conformities in the fire-extinguishing system. To exchange the outdated and non-conforming system, an engineering agency submitted an intensive record of measures. These measures fully satisfied all regulatory requirements but represented a really cost-intensive answer, requiring a full rehabilitation utilizing conventional extinguishing systems. For the tank-farm operating firm, the prices of implementing these measures would have added as a lot as 1.7 million euros.
In hearth safety, the problem lies in connecting well-founded technological data and authorized know-how. In practice this implies harmonising reasonable engineering services and authorized applications to acquire a cohesive, economically possible and simply 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 firm. Owing to the massive number of deficiencies recognized within the tank farm, the consultants first prepared a listing of priorities with the measures essential to fulfil the security necessities and achieve the safety objectives. They arrived on the conclusion that not all of the proposed measures really needed to be implemented. Starting from this discovering, they then drew up an alternative fire-protection idea that may finally reduce the projected costs by one third.
TÜV SÜD’s rehabilitation plan included the fire-protection infrastructure already in place at 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 capability of 180 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 energy supplier. The feed-in of emergency power was effected by the local skilled fire department.
The engineering agency, by contrast, had deliberate to replace the entire fire-extinguishing system. They wished to install three mobile extinguishing-agent distribution systems in container type for remote managed sprinkling and foaming of the tanks. This answer would have required the set up of new electrical, operational and control techniques as well as new pipe routes connecting the extinguishing-agent distribution systems with the fire-fighting methods within the tank fields. The costs for the three extinguishing-agent distribution methods in container form alone would have added as a lot as around 1.2 million euros.
Incipient fireplace combating state of affairs with intact energy supply 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 necessities of the Bavarian Building Code (BayBo [1]), offered for 3 important packages of measures to realize the safety and security objectives.
First, installation of a totally automatic infrared measuring system made by DIAS Infrared to ensure early fire detection. The system’s seven thermographic cameras are installed on pan-tilt models. They detect modifications in temperature at the surfaces of the tanks made of various supplies and situated in the area monitored by the cameras, earlier than 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 strategy these sectors cyclically in sequence. To defend the cameras in opposition to external influences, they’re housed in ventilated and heated weatherproof enclosures (Fig. 1). Monitoring focuses primarily on the safety units of the tanks, pumps and motors and on the filling methods on the tank-farm premises. The management room on the tank farm and the native skilled hearth department are notified instantly as soon because the temperature exceeds a sure limit. The measure package deal additionally contains distant triggering of the extinguishing-agent provide from the control centre and automation of the protection devices.
Incipient fireplace fighting scenario with energy loss where entry to the tank farm is blocked by a cargo train.
In addition, it covers rehabilitation of the sprinkler and foam-extinguisher system. In this context, TÜV SÜD’s resolution provided for alternative of the leaking and corroded pipe sections with new pipes and for installation of three fastened foam-extinguishing techniques within the form of foam displays to fight incipient fires directly. In addition, a cellular foam monitor was deliberate as a backup.
A third focus space considerations safeguarding the ability provide required for early fireplace detection and fireplace combating. According to the regional energy provider, energy outages might have a duration of a minimum of 30 minutes. Given this, the tank-farm wanted an impartial energy provide system that was ready to ensure energy supply for at least 2 hours. The specialists relied on battery buffering and a diesel operated emergency energy unit to unravel this drawback.
Fire safety should guarantee achievement of the protection aims
Protection aims and equal security degree reached
The fire-protection answer introduced by TÜV SÜD was agreed with each the tank farm’s working company, the municipal authority and the skilled fireplace department. The three measure packages additionally complied with the required protection objectives and the protection levels. And finally, they proved far cheaper than the answer initially proposed. Since rehabilitation of the tank farm, early fire detection at the side of improved fire-protection infrastructure has turn out to be a central a half of harm limitation. Since the rehabilitation concept was applied, the tank-farm’s working company – working with the professional fire division – has been capable of successfully counteract all potential situations of incipient hearth successfully 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 more 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 includes the dealing with and storing of extremely explosive or flammable substances. Protection measures and safety precautions thus not only fall within the operating company’s accountability but are also a matter of public curiosity. Given this, the BayBO stipulates requirements including material requirements which, as “General clauses of fire protection”, help to assist the protection aims defined in Article 12. However, in accordance with article 3 (1) deviations from the technical building laws are possible if another answer is found that’s equal by way of fulfilling the overall requirements in paragraph 1. In other words, the requirements laid down in the Building Code are deemed complied with if the commonly recognised rules of structure and technology are fulfilled.
Share