Storage Tank Protection - Angus Fire

1 Storage Tank Protection Investing in the safest solution Fire in a Storage tank, or in the surrounding foams for hydrocarbon based risks preferably UL is the most widely recognised approvals bund, is a challenge to both fire fighters and Fluoroprotein foams (FP) with their excellent body that tests both the foam concentrate tank operators. The value of the contents heat resistant properties and slow drainage to together with the delivery equipment that makes the provision of fire Protection specialised foams for polar solvent or other it will be used with, making it a true systems'. commercially viable, while the risk to life water miscible risks, such as Alcohol Resistant approval. makes it essential. Aqueous Film Forming Foam (AR-AFFF) or AR-FFFP (Alcohol Resistant Film Forming Angus Fire Fluoroprotein).

2 As a world leader in fire Protection , with a track The fire Protection options available to tank record of over 220 years and operations in more operators and designers are wider than Foam Induction than 100 countries around the world, Angus ever before, and the selection of the right At the heart of tank Protection is the choice Fire remains at the forefront of the design of combination of equipment can mean the of the foam induction proportioning system, cutting-edge fire equipment products that difference between safe operation and disaster. or in other words, mixing the foam and water meet the most stringent standards and are Many factors influence the decision making; in the correct proportions. The foam delivery approved by key industry approval bodies. the type/design of atmospheric Storage device, such as a Top Pourer or a Rimseal Pourer, An important part of our range is equipment tanks , the layout and spacing of the tanks , the dictates the amount of foam solution required.

3 To protect fuel Storage Depots and Terminals. construction of the bund walls and the product For systems where the foam solution demand is Angus Fire manufactures both the equipment stored in the tanks . constant, fixed inline inductors can be used. For and the foam concentrate needed to protect systems with variable foam solution demand, these high risk assets. Almost uniquely amongst Standards two options are available, either balanced Fire Protection companies, Angus Fire has the From the fire Protection perspective EN13565 pressure foam proportioner(s) with a bag tank, ability to design and engineer the systems most Part 2 Section and in the US, the NFPA or balanced pressure proportioner(s) with a commonly used for tank Protection . As a result (National Fire Protection Association) publish balanced valve on a foam skid.

4 Foam Skids can we are well placed to guide our customers guidelines for tank fire Protection . These classify be powered by water, electric or diesel driven through the myriad of equipment available for the product stored by fire hazard and specify motor foam pumps. Single or multiple skids can these applications. the foam delivery rates, layout, and spacing of be sized to feed all the foam system on the site. foam delivery systems. Foam application rates Thus foam skids (and water deluge skids) are depend on the tank contents, and start at 4 bespoke items which are not readily available litres/m2/min typically and could rise as high as off the shelf. 12 litres/m2/min for foam destructive products such as Polar Solvents, where fixed foam Approvals systems are installed. The engineering and design of foam skids and entire fire systems is a service provided by Angus Fire manufactures a wide range of fire Angus Fire Engineering (AFE).

5 AFE's team of Protection products and systems, which meet dedicated engineers are specialists in systems international safety guidelines for the Storage design for high value, high risk applications. of petroleum products in terminals, refineries They are familiar with the details of the and petrochemical installations. In selecting international standards that are specified the correct equipment to protect your specific by most insurance companies and major risks, Angus Fire can support you with technical international oil companies. However, the expertise from our in-house engineering and system design is no good if the equipment design team. connected to it (top pourers, rim seal pourers etc.) does not perform to specification. To Foam Concentrates overcome this, many insurers and operators Firefighting foam is an essential component insist that the equipment is approved by an of all tank Protection systems.

6 Angus Fire independent body. Angus Fire manufactures Angus Fire protecting Lives, manufactures a range of foam concentrates products certified by international organisations the Environment and to suit differing application systems and tank such as UL (Underwriters Laboratory) in the US, content. These range from general purpose and in Europe test protocols such as LASTFIRE. Critical Assets Fixed Roof Tank Fixed/cone roof tanks are used to store Back Pressure Generators are used to inject hydrocarbon or polar solvents fuels with expanded foam through the bottom of the vapour pressures close to atmospheric. They tank. As they are located at ground level base are usually designed to have a weak seam injection systems are easy to maintain. The between the shell and the roof to allow Angus HBPG is able to operate against a back the roof to blow off in the event of a major pressure of 45%.

7 Catastrophe. Some fixed roof tanks feature an inert gas blanket to minimize the risk of fire in Water Cooling the vapour space. In fixed roof Storage tanks Provision should be made for the application of fires commonly start as a result of over filling cooling water to fixed roof tanks , to minimise the tank. the effect of radiated heat. For the roof itself Angus offers a Mushroom Nozzle and the tank walls can be cooled with the Angus Fire Foam System Tank Cool Nozzle. Oscillating Monitors can be Fixed roof Storage tanks are protected using Top used to provide additional cooling to the tank Pouring Systems designed to apply foam gently surface. through the tank wall onto the burning surface of the fuel. Gentle application is preferred to The Angus Fire OM80 monitor is an automatic maximise the efficiency of the finished foam.

8 Oscillating unit which means it uses a small The Angus Fire Top Pourer features a unique amount of the water from the fire ring mains, butterfly nozzle that is designed to throw the which is converted from rotational energy foam back onto the tank wall. One of the most into a horizontal sweeping action, moving the important requirements is that the selected Top monitor from side to side through 120 Degrees. Pourer can be easily accessed for maintenance The graphic shows am OM80 monitor fitted Top Pourer and testing. The Angus Fire Top Pourer features with a jet spray nozzle. Other options could an easily accessible pivoting top cover to allow be a Geared or a Lever Operated Monitor as the system to be tested and samples taken, pictured elsewhere. without discharging foam into the tank. Bund Protection For pressurised tanks Angus Fire manufactures Bund Protection equipment is often neglected a specific range of Top Pourers to protect tanks as the focus is mostly on the tank itself.

9 That are pressurised in this way. Other fixed However a fire in the bund area resulting from roof tanks have internal blankets to suppress a leaking tank, valve or a fractured pipe can the release of vapours and depending on the equally result in a major incident. A medium type of blanket the firefighting system can be expansion foam system to protect the bund designed in the same way as for a floating roof can provide both vapour suppression and tank. firefighting. The Angus MEX Bund Pourers are designed specifically for this risk using medium To protect fixed roof tanks for aviation expansion foam. They operate at low pressure depots base injection is often preferred. High with minimal water demand. OM80 Oscillating Monitor Open Floating Roof Tank (up to 60 metre diameter). Floating roof tanks are widely used to store Water Cooling large quantities of petroleum products Water cooling for adjacent tanks is vital to such as crude oil and condensate.

10 They are minimise the effect of radiant heat and the designed as opened top cylindrical steel possibility of fire spreading to other tanks in shells fitted with internal floating roofs that the same bund. Medium velocity water spray rise and fall as the liquid level in the tank nozzles are often specified for this purpose. changes. By floating on the fuel surface the However Angus Fire manufactures a specific roof helps to minimise vapour loss. 90% of Tank Cool Nozzle, which has an ideal spray fires in open floating roof tanks start in the pattern for this application. Fixed monitors are seal between the floating roof and the tank often installed at strategic points around tank wall, known as the rim seal. bunds to supplement the rim seal systems. The graphic shows a Geared Monitor with hand wheels to control rotation and elevation along Foam System with a foam cannon.