Storagetech is an Atex certified designer and manufacturer with extensive experience providing technologically advanced atmospheric storage tank and pipeline safety breather valves, vents and flame arrestors for oil, gas, biogas, petrochemical, chemical, pharmaceutical, agro, water, wastewater treatment, and utility industries
According to the academic resources, the operating principle of Flame Arrestor was founded in 1815, England at the Royal Institution of England. A committee of the English coal mining industry had needed for a protection method to prevent miners 'oil lamps from causing explosions when flammable gas called firedamp seeped into the mine shafts.
Modern Flame Arrestors
Flame and detonation arrester, although similar in construction, serve two very distinct purposes. Here answer some of the most common questions asked about flame and detonation arresters. A flame arrester is a safety device that is used on the pipeline or end of the line to block any fire or explosion passage through the line. There are mainly two types of flame arrester; detonation and deflagration. Detonation flame arrester is designed to overcome any sudden explosion impact in the pipeline, whereas deflagration is flame arrester is designed to block any fire flame in a particular location to stop fire to travel in the pipeline freely. Storagetech technical team is experienced to choose which type of flame arrester is required for a particular application. Even though there are many factors to choose, mainly location, product stored, and pipeline/piping design plays an important role.
In-line Flame Arrestors
Sometimes it is desirable to install flame arresters in the middle of a long pipeline. They are particularly suited for installation inside a tank house where vent pipes or lines are extended through the tank house roof or walls to the outside. Locating the unit inside eliminates difficult inspections on the storage tank roof and protects the vent from the freezing of condensate. Combustion in a pipeline can readily make the transition from deflagration than detonation; in the case of some designs, a detonation can be stopped, whereas a deflagration may pass through. Therefore, an in-line flame arrester must withstand and stop both types of combustion from both downstream and upstream in a pipeline. Since the pressures developed in the combustion can be high, the in-line arrester and pipeline must be properly designed, constructed and tested. The flame arrester element itself must be capable of withstanding substantial pressure differentials in both directions as a result of the combustion.
End-of-line Flame Arrestors
This type of flame arrester is installed on low-pressure storage processing tanks, bleed tanks, or other waste gas devices. Normally, they are installed on a vent nozzle mounted on a tank that is discharged directly into the atmosphere. They can also be incorporated as integral parts of conservation vents installed on atmospheric storage tanks containing flammable liquids. It should be noted that flame arresters are not always necessary as part of conservation vents. The gases produced by vaporization of many flammable liquids have similar flame speeds when mixed with air. Typical of these are gasoline, jet fuel, benzene, plastics monomers, and organic solvents. Often the pressure drop across the vent valve of a conservation vent is a ¾ inch (17mm) of water or more. In this case, the velocity of the gas flow through the vent-valve opening will be higher than the speed at which the flame can propagate upstream through the opening.
Deflagration Flame Arrestors
Emergency Relief Valve
HOW TO TACKLE SAFETY AND ENVIRONMENTAL CHALLENGES OF STORAGE TANK OPERATORS
RECENT EXPLOSION TRAGEDIES have brought into focus the importance of engineering and building standards for storage tanks and industrial plants.
Storagetech™ has taken the necessary action in terms of appropriate standards of designing, building and supplying storage tanks and tank equipment to protect tank operators, their assets and the environment. In September 2017 a rare lightning strike hit a storage tank in an above ground storage tank refinery in Columbia. A supervisor later discovered that the combination of a pressure/vacuum relief valve with flame arrester prevented a large accident by blocking the fire passage through the line through its flame arrestor device. “Using this combined technology prevents the ignition sources that may occur outside of the tank from interacting with the released gas during the breathing of the tank, and also blocks the transmission of deflagration flame and the passage of heat into the tank,” says Mahmut Tunaz, design engineer at ERGIL Turkey.
Multiple causes for safety and environmental challenges
Fig3.September 2017 – An Äager Brand Storagetech™ Flame Arrestor device saved the entire storage tank refinery of Grupsoil in Colombia.
Technologically advanced solution for the protection of storage tanks and the environment
Äager brand Storagetech™ combination of the pressure/vacuum relief valve with flame arrester is a technologically advanced and environmentally friendly device and was developed with the dedication and extensive experience of Storagetech™ It provides protection, efficiency and emission control for storage tanks. The combination of pressure/vacuum relief valve and flame arrester can be categorised into different types. However, the pressure/vacuum relief valve with integrated end-of-line flame arrester is considered the most effective combination, ensuring ultimate protection against damage through overpressurisation and implosion due to vacuum conditions, and preventing any external flame entering the tank with its flame arrester winding system. In the closed position, the pressure relief pallet and diaphragm assembly are held tightly against a seal to prevent the loss of vapour to the atmosphere. The opening set-point is selectable from a range between 1 and 28.1 W.C. (2.5 and 70 bar), and the valve will reseal when the tank returns to a safe pressure.
Äager brand Storagetech™ pressure/vacuum relief valve with integrated flame arrester is ATEX and ISO approved. Ensured performance for the combined device. It includes an optimised weather hood for severe weather conditions, and installation of electrical heating is available for standard design. This combined technology is maintenance friendly and provides no loss of vapour or explosion mitigation effect for routine inspection of the flame arrester. Ten per cent overpressure advanced technology reduces vapour emission to a minimum, and it also has very low leak rates to reduce explosion risk and ensure compliance with environmental requirements. This special combined technology will meet tank operators’ safety and environmental requirements when receiving periodic maintenance. As a result, it is favoured by many tank operators.
Fig.4. Combination of Flame Arrestor with Pressure Vacuum Relief Valve
Storagetech™ offers a wide range of flame arresters storage tank valves that includes end-of-line and the in-line flame unit for both deflagration and detonation service. These units prevent the risk of fire affecting the contents of storage tanks and pipelines.
The Company operates accredited management systems to guarantee its products are manufactured in accordance with international standards, and to maintain quality and materials traceability which leads to customer satisfaction and products that function safely. These include ISO 9001:2008 – Quality management systems, ISO 14001:2004 – Environmental management systems, and OHSAS 18001:2007 – Manual for occupational health and safety system. Engineering standards in place include the ASME U-Stamp Boiler and Pressure Vessel Certification, CE marking, and ATEX certification relating to Directive 94/9/EC – Equipment and protective systems intended for use in potentially explosive atmospheres.
Fig.5. ERGIL's packing system for keeping your products undamaged and safe before dispatch.
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