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Iva Vietnam co.,ltd is a company specialising in the supply of equipment to assist in the control and environmentally friendly handling of all fluids and gasses. Through many years of experience along with partnerships with various locally and internationally recognised engineering companies, equipment manufacturers and suppliers, we are well positioned to satisfy the specific requirements of the industries and companies we serve.
STOP THE FLAMES REACHING
- Regulator or the cylinder in an LPG gas cylinder.
- Tanks or vessels containing flammable material
- Furnaces using pre-mixed gases or hydrogen atmosphere.
USE OF FLAME ARRESTOR TO
- Extinguish flames in pipelines, ducts and vents carrying flammable gases or vapors and prevent them from spreading to other parts of the system.
- Prevent the propagation or spread of flames by absorbing and dissipating heat from the flames on one side of the arrestor. So preventing the temperature of the gas or vapour on the opposite side rising to ignition point.
- Dandekar Industries presents a safety device that will arrest the flame, absorb the heat and reduce the flame temperature to below ignition point of gas or vapour.
- Dandekar Industries has carried out continuous research to develop a unique dry-type flame arrestor using perforated disc, ceramic cartridge or sintered metal seals.
FIT THE FLAME ARRESTOR FOR YOUR APPLICATION
- Flame arrestors are fitted on vent valves open vent pipes of storage tanks, suction or delivery pipe lines , acetylene generators, petroleum, oil, or liquefied petroleum storage or processing or piping system.
- Fit the flame arrestors on the suction side of fuel line on the burners used industrial furnaces.
- Fit the flame arrestors on chimneys on thermo Pac or boilers.
CUSTOMISED SOLUTIONS SUITED FOR YOUR NEEDS AND REQUIREMENTS
Dandekar Industries provides the flexibility of selecting between SS316, copper or aluminum material for construction or either welded or bottled by tie rods.
SIZE VARIATIONS OF THE FLAME ARRESTORS
From applications varying from small sized domestic LPG cylinders to large sized room ventilators. Flame Arrestor can be designed to suit every application.
Dandekar Industries offers flame arrestor solutions varying in sizes and shapes that meet the domestic and industrial requirements.
USE OF FLAME ARRESTORS
Many processes involve the transportation of potentially flammable or explosive gases or vapours through varying length of pipe, where there is potential for ignition. suitable measures need to be taken to ensure that in the event of these materials igniting, damage to plant is minimized.
The most effective methods of quenching such flames is to install flame arrestor either at a strategic point along the pipe line or at end of pipe line where materials are being vented in to atmosphere.
IMPORTANCE OF FLAME ARRESTORS
Flame Arrestor is designed to protect the tank by preventing the flame propagation & explosion in the tank.
The Flame Arrestor element dissipates the heat of flame below the ignition point of the vapours.
when the storage tank contains liquids having flash point lower than the possible tank temperature, flame arrestors are recommended.
Flame Arrestors, when properly applied are effective, passive device against the propagation of flame front.
The function of flame arrestor is to restrict the transmission of flame front from the unprotected side to the protected side of device.
APPLICATION OF FLAME ARRESTORS
- Storage Tank Vents
- Oil / Petrochemical Refineries
- Offshore Drilling Platform Vents
- Flare Stakes
- Pulp & Paper Nag Processing
- Vapour Inclination Systems
- Chemical Processing Plants
- Marine Loading Systems
- Vapour Recovery Systems
- Landfill Gas Inclinators
- Sewage Treatment Vapour Processing
- Pharmaceuticals
HOW TO FLAME ARRESTORS WORKS
Flame arrestors are passive device with no moving parts. they prevent the propagation of flame from the exposed side of the unit to the protected side by the use of wound crimped metal ribbon type flame cell element called as Honeycomb. this construction produces a matrix of uniform openings that are carefully constructed to quench the flame by absorbing the head of the flame. this provides an extinguishing barrier to the ignited vapour mixture.
Under normal operating conditions the flame arrestor permits a relatively free flow of gas or vapour through the piping system .if the mixture is ignited and flame begins to travel back through the piping. the arrestor will prohibit the flame from moving back to the gas source.
The type of gas in the system determines its gas grouping and therefore predetermines the type of arrestor required. the element must be designed to accommodate the specific gas group that could possibly ignite and propagate in the system. the more explosive gases require the flame cell channel to absorb the heat more quickly and efficiently.
FLAME PROPAGATION
The difference between the vapours types of flame arrestors are mainly based on the nature of the flame which is expected (especially how fast it moves) and on the expected intensity of pressure pulse created by the flame. a flame is a volume of gas in, which a self-sustaining exothermic (heat producing) chemical reaction is occurring. the reaction is presumed to be oxidation, also known as combustion.
To have a flame three things must be present, oxygen (supply of air) very high temperature (initially supplied by ignition source), and a flammable gas. flammable gas mixed with air in suitable proportions called a combustion mixture. so long as these requirements remain available, a flame can burn indefinitely. Flame arrestors operate by removing one of these elements, high temperature.
In a stationary flammable mixture, a flame seems to move toward the unburned gas leaving combustion products behind that apparent motion is called flame propagation. the flame exists only with in a relatively narrow volume at boundary between the unburned gases and the combustion products.
The speed at, which the flame propagates is measured at the front edge of flame. this speed depends on several variables including the speed of the chemical reaction air- to-gas mixture ratio, and whether the flame confined or unconfined.
A critical concern in flame arrestor installation is possibility of a flame stabilizing on the face of the flame cell element. a flame that continuously burns against the flame cell element for a period of time can heat the element above the gas auto ignition temperature resulting in the flame propagation through the element. the time period varies with the type of element, mixture & flow velocities to achieve the highest achievable temperature at the element.
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