File Name: determination of flash and fire points .zip
Fire safety includes fire signs, tags and labels from Safety Emporium. Flash point is the lowest temperature at which a liquid can gives off vapor to form an ignitable mixture in air near the surface of the liquid.
Flash point is the lowest temperature corrected to a barometric pressure of The material is deemed to have flashed when a large flame appears and instantaneously propagates itself over the surface of the specimen. Note: Occasionally, particularly near the actual flash point, the application of test flame will cause the blue halo or an enlarged flame; this is not a flash and should be ignored. It is the lowest temperature at which a specimen will sustain burning for 5 seconds. Asphalt Cement shall be oil asphalt or a mixture of refined liquid asphalt and refined solid asphalt, prepared from crude asphaltic petroleum. It shall be free from admixture with any residues obtained by the artificial distillation of coal, coal tar or paraffin and shall be homogeneous and free from water. Fire Point.
The flash point of a material is the lowest temperature at which the application of test flame causes the vapours from the material momentarily catch fire in the form of a flash under specified conditions of test. In practical view the fire point is the lowest temperature at which the application of test flame causes the material to ignite and burn at least for 5 seconds under specified conditions of test. At high temperatures, bituminous materials emit hydrocarbon vapours which are susceptible to catch fire. Therefore the heating temperature of bituminous material should be restricted to avoid hazardous conditions. Flash point and fire point tests are used to determine the temperature to which bituminous material can safely be heated. To determine flash point and fire point of the bituminous material. The stirring device consists of a vertical steel shaft of 2.
This test is done to determine the flash point and the fire point of asphaltic bitumen and fluxed native asphalt, cutback bitumen and blown type bitumen as per IS: — The principle behind this test is given below :. Flash Point — The flash point of a material is the lowest temperature at which the application of test flame causes the vapours from the material to momentarily catch fire in the form of a flash under specified conditions of the test. Fire Point — The fire point is the lowest temperature at which the application of test flame causes the material to ignite and burn at least for 5 seconds under specified conditions of the test. The sample should be just sufficient to fill the cup upto the mark given on it. Stir it thoroughly to remove air bubbles and water.
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In general, flash point is the lowest temperature of the test specimen, corrected to a barometric pressure of kPa, at which the application of an ignition source causes the vapor of the test specimen to ignite momentarily and the flame to propagate across the surface of the liquid under the specified conditions.
The flash point is a general indication of the flammability or combustibility of a liquid. Below the flash point, insufficient vapour is available to support combustion. At some temperature above the flash point, the liquid will produce enough vapour to support combustion. This temperature is known as the fire point.
And, because of its low cost, simplicity and versatility, the test is popular among the used oil analysis community as well. The flash point is the lowest temperature at which the vapor above the oil sample will momentarily ignite or flash when an ignition source is passed over it. The flash point typically degrees C or degrees F for mineral oils is an indication of the safety hazards of a lubricant with respect to fire and explosion. However, the flash point should not be confused with the auto ignition temperature AIT , which is the temperature typically degrees C or to degrees F for mineral oils at which the oil vapor will combust spontaneously without an ignition source. This is an important property of fire-resistant hydraulic fluids in EHC systems on steam turbines.
Introduction The flash point of a volatile liquid is the lowest temperature at which it can vaporize to form an ignitable mixture in air. Measuring a liquid's flash point requires an ignition source. At the flash point, the vapor may cease to burn when the source of ignition is removed.
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