Fire point

The fire point can provide information on fire hazards, for example after the spill of a flammable liquid, whilst the flash point indicates the existence of an explosive atmosphere. 

The flash point implies that the ignited vapour goes out shortly after ignition, whereas the Are point is obtained by heating the liquid such that the fire continues after ignition (vid. [3]). Table 2.23 shows a comparison between the flash points and the fire points of selected materials. 

A self-sustaining fire does not necessarily develop at the flash point. A closely related and less common term is fire point. Fire point is the temperature at which the initial flash becomes self-sustaining. For higher flash point materials, the fire point is usually a few degrees above the flash point. 

Asa rule of thumb, flash point can bethought of as the temperature above which a pool of liquid will ignite if a match or other small ignition source is dropped into it. If the temperature of the pool is below flash point, the pool will not ignite. From a safety perspective, a release of liquid below its flash point should not ignite even if it finds an ignition source. 

The flash point and other important properties of some common materials are listed in Table B-2 (modified from NFPA 86, Table 7-5.2.2a and NFPA 325, 1994). 

Properties of Commonly Used Flammable Liquids in US. Customary Units 

Solvent Name Molecular Weight Flash Point °F Autoignition °F LEL% by Volume UEL% by Volume Boiling Point °f 

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Smoke, Flash, and Fire Points. These thermal properties may be determined under standard test conditions (57). The smoke poiat is defined as the temperature at which smoke begias to evolve continuously from the sample. Flash poiat is the temperature at which a flash is observed whea a test flame is appHed. The fire poiat is defiaed as the temperature at which the fire coatiaues to bum. These values are profouadly affected by minor coastitueats ia the oil, such as fatty acids, moao- and diglycerides, and residual solvents. These factors are of commercial importance where fats or oils are used at high temperatures such as ia lubricants or edible frying fats. 

Fluid Chemical composition Temperature range, °C Min Max Viscosity, mPa-s(= cP) Vapor pressure, kPA Pour point, °C Flash point, °C Fire point, °C ait/ °C... 

Some of the tests and criterion used to define fire resistance may be found in the Hterature (9). Additionally, the compression—ignition and hot manifold tests as defined in MIL-H-19457 and MIL-H-5606, respectively the Wick test as defined by Federal Standards 791, Method 352 flash point and fire point as defined in ASTM D92 autoignition temperature as defined in ASTM D2155 and linear flame propagation rate are defined in ASTM D5306 are used. 

The physical properties of methylene chloride are Hsted in Table 1 and the binary a2eotropes in Table 2. Methylene chloride is a volatile Hquid. Although methylene chloride is only slightly soluble in water, it is completely miscible with other grades of chlorinated solvents, diethyl ether, and ethyl alcohol. It dissolves in most other common organic solvents. Methylene chloride is also an excellent solvent for many resins, waxes, and fats, and hence is well suited to a wide variety of industrial uses. Methylene chloride alone exhibits no dash or fire point. However, as Htde as 10 vol % acetone or methyl alcohol is capable of producing a dash point. 

Flammability information Flash point Fire point Flammable limits (LEL, UEL) Ignition temperature Spontaneous heating Toxic thermal degradation products Vapour pressure Dielectric constant Electrical resistivity Electrical group Explosion properties of dust in a fire... 

FIRE POINT The minimum temperature at which a mixture of gas/vapour and air continues to burn in an open container when ignited. The value is generally above the flash point. 

The flash point represents the minimum temperature at whieh an ignitable mixture exists above a liquid surfaee. By definition, flash points are inapplieable to gases. Some solids, e.g. naphtlialene and eamphor, are easily volatilized on heating so that flammable mixtures develop above the solid surfaee and henee flash points ean be determined. (However, although these substanees ean be ignited, they generally need to be heated above their flash points in order for eombustion to be sustained this is the fire point .)... 

Fire Point — the temperature at whieh a liquid gives off enough vapor to eontinue to bum when ignited. 

Fire point The temperature at whieh a material eontinues to burn when the ignition souree is removed. 

Fire point The temperature at which a liquid gives off sufficient flamntabie vapor to produce sustained combustion. 

Fire point The lowest temperature at which a liquid in an open container will give off enough vapors to continue to burn when once ignited [32]. This temperature is generally somewhat above the open-cup flash point. 

The oil for an oil-base mud can be diesel oil, kerosene, fuel oil, selected crude oil, or mineral oil. There are several requirements for the oil (1) API gravity = 36° - 37°. (2) flash point = 180°F or above, (3) fire point = 200°F or above, and (4) aniline point = 140°F or above. Emulsifiers are more important in oil-base mud than in water-base mud because contamination on the drilling rig is very likely, and it is very detrimental to oil mud. Thinners, on the other hand, are far more important in water-base mud than in oil-base mud oil is dielectric, so there are no interparticle electric forces to be nullified. 

Equipment should be purchased from reputable manufacturers. They should be located at clearly defined fire points. All equipment should be recharged after it has been used. Manufacturers instructions for maintenance and recharging must be followed closely. Regular inspection and maintenance of all firefighting equipment is essential, otherwise it is liable to deteriorate and prove unserviceable when needed. 

Fire point is the temperature at which a substance gives off vapor in sufficient quantity to ignite and continue to burn when exposed to a spark or flame. Like flashpoint, a high fire point is required of desirable hydraulic liquids. 

Crude DNN can be detond when confined and heated, its explodability is lower than DNB or AN its fire point is ca 350° (Ref 53). 

Expl limits of styrene in air are 1.1 to 6.1% at 30° Fire point (Tag open cup) is 94 °F. Styrene polymerizes exothermally at above RT conditions. A run-away polymerization can be expl... 

A 35% solution is colorless, has a pH level of 10.0, and has no flash point or fire point (important). A 65% hydrazine solution is approximately 100% hydrazine hydrate. Global producers include Bayer A.G., Elf Atochem S.A., and Olin Mathieson Corporation. 

However, most common amines tend to have a flash point below 200 °F/93 °C and are therefore classified as either combustible or flammable. CHA and morpholine have particularly low flash points (88 °F closed cup/90 °F open cup and 95 °F closed cup/99 °F open cup, respectively). Fire points are higher and the risk of a flash is therefore... 

It is not always necessary to demulsify the water, however, because when small quantities are present in fine droplet form, the water explodes at the burner firing point, improving atomization of the fuel and providing for more complete combustion. Consequently, a water-in-oil emulsifier may be used to deliberately retain the water as small, emulsified droplets. The overall effec-... 

Flammability information Flash point Fire point... 

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