flash point of oil

The flash point for oil is the lowest temperature at which an oil sample develops sufficient vapours under specified conditions for the air-vapour mixture above the sample to ignite for the first time without continuing to burn afterwards. In the case of greases, the drop point is one of the most important properties. The use of the flash point as a measure of a liquid’s hazardousness dates from the 19th century. Pine oil is an essential oil obtained by the steam distillation of stumps, needles, twigs and cones from a variety of species of pine, particularly Pinus sylvestris.As of 1995, synthetic pine oil was the "biggest single turpentine derivative." In addition, there can be analyst subjectivity when using this test procedure (AOCS Cc 9a-48 method)… Oils with a lower flash point are determined in closed crucibles according to Abel-Pensky (DIN 51755) or Pensky-Martens (DIN 51758). While every effort has been made to follow citation style rules, there may be some discrepancies. Let us know if you have suggestions to improve this article (requires login). The flash point is the lowest temperature at which a substance vaporises into a gas, which can be ignited with the introduction of an external source of fire. The flash point contributes significantly to the scope of application of a lubricant. The test is done in either an “open cup” or a “closed cup” apparatus, or in both, in order to mimic the conditions of storage and the workplace. The flash point for oil is the lowest temperature at which an oil sample develops sufficient vapours under specified conditions for the air-vapour mixture above the sample to ignite for the first time without continuing to burn afterwards. Updates? Basically, it can be said that the flash point of paraffin-based oils with a density between 860 and 890 kg*m-3 is between 200 and 280°C. Flash point, the lowest temperature at which a liquid (usually a petroleum product) will form a vapour in the air near its surface that will “flash,” or briefly ignite, on exposure to an open flame. Below the Below the flash point, insufficient vapour is available to support combustion. We have compiled some examples of our oils with their associated flash points, including oils for high temperature applications. Thus, the flash points of different oils are well comparable. (This temperature is known as the fire point.). Corrections? Flash point, the lowest temperature at which a liquid (usually a petroleum product) will form a vapour in the air near its surface that will “flash,” or briefly ignite, on exposure to an open flame. The drop point is the temperature at which the grease begins to leak. In contrast to oil, the determination of the flash point is not so important for lubricating greases. Flash points are measured by heating a liquid to specific temperatures under controlled conditions and then applying a flame. ADDINOL Lube Oil GmbH Am Haupttor D-06237 Leuna, Telephone + 49 (0) 3461 845-0 Fax + 49 (0) 3461 845-555 E-mail info@addinol.de, The oil is heated slowly under standardised test conditions. Omissions? The engine oils of ADDINOL have a flash point of more than 200 °C. Particularly in combustion engines, the oil may mix with fuel after prolonged periods of use, resulting in oil dilution. Like the pour-point factor, the flash point may in some instances become the major consideration in selecting the proper…. The flash point, or the temperature at which a lubricant momentarily flashes in the pressure of a test flame, aids in evaluating fire-resistance... Get a Britannica Premium subscription and gain access to exclusive content. The smoke point, also referred to as the burning point, is the temperature at which an oil or fat begins to produce a continuous bluish smoke that becomes clearly visible, dependent upon specific and defined conditions. There are two main methods of measuring a flash point – namely, open cup and closed up. For naphthene-based oils with a density between 890 and 960 kg*m-3 flash points of 235 °C and lower are reached. In the case of engine oils for passenger cars, flash points of 200 °C to 270 °C are usually achieved. Before gasoline became important, kerosene was the main petroleum product (used mainly as fuel for lamps and stoves), and there was a tendency on the part of petroleum distillers to leave as much as possible of the commercially worthless gasoline in the kerosene in order to sell more product. Smoke, flash and fire points may vary within a source oil due to such factors as processing techniques, and/or seasonable variations. The flash point, or the temperature at which a lubricant momentarily flashes in the pressure of a test flame, aids in evaluating fire-resistance properties. Synthetic pine oils accounted for 90% of sales as of 2000. However, there are also 2-stroke oils without premix components with a higher flash point. Legal measures were instituted to curb the danger, and test methods were prescribed and minimum flash points set. High temperature greases can reach drop points of approx. The flash point is at least 270 °C. Please refer to the appropriate style manual or other sources if you have any questions. Since many 2-stroke oils are burned as a result of mixed lubrication in the engine compartment in conjunction with the fuel, the flash points of 2-stroke oils are usually lower than the flash points of normal engine oils for cars. 300 °C. ADDINOL POLE POSITION HIGH SPEED 2T has proven itself for use in racing motorcycles. ADDINOL offers many special oils which have a particularly high flash point to withstand high temperature conditions. This adulteration of kerosene with highly volatile gasoline caused numerous fires and explosions in storage tanks and oil lamps. Since the flash point is an important constant for lubricants of all kinds, each oil is tested with regard to its flash point. The flash point alone is not a sufficient quality feature of oil, nor does it allow conclusions about the suitability of the oil. Oils with a flash point above 79 °C are determined according to ISO 2592 in an open crucible according to Cleveland. The risk of fire and explosion would be too high. This means that the thickener can no longer bind the oil and the fat liquefies. Oil for two-stroke engines without premix components, Chain lubricant for high temperature applications, Lubrication of conveyor technology in high-temperature plants, Hydraulic oil for high temperature applications. It is also not draw any conclusions on the oil consumption in combustion engines from this. The flash point is a general indication of the flammability or combustibility of a liquid. The standardized test procedures ensure constant basic requirements and ambient conditions. Why does the flash point of oils sometimes drop during use? Our editors will review what you’ve submitted and determine whether to revise the article. This article was most recently revised and updated by, https://www.britannica.com/science/flash-point. Some special oils for industrial applications can reach flash points above 300 °C. Each oil has a different flash point. Especially for racing motorcycles, the flash point of the oil is a quality feature, as the oil burns more slowly and the additives protect the engine longer. Depending on the application, a certain flash point may also be required. The flash point is a general indication of the flammability or combustibility of a liquid. Representative liquids and their approximate flash points are: Commercial products must adhere to specific flash points that have been set by regulating authorities. The entry of foreign substances, fuel or water is also the reason why the flash point of other oils could drop. At some temperature above the flash point, the liquid will produce enough vapour to support combustion. The flash point of some 2-stroke oils is approximately 130 °C. The focal point is usually only a few degrees Celsius above the flash point. Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox. Of course, no oil with a flash point of 150 °C can be used in a system where peak temperatures of over 150 °C are reached. If the oil-air mixture burns for at least five seconds or longer, this is referred to as the focal point of the oil. Once the drop point of a lubricating grease has been reached, it can no longer maintain the lubricating film as desired. 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