Flash point testing was developed in the late 1800s and has been refined and automated over the decades to produce the automatic which are on the market today. The discovery of petroleum and the increased use of flammable distillates in the 19th century for lighting and heating in place of animal and vegetable oils led to a large number of explosions and other fire-related accidents. The cup and test portion are heated and stirred, apertures are then opened in the lid to allow air into the cup and also the ignition source to be dipped into the vapors to test for a flash. The test method can be summarized as follows: A brass test cup of specified dimensions, filled to the inside mark with test specimen and fitted with a cover of specified dimensions, is heated and the specimen stirred at specified rates, using one of three defined procedures A, B, or C. Please first with a verified email before subscribing to alerts.Next
Therefore, for the purposes of application of the procedure of the test method for the separate temperature scale thermometers, different increments must be used. Product Description: Qualtech Products Industry professional Automatic Flash Point Tester is a precision Pensky—Martens Closed-Cup Flash-Point Test Instrument to determine the Flash-Point of volatile samples. The first application of the ignition source with the fresh test portion is recommended to be approximately 24 °C below the temperature at which a flash point was detected on the first application. Make the first ignition source application at 5 °C above the starting temperature and follow the procedure given in 10. Fully automated, this model simplifies and expedites flash point testing for both novice and experienced operators. Note 1: Flash point determinations above 250 °C can be performed, however, the precision has not been determined above this temperature. Repeat the test using a fresh test portion, adjusting the temperature of the first application of the ignition source until a valid determination is obtained, that is where the flash point is 18 °C to 28 °C above the temperature of the first application of the ignition source.Next
This standard is also available to be included in Standards Subscriptions. Note 2: It has been common practice in flash point standards for many decades to alternately use a C-scale or an F-scale thermometer for temperature measurement. Martens and was based on the original tester by Mr. Flash point testing is required in the petroleum industry to characterize fuels and petroleum-based products as part of quality control and to meet safety regulations concerning the transport of these products. Diese Internationale Norm gilt nicht für Lacke und Anstrichstoffe auf Wasserbasis. Place the lid on the test cup and put them in the heating chamber.Next
Samples are heated quickly and steadily via electronic regulator, ensuring optimal testing procedures in compliance with multiple aforementioned regulations. The closed-cup test like the Pensky-Martens predominates in product specification and regulations due to its greater precision and its ability to detect contaminants. It is applicable for liquids with a flash point above 40 degrees C. Ensure that the locating or locking device is properly engaged and insert the temperature measuring device. It is not necessary to correct the barometric pressure to 0 °C, although some barometers are designed to make this correction automatically.
It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Continued heating can result in significant burning of vapours outside the test cup, and can be a potential fire hazard. The liquid sample inside the brass cup is automatically mixed at a specified speed and heated at a specified temperature rate in accordance with the sample specifications. Ein fortgesetztes Erhitzen kann zu einem erheblichen Verbrennen von Dämpfen außerhalb des Tiegels führen und eine potentielle Brandgefährdung darstellen. However, results of these test methods may be used as elements of a fire risk assessment which takes into account all of the factors which are pertinent to an assessment of the fire hazard of a particular end use. You can determine flash points up to 400 °C using either standard mode for where the flash point is known or search mode for when it is not.Next
These models come equipped with calibrated brass test cup and cover with device for gas or electric ignition via manual trip-opening motor for procedures A and B. This International Standard is not applicable to water-borne paints and varnishes. Simultaneously, an ignition source is directed into the brass cup performing ignition attempts periodically until a flash inside the brass cup is recorded with the Flash-Point Temperature automatically being presented on the large display of the Pensky—Martens Closed-Cup Flash-Point Tester. Your Alert Profile lists the documents that will be monitored. Already Subscribed to this document. Procedure A is used for the determination of the flash point of paints and varnishes that do not form a surface film, unused lubricating oils and other petroleum products not covered by Procedure B.
Verfahren A gilt für Destillatkraftstoffe Diesel, Biodieselgemische, Heizöl und Flugturbinenkraftsto ff , neue und in Gebrauch befindliche Schmieröle, Lacke und Anstrichstoffe sowie andere homogene Flüssigkeiten, die nicht in den Anwendungsbereich von Verfahren B oder C fallen. You may delete a document from your Alert Profile at any time. Light the test flame and adjust to a diameter of 3,2 mm to 4,8 mm or enable the alternative ignition source. This International Standard describes three procedures, A, B and C, using the Pensky-Martens closed cup tester, for determining the flash point of combustible liquids, liquids with suspended solids, liquids that tend to form a surface film under the test conditions, biodiesel and other liquids in the temperature range of 40 °C to 370 °C. Because the F-scale thermometer used in this procedure is graduated in 5 °F increments, it is not possible to read it to the 2 °C equivalent increment of 3.
For specific warning statements, see 6. For this test, a test portion is introduced into a cup and a close-fitting lid is fitted to the top of the cup. The first application of the ignition source with the fresh test portion is recommended to be approximately 23 °C below the temperature at which a flash point was detected on the first application. Various models are ideal for the closed-cup flash point testing of biodiesel, diesel, heating fuels and oils, turbine fuels, kerosene, residual fuel oils, and other flammable fluids. The automatic model features a high response and accuracy flash detector and atmospheric pressure sensor, automatically correcting to standard pressure ±. Since a flash point of residual alcohol in biodiesel is difficult to observe by manual flash point techniques, automated apparatus with electronic flash point detection have been found suitable.Next
Cease stirring and apply the ignition source by operating the mechanism on the cover, that controls the shutter and ignition source, so that the source is lowered into the vapour space of the test cup in 0,5 s, left in its lowered position for 1 s, and quickly raised to its high position. Please first before subscribing to alerts. Procedure A is applicable to distillate fuels diesel, biodiesel blends, heating oil and turbine fuels , new and in-use lubricating oils, paints and varnishes, and other homogeneous liquids not included in the scope of Procedures B or C. The Flash Point is the lowest temperature at which a liquid sample vaporizes to form an ignitable mixture with air. Procedure B is applicable to residual fuel oils, cutback residua, used lubricating oils, mixtures of liquids with solids, liquids that tend to form a surface film under test conditions or are of such kinematic viscosity that they are not uniformly heated under the stirring and heating conditions of Procedure A. An ignition source is directed into the test cup at regular intervals with simultaneous interruption of the stirring until a flash is detected. For residual fuels, precision has not been determined for flash points above 100 °C.Next