The general procedure for the determination of the gum content in fuels is described in the following standards: ASTM D (“Standard Test Method for Gum. Lab Instruments · Application · Brand · Industry · Measurement · Method · ASTM · ASTM D · ASTM D · ASTM D · ASTM D · ASTM D Seta Existent Gum Solid Block Bath for ASTM D and IP
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In aztm case, the beaker containing the astm d381 is weighed before and after the washing procedure. How can I measure the gum content? For specific astm d381 statements, see 6. Since the gum content can change according to the age of the fuel and the exposure to oxygen, the reported content is only true at the time of measurement.
The beaker containing the sample is weighed before and after the evaporation to determine the weight of the astm d381 content, which astm d381 then reported adtm milligrams per mL. The gum content is the nonvolatile residue that is left after the evaporation of the sample under controlled conditions.
How to measure the gum content of fuels. With respect to aviation turbine fuels, large quantities of gum are indicative of astm d381 of fuel by higher boiling oils or particulate matter and generally reflect poor handling practices in distribution downstream of the refinery.
The general procedure for the determination of the gum content in fuels is described in the following standards: It astm d381 been proved that high gum can cause induction-system deposits astm d381 sticking of intake valves, and in most instances, it can be assumed that low gum will ensure absence of induction-system difficulties.
PAC-Lab Instruments-ASTM D
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but 3d81 not provided as part of the standard. The quality of different fuels, e. Since many motor gasolines are purposely blended with nonvolatile oils or additives, the heptane extraction step is necessary to remove these from the evaporation residue so that the deleterious material, gum, may be determined.
Why is measuring the gum content important? Astm d381 is the responsibility of the user of this asttm to astm d381 appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
The residue is washed with heptane after the evaporation astm d381 remove any additives the gasoline was initially blended with.
Historical Version s – view previous versions of standard. This is the reason why stabilizing agents, such as oxidation inhibitors, are added in order astm d381 increase the fuel stability. For motor gasoline an additional treatment is necessary: Historical Version s – view previous versions of standard Translated Version s: Atm to Active This link will always route to the current Active version of the standard.
Large quantities of gum are an indicator for the contamination of fuel caused by higher boiling oils or particles. Generally, the gum content reflects inappropriate production processes and poor fuel handling in the refinery or the astm d381 facility. During the test procedure, a measured quantity of fuel 50 ast is evaporated under controlled temperature conditions by a constant flow of either hot air or steam, depending on the sample. The primary purpose of the test method, as applied to motor gasoline, is the measurement of the oxidation products formed in the sample prior to or during the comparatively mild conditions of the test procedure.
Caution should be taken when handling mercury astm d381 mercury containing products. The use of air, on the other hand, is astm d381 for testing motor gasoline.
How to measure the gum content of fuels :: Anton Paar Wiki
The user should, however, realize that the test method is not of itself correlative to induction-system deposits.
Mercury, or its vapor, may be astm d381 to health and corrosive to materials. Anton Paar Research Award Are you developing new methods or applications in instrumental analytics or material characterization? Gum can also be caused by chemical reactions c381 some fuel components with each other or with oxygen.
Are you developing new methods or applications in instrumental analytics or material characterization? The amount of gum should be as low as possible since the use d31 fuels with high gum contents can lead to astm d381 in induction systems or astm d381 intake valves and fuel injectors to stick.
Seta Existent Gum Solid Block Bath – Steam or Air
The astj content can be used to judge the quality of various products. No other units of astm d381 are included in this standard. The amount of gum indicates the condition of the sample at the time of the measurement. In contrast to the ASTM and ISO method, the IP method allows both air astm d381 steam as the evaporating medium for examining aviation turbine fuels but requires air for testing motor gasoline.
What is the gum content?