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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What astm d381 the gum content? The gum content is the nonvolatile residue that is left after the evaporation of the sample under controlled conditions.
EXISTENT GUMS IN FUELS BY JET EVAPORATION ASTM D – ISO – IP – DIN NFM
This residue can be a result of, e. Why is measuring the gum content important? The quality of different fuels, e. Since many astm d381 gasolines are purposely blended with nonvolatile oils or additives, the heptane extraction step astm d381 necessary to remove these from the evaporation residue so that the deleterious material, gum, may be determined.
Since the gum content can change according astm d381 the age of the fuel and the exposure to oxygen, the reported content is only true at the time of measurement. How to measure the gum content of fuels.
Historical Version s astm d381 view previous versions of standard Translated Version s: Are you developing new methods or applications in instrumental analytics or material characterization? The general procedure for the determination of the gum content in fuels is described in the following standards: Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
No other units of measurement are included in this standard. 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 d81.
In contrast to the ASTM and ISO method, the IP method allows both air or steam as the evaporating medium for examining aviation turbine fuels but requires air for testing motor gasoline. The user should, astm d381, realize that the test method is not of itself correlative to induction-system deposits. Large astm d381 of gum are an indicator for the contamination of fuel caused by higher boiling oils or particles. Astm d381 has been proved that high gum astm d381 cause induction-system deposits d38 sticking of intake valves, and in most instances, it can be assumed that low gum will ensure absence of induction-system difficulties.
The amount of gum indicates the condition of the sample at the time of the measurement. With respect to aviation turbine fuels, large quantities of astm d381 are indicative of contamination of fuel by astm d381 boiling oils or particulate matter and generally reflect poor handling practices in distribution downstream of the refinery.
ASTM D – 09 Standard Test Method for Gum Content in Fuels by Jet Evaporation
The beaker containing the sample is weighed before and after the evaporation to determine the weight of the gum astm d381, which is then reported as milligrams per mL. Mercury, astm d381 its vapor, may be hazardous to health and corrosive to materials. The gum content can be used to judge the quality of various products.
Link to Active This link will always route to the current Active version of the standard. Astm d381, the gum content reflects inappropriate production processes and poor fuel handling in the refinery or the astm d381 facility.
Historical Astm d381 s – view previous versions of standard. In this case, the beaker containing the residue is weighed before and aztm the washing procedure. For motor gasoline an additional treatment is necessary: Astm d381 Paar Research Award Are you developing new methods or applications in instrumental analytics or material characterization?
How can I measure the gum content?
Seta Existent Gum Solid Block Bath – Steam or Air
The use of air, on the other hand, is used for testing motor gasoline. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. During the test procedure, a measured quantity of fuel 50 mL is evaporated under controlled temperature conditions by a constant flow of either astm d381 air or steam, depending on the sample.
The residue is washed with heptane after the evaporation astm d381 remove any additives astm d381 gasoline was initially blended with. For specific warning statements, see 6.
This is the reason why stabilizing agents, such as oxidation inhibitors, astm d381 added in order to increase the fuel stability. Caution should be taken when handling mercury and mercury containing products.