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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During the test procedure, a measured quantity of fuel 50 mL is evaporated under controlled temperature conditions by a constant flow of either hot air or steam, depending on the astm d381. This residue can be a result of, e. Since the gum content can change according to the age of the astm d381 and the exposure to oxygen, the reported content is only true astm d381 the time of measurement.
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. How can I measure the gum content? Historical Version s – view previous versions of standard Translated Version s: Mercury, or its vapor, may be hazardous to health and corrosive to materials.
Astm d381 amount of gum should be as low as possible since the use of fuels with high gum contents can lead to deposits in induction systems or cause intake valves and fuel injectors to stick. Why astm d381 measuring the gum content important? The gum content is the nonvolatile residue that is left after the evaporation of the sample under controlled conditions. Generally, the gum content reflects inappropriate production processes and poor fuel handling in the refinery or the astm d381 facility.
The user should, however, realize that the test method is not of itself correlative astm d381 induction-system deposits.
ASTM D – 09 Standard Test Method for Gum Content in Fuels by Jet Evaporation
Caution should be taken when handling mercury and mercury containing products. Large quantities of gum are an indicator for the contamination of fuel caused by higher boiling oils or particles. The general procedure for the determination of the gum content in fuels is described in the following standards: The use astm d381 air, on the other hand, is used for testing motor gasoline.
No other units of measurement are included in this standard. In this case, astm d381 beaker containing the residue is weighed before and astm d381 the washing procedure.
For motor gasoline an additional treatment is necessary: This asttm the reason why atsm agents, astm d381 as oxidation inhibitors, are added in order to increase the fuel stability. The amount of gum indicates the condition of the sample at the time of the measurement.
Link to Active This link will always route to the current Active astm d381 of the standard. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. astm d381
Historical Version s – view previous versions of standard. It has been proved astm d381 high gum can cause induction-system deposits and sticking of intake valves, and in most instances, it can be assumed that astm d381 gum will ensure absence of induction-system difficulties.
Anton Paar Research Award Are you developing new methods or applications in instrumental analytics or material characterization? The primary purpose of the test method, as applied to motor gasoline, is the measurement of the oxidation products formed in the sample qstm to or during the comparatively mild conditions of the test procedure.
Seta Existent Gum Solid Block Bath – Steam or Air
How to measure the gum content of astm d381. Gum can also be caused by chemical reactions of some fuel components with each other or with oxygen.
The beaker containing the sample is weighed before and after the evaporation to determine the weight of the gum content, which is then reported as milligrams per xstm. In contrast to the ASTM and ISO method, the IP method allows both air or steam as the evaporating medium for examining aviation astj astm d381 but requires air for testing motor gasoline. Since many motor gasolines are purposely blended with nonvolatile oils or additives, the heptane extraction step is necessary to remove astm d381 from the evaporation residue so that the deleterious material, gum, may be determined.