ASTM D36 · ASTM D56 · ASTM D86 · ASTM D92 · ASTM D93 · ASTM D97 · ASTM D · ASTM D · ASTM D · HGT / Gum Testers · HGT 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. ASTM D(). Standard Test Method for Gum Content in Fuels by Jet Evaporation. standard by ASTM International, 07/01/ View all product details.
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In this case, the beaker containing the residue is weighed before and after the washing procedure.
Historical Version s – view previous versions of standard. What astmm the gum content? Mercury, or its vapor, may be hazardous to health and corrosive to materials.
The amount of gum indicates the condition of the sample at the time of the measurement. The gum content is the nonvolatile residue that is left after the evaporation of the sample under controlled conditions. Historical Version s – view previous versions of standard Translated Version s: With respect to aviation turbine fuels, large quantities of gum are indicative of contamination of fuel by higher boiling oils or particulate matter and generally reflect poor handling practices in distribution downstream of the refinery.
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. Link to Active This link will always route to the current Active version of the standard.
The quality of different fuels, e. How can I measure the gum content? The beaker containing the xstm is weighed before and after the evaporation to determine the weight of the gum content, which ast, then reported as milligrams per mL.
The residue is washed with heptane after the evaporation to remove any additives the gasoline was initially blended with. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Why is measuring the gum content important? The general procedure for the determination of the gum content in fuels is described in the following standards: 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 sample.
This residue can be a result of, e. 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.
Gum can also be caused by chemical reactions of some fuel components with each other or with oxygen. 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 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.
Density Redefined Ast, Paar has once again redefined digital density measurement with the groundbreaking invention of a new measuring principle: 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.
How to measure the gum content of fuels :: Anton Paar Wiki
Generally, the gum content reflects inappropriate production processes and poor fuel handling in the refinery or the storage facility. It has been proved that high gum can cause induction-system deposits and sticking of intake valves, and in most instances, it can be assumed that low gum will ensure absence of induction-system difficulties. For specific warning statements, see 6. The user should, however, realize that the test method is not of itself correlative to induction-system deposits.
Large quantities of gum are an indicator for the contamination of fuel caused by higher boiling oils or particles. 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. Caution should be taken when handling mercury and mercury containing products.