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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The gum content is the nonvolatile residue asm is left after the evaporation of the sample under controlled conditions. 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. What is the gum content?
The amount of gum should be as low as xstm 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. The user should, however, realize that the test method is not of itself correlative to induction-system deposits.
For motor gasoline an additional treatment is necessary: For specific warning statements, see 6.
ASTM D – 00 Standard Test Method for Gum Content in Fuels by Jet Evaporation
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. 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.
In this case, the beaker containing the residue is weighed before and after the washing procedure. Gum can also be caused by chemical reactions of some fuel components with each other or with oxygen. The use x381 air, on the other hand, is used for testing motor gasoline.
The amount of gum indicates the condition of the sample at the time of the measurement. 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.
ASTM D – 12() Standard Test Method for Gum Content in Fuels by Jet Evaporation
The general procedure for the determination of the gum content in fuels is described in the following standards: 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. Mercury, or its vapor, may be hazardous to health and corrosive to materials. 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.
This website uses r381 to improve user experience. Link to Active This link will always route to the current Active version of the standard. Aatm 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 storage facility.
Density Redefined Anton Paar has once again redefined digital density measurement with the groundbreaking invention of a new measuring principle: The gum content can be used to judge the quality of various products.
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 mL.
The quality of different fuels, e. How can I measure the gum content?
Why is measuring the gum content important? How to measure the gum content of fuels. The residue is washed with heptane after the evaporation to remove any additives the gasoline was initially blended with.
Seta Existent Gum Solid Block Bath – Steam or Air
Anton Paar has once again redefined digital density measurement with the groundbreaking invention of a new measuring principle: 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.
No other units of measurement are included in this standard. This is the reason why stabilizing agents, such as oxidation inhibitors, are added in order to increase the fuel stability.
Historical Version s – view previous versions of standard. This residue can be a result of, e. Historical Version s – view astj versions of standard Translated Version s: 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 hot air or steam, depending on the sample.