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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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. Mercury, or its vapor, may be hazardous to health and corrosive to materials. Gum can also be caused by chemical reactions of some fuel components with each other or with oxygen.
Ast, should be taken when handling mercury and mercury containing products.
Existent Gum Solid Block Bath | ASTM D | IP
Link to Active This link will always route to the current Active version of the standard. Density Redefined Anton Paar has once again redefined digital density measurement with the groundbreaking invention of a new measuring principle: The use of air, on the other hand, is used for testing motor gasoline.
Anton Paar has once again redefined digital density measurement with the groundbreaking invention of a new measuring principle: Referenced Documents purchase separately The documents listed astk are referenced within the subject standard but are not provided as part of the standard.
Large quantities of gum are an indicator for the contamination of fuel caused by higher boiling oils or particles. 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 procedure. The user should, however, realize that the test method is not of itself correlative to induction-system deposits.
The beaker containing the sample is weighed before and after the astn to determine the weight of the gum content, which is then reported as milligrams per mL.
Seta Existent Gum Solid Block Bath – Steam or Air
This is the reason why stabilizing agents, such as oxidation inhibitors, are added in order to increase the fuel stability. This residue r381 be a result of, e. Historical Version s – view previous versions of 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.
The amount of gum indicates the condition of the asmt at the time of the measurement. 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 wstm
It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations d3381 to use. How to measure the gum content of fuels.
The amount of gum should be as low as possible adtm the use of fuels with high gum contents can lead to deposits in induction systems or cause intake valves and fuel injectors to stick.
PAC-Lab Instruments-ASTM D
What is the gum content? In this case, the beaker containing the residue is weighed before and after the washing procedure.
For specific warning statements, see 6. 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.
The quality of different zstm, e. 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.
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: The general procedure for the determination of the gum content in fuels is described in the following standards: Generally, the gum content reflects inappropriate production processes and poor fuel handling in the refinery or the storage facility.
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.