ASTM D381 PDF

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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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Density Redefined Anton Paar has once again redefined digital density measurement with the groundbreaking invention of a new measuring principle: Gum can also be caused by chemical r381 of some fuel components with each other or with oxygen.

How can I measure the gum content?

The residue is washed with heptane after the evaporation to remove any additives the gasoline was initially blended with. This is the reason why stabilizing agents, such as oxidation inhibitors, are added in order to increase the fuel stability.

This website uses cookies to improve user experience. 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.

How to measure the gum content of fuels :: Anton Paar Wiki

The use of air, on the other hand, is used for testing motor gasoline. How to measure the gum content of fuels. Large quantities of gum are an indicator for the contamination of fuel caused by higher boiling oils or particles.

For motor gasoline an additional treatment is necessary: 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. Mercury, or astmm vapor, may be hazardous to health and corrosive to materials.

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The amount of gum indicates the condition of the sample at the time of the measurement. 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 evaporation to determine the weight of the gum content, which is then reported as milligrams per mL.

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. Why is measuring the gum content important? No other units of measurement are included in this standard. Historical Version s – view previous versions of standard Translated Version s: 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.

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.

The gum content is the nonvolatile residue that is left after the evaporation of the sample under controlled conditions. 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.

By using our website you consent to all cookies in accordance with our Cookie Policy. Generally, the gum content reflects inappropriate production processes and poor fuel handling in the refinery or the storage facility. Anton Paar has once again redefined digital density measurement with the groundbreaking invention of a new measuring principle: What is the gum content? Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

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For specific warning statements, see 6. Historical Version s – view previous versions of f381. Caution should be taken when handling mercury and mercury containing products. The quality of different fuels, e.

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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. 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.

The general procedure for the determination of the gum content in fuels is described in the following standards: In this case, the beaker containing the residue is weighed before and after the washing procedure. This residue can be a result of, e. The gum content can be used to judge the quality of various products.

Since the asgm 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.