ASTM D381 PDF

Published by on March 31, 2021
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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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The primary purpose of the test s381, 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. How can I measure the gum content? 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.

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. Since many motor gasolines are purposely blended with nonvolatile oils or additives, the heptane extraction step e381 necessary to remove these from the evaporation residue so that the deleterious material, gum, may be determined.

Gum can also be caused by chemical reactions of some fuel components with each other or with oxygen.

Why is measuring the gum content important? This website uses cookies to improve user experience. The general procedure for the determination of the gum content in fuels is described in the following standards: The residue is washed with heptane after the evaporation to remove any additives the gasoline was initially blended with. For motor gasoline an additional treatment is necessary: How to measure the gum content of fuels.

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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 ast, in distribution downstream of the refinery. 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.

This is the reason why stabilizing agents, such as oxidation inhibitors, are added in order to increase the fuel stability. The user should, however, realize that the test method is not of itself correlative to induction-system deposits.

Caution should be taken when handling mercury and mercury containing products. 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. Large quantities of gum are an indicator for astj contamination of fuel caused by higher boiling oils or particles.

The gum content is the nonvolatile residue that is left after the evaporation of the sample under controlled conditions. Mercury, or its vapor, may be hazardous to health and corrosive to materials.

Seta Existent Gum Solid Block Bath – Steam or Air

What is the gum content? Generally, the gum content reflects inappropriate production processes and poor fuel handling in the refinery or the storage facility. Link to Active This link will always route to the current Active version of the standard. E381 Version s – view previous versions of standard Translated Version s: This residue can be a result of, e.

Détail produit – EN – Normalab

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 sample at the time of the measurement. For specific warning statements, see 6.

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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. 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.

Historical Version s – view previous versions of standard. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. 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 quality of different fuels, e.

By using our website you consent to all cookies in accordance with our Cookie Policy. The use of air, on the other hand, is used for testing motor gasoline. No other units of measurement are included in this standard.

Xstm this case, the beaker containing the residue is weighed before and after the washing procedure. Anton Paar has once again redefined digital density measurement with the groundbreaking invention of a new measuring principle: