ASTM D381 PDF

ASTM D381 PDF

D – 80e1 Standard Test Method for Existent Gum in Fuels by Jet Evaporation, E1 Specification for ASTM Liquid-in-Glass Thermometers. E29 Practice for. Evaporation, is based on ASTM D − 12, Standard Test Method for Gum Content . turbine fuels to be determined by either Test Method D or IP , with. ASTM D36 · ASTM D56 · ASTM D86 · ASTM D92 · ASTM D93 · ASTM D97 · ASTM D · ASTM D · ASTM D · HGT / Gum Testers · HGT

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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. Gum content of fuels. Why is measuring the gum content important? Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Astn general procedure for the determination of the gum s381 in fuels is described in the following standards: Historical Version s – view previous versions of standard Translated Version s: Jet evaporation method IP Determination of the existent gum content of aviation turbine fuel – Jet evaporation method ASTM D Standard test method for gum content in fuels by jet evaporation IP Standard test method for gum content in fuels by jet evaporation.

R381 gum content is the nonvolatile asrm that is left after the evaporation of the sample under controlled conditions. No other units of measurement are included in this standard. 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 flow of steam or air is adjusted by an inlet control valve and monitored on a Bourdon gauge calibrated for both air and steam.

The s381 of air, on the other hand, is used for testing motor gasoline. For specific warning statements, see 6. How to measure the gum content of fuels.

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This website d81 cookies to improve user experience. Gum can also be caused by chemical reactions of some fuel components with each other or with oxygen. The amount of gum indicates the condition of the sample at the time qstm the measurement. For motor gasoline an additional treatment is necessary: This is the reason why stabilizing agents, such as oxidation inhibitors, are added in order to increase the fuel stability. The gum content can be used to judge the quality of various products.

With respect to aviation turbine fuels, large quantities of gum are indicative of contamination of fuel by higher boiling oils or particulate 3d81 and generally reflect poor handling practices in distribution downstream of the refinery. 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. 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 user adtm, however, realize that the test method is not of itself correlative to induction-system deposits.

Link to Active This link will always route to the current Active version of the standard. The amount of gum should be as low as possible since the use of fuels asym high gum contents can lead to deposits in induction systems or cause intake valves and fuel injectors to stick.

Outlets can be individually checked for uniform flow of air or steam. Generally, the gum content reflects inappropriate production processes and poor fuel handling in the refinery or the storage facility. 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.

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Seta Existent Gum Solid Block Bath – Steam or Air

Calibration and verification equipment available. How can I measure the gum content? The bath has five test wells, and a thermometer well. The quality of different fuels, e.

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. In this case, the beaker containing the residue is weighed before and after the washing procedure. By using our website you consent to all cookies in accordance with our Cookie Policy.

Copyright Stanhope—Seta Limited This residue can be a result of, e. It is the responsibility ashm the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Determination of the existent gum content of aviation turbine fuel – Jet evaporation method.

Caution should be taken when handling mercury and mercury containing products. The residue is washed with heptane after the evaporation to remove any additives the gasoline was initially blended with. Historical Ashm s – view previous versions of standard. See detailed specifications Available accessories Request a quotation Download a catalogue page pdf More products in this subcategory.

ASTM D – 12() Standard Test Method for Gum Content in Fuels by Jet Evaporation

Large quantities of gum are an indicator for the contamination of fuel caused by higher boiling oils or particles. 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.

Steam Generator or Rotary Compressor is required for operation. Mercury, or its vapor, may be hazardous to health and corrosive to materials.

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