ASTM D2472 PDF

Permissions to reprint documents can be acquired through Copyright Clearance Center ASTM License Agreement Withdrawn Rationale: This practice covered the determination of the time from the initial mixing of the reactants of a thermosetting plastic composition to the time when solidification commences, under conditions approximating the conditions of use. This practice also provided a means for measuring the maximum temperature reached by a reacting thermosetting plastic composition, as well as the time from initial mixing to the time when this peak exothermic temperature is reached. It was limited to reacting mixtures exhibiting gel times greater than 5 min. Formerly under the jurisdiction of Committee D20 on Plastics, this practice was withdrawn in September in accordance with section Scope 1. This test method also provides a means for measuring the maximum temperature reached by a reacting thermosetting plastic composition, as well as the time from initial mixing to the time when this peak exothermic temperature is reached.

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More D However, this specification applies only to gas as purchased. Tests for water content, acidity hydrolyzable fluorides , noncondensable gas and carbon tetrafluoride content, and assay shall be performed and shall conform to the requirements specified. This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application.

ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date. Scope 1. However, the test methods referred to in this standard may be useful in the evaluation of in-service or used gas. Test Method D may be particularly helpful since many sulfur hexafluoride decomposition products are acidic. Test Method D should not be used to evaluate the total amount of sulfur hexafluoride decomposition nor to identify contaminant species.

This can only be done by gas chromatography and similar instrumental techniques. No other units of measurement are included in this standard.

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.

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More D This standard provides a useful first step in any field or laboratory investigation for geotechnical engineering purposes. Agencies that meet the criteria of Practice D are generally considered capable of competent and objective testing. Users of this test method are cautioned that compliance with Practice D does not in itself assure reliable testing. Reliable testing depends on several factors; Practice D provides a means for evaluating some of those factors. Scope 1.

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