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ASTM D2685-11(2019)

Current Reaffirmation

Standard Test Method for Air and Carbon Tetrafluoride in Sulfur Hexafluoride by Gas Chromatography

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1.1 This test method covers the determination of air (Note 1) and carbon tetrafluoride as impurities in sulfur hexafluoride.

Note 1: Nitrogen, oxygen, or any of their mixtures is considered to be air. Commercial grade air or nitrogen is used for standardization.

1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


4.1 Air and carbon tetrafluoride (CF4) are two contaminants of interest in sulfur hexafluoride (SF6). Both of these contaminants adversely affect the performance of SF6 when used as an electrical insulating gas. Specification for maximum levels of these contaminants are given in Specification D2472.

4.2 Gas chromatography is used to separate these contaminants from a sample of SF6 and to determine their concentration.

SDO ASTM: ASTM International
Document Number D2685
Publication Date Oct. 1, 2019
Language en - English
Page Count 3
Revision Level 11(2019)
Supercedes
Committee D27.03
Publish Date Document Id Type View
May 1, 2011 D2685-11 Revision
Oct. 1, 2019 D2685-11R19 Reaffirmation
May 10, 1998 D2685-95R98 Reaffirmation
Sept. 10, 1995 D2685-95R03 Reaffirmation