ASTM-D2685 › Historical Revision Information
Standard Test Method for Air and Carbon Tetrafluoride in Sulfur Hexafluoride by Gas Chromatography
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Scope
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 and health practices and determine the applicability of regulatory limitations prior to use.
Significance and Use
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.
Gas chromatography is used to separate these contaminants from a sample of SF6 and to determine their concentration.
Keywords
air; carbon tetrafluoride; sulfur hexafluoride; Air analysis; Carbon tetrafluoride content; Electrical insulating gases--sulfur hexafluoride; Gas chromatography (GC)--insulating materials/applications; Impurities; Nitrogen content; Sulfur hexafluoride (electrical insulating gas)
To find similar documents by ASTM Volume:
10.03 (Electrical Insulating Liquids and Gases; Electrical Protective Equipment)
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Document Number
ASTM-D2685-11
Revision Level
2011 EDITION
Status
Superseded
Modification Type
Revision
Publication Date
May 1, 2011
Document Type
Test Method
Page Count
3 pages
Committee Number
D27.03