1. Scope
1.1 This specification applies to sulfur hexafluoride for use as an electrical insulating gas.
NOTE 1 - This specification is intended to apply only to gas as purchased. However, the test methods referred to in this standard may be useful in the evaluation of in-service or used gas. Test Method D2284 may be particularly helpful since many sulfur hexafluoride decomposition products are acidic. Test Method D2284 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.
1.2 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.
2. Referenced Documents
2.1 ASTM Standards:
D2029 Test Methods for Water Vapor Content of Electrical Insulating Gases by Measurement of Dew Point
D2284 Test Method for Acidity of Sulfur Hexafluoride
D2685 Test Method for Air and Carbon Tetrafluoride in Sulfur Hexafluoride by Gas Chromatography
3. Detail Requirements
3.1 Sulfur hexafluoride for use as an electrical insulation material shall conform to the requirements prescribed in Table 1.
