ASTM D2472-00(2006)

Standard Specification for Sulfur Hexafluoride

ABSTRACT
This specification covers the requirements for sulfur hexafluoride intended for use as an electrical insulating gas. 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.
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 D 2284 may be particularly helpful since many sulfur hexafluoride decomposition products are acidic. Test Method D 2284 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.

General Information

• Status: Historical
• Publication Date: 31-Mar-2006
• ICS: 71.060.50 - Salts
• Technical Committee: D27 - Electrical Insulating Liquids and Gases
• Drafting Committee: D27.02 - Gases and Non-Mineral Oil Liquids

Relations

• Replaces: ASTM D2472-00 - Standard Specification for Sulfur Hexafluoride
• Effective Date: 01-Apr-2006
• Replaced By: ASTM D2472-00(2014) - Standard Specification for Sulfur Hexafluoride
• Effective Date: 01-Nov-2014
• Referred By: ASTM D2685-11(2019) - Standard Test Method for Air and Carbon Tetrafluoride in Sulfur Hexafluoride by Gas Chromatography
• Effective Date: 01-Apr-2006
• Referred By: ASTM D2029-97(2017) - Standard Test Methods for Water Vapor Content of Electrical Insulating Gases by Measurement of Dew Point
• Effective Date: 01-Apr-2006

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D2472 −00(Reapproved2006)
StandardSpecification for
Sulfur Hexafluoride
This standard is issued under the fixed designation D2472; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 4. Sampling
1.1 This specification applies to sulfur hexafluoride for use
4.1 Withdraw a sample of sulfur hexafluoride from either
as an electrical insulating gas.
the vapor space or liquid phase of the container.
NOTE 1—This specification is intended to apply only to gas as
4.2 For samples collected from the liquid phase the user
purchased. However, the test methods referred to in this standard may be
must ascertain whether or not the cylinder valve is attached to
useful in the evaluation of in-service or used gas.Test Method D2284 may
a dip tube. Sample cylinders equipped with a dip tube in an
be particularly helpful since many sulfur hexafluoride decomposition
upright position. Invert cylinders not equipped with a dip tube
products are acidic.Test Method D2284 should not be used to evaluate the
total amount of sulfur hexafluoride decomposition nor to identify con-
for sampling to ensure that the sample is obtained from the
taminant species. This can only be done by gas chromatography and
liquid phase of the cylinder.
similar instrumental techniques.
4.3 Analyses may be performed on vapor space samples for
1.2 This standard does not purport to address all of the
routine or preliminary testing. If the vapor phase analysis
safety concerns, if any, associated with its use. It is the
indicates that impurities are not within specification, a liquid
responsibility of the user of this standard to establish appro-
phase sample should be obtained and analysed. The liquid
priate safety and health practices and determine the applica-
phase comprises most of the material in the container and is
bility of regulatory limitations prior to use.
morerepresentativeoftheoverallcompositionoftheSF inthe
container. When a discrepancy exists between vapor and liquid
2. Referenced Documents
phase analyses, the liquid phase analysis shall govern, unless
2.1 ASTM Standards:
otherwise agreed to by purchaser-seller agreement.
D2029 Test Methods for Water Vapor Content of Electrical
Insulating Gases by Measurement of Dew Point
5. Precautions
D2284 Test Method for Acidity of Sulfur Hexafluoride
D2685 Test Method for Air and Carbon Tetrafluoride in 5.1 Refer to the section titled Interferences in Test Method
Sulfur Hexafluoride by Gas Chromatography D2029.
3. Detail Requirements
6. Test Methods
3.1 Sulfur hexafluoride for use as an electrical insulation
6.1 Water Content— Test Method D2029.
material shall conform to the requirements prescribed in Table
6.2 Hydrolyzable Fluorides—Determine the acidity, ex-
1.
pressed as HF, in accordance with Test Method D2284.
6.3 Air—Determine the amount of noncondensable gases,
...