ASTM D2472-15

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 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 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.

General Information

• Status: Historical
• Publication Date: 30-Sep-2015
• 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(2014) - Standard Specification for Sulfur Hexafluoride
• Effective Date: 01-Oct-2015
• Refers: ASTM D2284-11(2019) - Standard Test Method for Acidity of Sulfur Hexafluoride
• Effective Date: 01-Dec-2019
• Refers: ASTM D2284-11 - Standard Test Method for Acidity of Sulfur Hexafluoride
• Effective Date: 01-May-2011
• Refers: ASTM D2685-11 - Standard Test Method for Air and Carbon Tetrafluoride in Sulfur Hexafluoride by Gas Chromatography
• Effective Date: 01-May-2011
• Refers: ASTM D2029-97(2008) - Standard Test Methods for Water Vapor Content of Electrical Insulating Gases by Measurement of Dew Point
• Effective Date: 01-Dec-2008
• Refers: ASTM D2029-97 - Standard Test Methods for Water Vapor Content of Electrical Insulating Gases by Measurement of Dew Point
• Effective Date: 10-Apr-1997
• Refers: ASTM D2029-97(2003) - Standard Test Methods for Water Vapor Content of Electrical Insulating Gases by Measurement of Dew Point
• Effective Date: 10-Apr-1997
• Refers: ASTM D2685-95(2003) - Standard Test Method for Air and Carbon Tetrafluoride in Sulfur Hexafluoride by Gas Chromatography
• Effective Date: 10-Sep-1995
• Refers: ASTM D2284-95(2002) - Standard Test Method for Acidity of Sulfur Hexafluoride (Withdrawn 2011)
• Effective Date: 15-Mar-1995
• Referred By: ASTM D2685-11(2019) - Standard Test Method for Air and Carbon Tetrafluoride in Sulfur Hexafluoride by Gas Chromatography
• Effective Date: 01-Oct-2015
• 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-Oct-2015

Standards Content (Sample)

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.
Designation:D2472 −15
Standard Specification for
1
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 U.S. 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 The values stated in SI units are to be regarded as
routine or preliminary testing. If the vapor phase analysis
standard. No other units of measurement are included in this
indicates that impurities are not within specification, a liquid
standard.
phase sample should be obtained and analysed. The liquid
1.3 This standard does not purport to address all of the
phase comprises most of the material in the container and is
safety concerns, if any, associated with its use. It is the
morerepresentativeoftheoverallcompositionoftheSF inthe
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responsibility of the user of this standard to establish appro-
container. When a discrepancy exists between vapor and liquid
priate safety and health practices and determine the applica-
phase analyses, the liquid phase analysis shall govern, unless
bility of regulatory limitations prior to use.
otherwise agreed to by purchaser-seller agreement.
2. Referenced Documents
5. Precautions
2
2.1 ASTM Standards:
5.1 Refer to the section titled Interferences in Test Method
D2029 Test Methods for Water Vapor Content of Electrical
D2029.
Insulating Gases by Measurement of Dew Point
D2284 Test Method for Acidity of Sulfur Hexafluoride
6. Test Methods
D2685 Test Method for Air and Carbon Tetrafluoride in
Sulfur Hexafluoride by Gas Chromatography
6.1 Water Content— Test Method D2029.
6.2 Hydrolyzable Fluorides—Determine the acidity, ex-
3. Detail Requirements
pressed as HF, in accordance with Test Method D2284.
3.1 Sulfur hexafluoride for use as an
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D2472 − 00 (Reapproved 2014) D2472 − 15
Standard Specification for
1
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 U.S. Department of Defense.
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 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.
2. Referenced Documents
2
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.
4. Sampling
4.1 Withdraw a sample of sulfur hexafluoride from either the vapor space or liquid phase of the container.
4.2 For samples collected from the liquid phase the user must ascertain whether or not the cylinder valve is attached to a dip
tube. Sample cylinders equipped with a dip tube in an upright position. Invert cylinders not equipped with a dip tube for sampling
to ensure that the sample is obtained from the liquid phase of the cylinder.
4.3 Analyses may be performed on vapor space samples for routine or preliminary testing. If the vapor phase analysis indicates
that impurities are not within specification, a liquid phase sample should be obtained and analysed. The liquid phase comprises
most of the material in the container and is more representative of the overall composition of the SF in the container. When a
6
discrepancy exists between vapor and liquid phase analyses, the liquid phase analysis shall govern, unless otherwise agreed to by
purchaser-seller agreement.
5. Precautions
5.1 Refer to the section titled Interferences in Test Method D2029.
1
This specification is under the jurisdiction of ASTM Committee D27 on Elec
...