ASTM D6231-11(2015)

Standard Specification for HFC-125 (Pentafluoroethane, C<inf>2</inf>HF<inf>5</inf>)

ABSTRACT
This specification covers the requirements for HFC-125 (pentafluoroethane, C2HF5) as a fire-fighting medium. It does not however address the fire-fighting equipment or hardware that employs HFC-125, the conditions of employing such equipment like hand helds, fixed installations, etc., or the storage and transportation of HFC-125. Samples of HFC-125 taken in the liquid phase shall be taken from filled containers in accordance to a specific method and shall be tested for quality conformance using gas chromatography, sodium hydroxide titration, and Karl Fischer methods. HFC-125 shall conform to the purity, acidity, water content, nonvolatile residue, presence of fixed gases in the vapor phase, and suspended matter or sediment requirements when tested by the appropriate test methods.
SCOPE
1.1 This specification covers the requirements for HFC-125 as a fire-fighting medium.  
1.2 This specification does not address the fire-fighting equipment or hardware that employs HFC-125 or the conditions of employing such equipment, for example, hand helds, fixed installations, etc.  
1.3 This specification does not address the storage or transportation of HFC-125. Storage, handling, and transportation issues are addressed in Practice D6268.  
1.4 The values stated in both inch-pound and SI units are to be regarded separately as the standard. The values given in parentheses are for information only.  
1.5 The following safety hazards caveat pertains to the test methods portion, Section 6, of this specification. 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. Specific hazards statements are given in 4.3.

General Information

• Status: Historical
• Publication Date: 31-May-2015
• ICS: 13.220.10 - Fire-fighting
• ICS: 71.080.20 - Halogenated hydrocarbons
• Technical Committee: D26 - Halogenated Organic Solvents and Fire Extinguishing Agents
• Drafting Committee: D26.09 - Fire Extinguishing Agents

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D6231 −11 (Reapproved 2015)
Standard Specification for
HFC-125 (Pentafluoroethane, C HF )
2 5
This standard is issued under the fixed designation D6231; 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.
1. Scope 2.3 AHRI Standards:
2008 Appendix C Analytical Procedures for ARI Standard
1.1 This specification covers the requirements for HFC-125
700-2006
as a fire-fighting medium.
2.4 U.S. Government Standards:
1.2 This specification does not address the fire-fighting
Code of Federal Regulations (CFR) Title 49, Part 172.101,
equipment or hardware that employs HFC-125 or the condi-
Tables of Hazardous Materials and Special Provisions
tions of employing such equipment, for example, hand helds,
Code of Federal Regulations (CFR) Title 49, Part 172
fixed installations, etc.
Subpart D, Marking Requirements of Packaging for
1.3 This specification does not address the storage or Transportation
transportation of HFC-125. Storage, handling, and transporta- 2.5 American Society of Refrigerating Engineers:
tion issues are addressed in Practice D6268.
ASRE Standard 34, Designation of Refrigerants
1.4 The values stated in both inch-pound and SI units are to
3. Terminology
be regarded separately as the standard. The values given in
3.1 Definitions of Terms Specific to This Standard:
parentheses are for information only.
3.1.1 halogenated hydrocarbon, n—the halogenated com-
1.5 The following safety hazards caveat pertains to the test
pound coding terminology system provides a convenient
methods portion, Section 6, of this specification. This standard
means to reference halogenated hydrocarbons (see ASRE 34).
does not purport to address all of the safety concerns, if any,
Halogenated hydrocarbons are saturated hydrocarbons in
associated with its use. It is the responsibility of the user of this
which one or more of the hydrogen atoms have been replaced
standard to establish appropriate safety and health practices
byatomsofthehalogenseries:fluorine,chlorine,bromine,and
and determine the applicability of regulatory limitations prior
iodine. It is convention to prefix the number with an abbrevia-
to use. Specific hazards statements are given in 4.3.
tion of the compound:
2. Referenced Documents
CFC = chlorofluorocarbon
HCFC = hydrochlorofluorocarbon
2.1 ASTM Standards:
HFC = hydrofluorocarbon
D6268 Practice for Handling,Transportation, and Storage of
FC = fluorocarbon
HFC-125, Pentafluoroethane (C HF )
2 5
R = refrigerant
D6806 Practice for Analysis of Halogenated Organic Sol-
vents and Their Admixtures by Gas Chromatography
3.1.1.1 Discussion—By definition, the right–most digit of
the numbering system is the number of fluorine atoms. The
2.2 ISO Standards:
second digit from the right is the number of hydrogen atoms
ISO 3427 Gaseous Halogenated Hydrocarbons (Liquefied
plusone(+1).Thethirddigitfromtherightisoneless(-1)than
Gases) – Taking a Sample
number of carbon atoms in the compound (when this number
is zero (0) it is omitted from the number). Unaccounted for
valance requirements are assumed to be chlorine atoms. When
This specification is under the jurisdiction of ASTM Committee D26 on
thecompoundcontainsbromineoriodine,thesamerulesapply
Halogenated Organic Solvents and Fire Extinguishing Agentsand is the direct
except the letter “B” for bromine or “I” for iodine follows the
responsibility of Subcommittee D26.09 on Fire Extinguishing Agents.
Current edition approved June 1, 2015. Published June 2015. Originally
approved in 1998. Last previous edition approved in 2011 as D6231-11. DOI:
10.1520/D6231-11R15. Available from the Air Conditioning, Heating and Refrigeration Institute
For referenced ASTM standards, visit the ASTM website, www.astm.org, or (AHRI), 2111 Wilson Blvd., Suite 500, Arlington, VA, 22201, http://
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM www.ahrinet.org.
Standards volume information, refer to the standard’s Document Summary page on Available from U.S. Government Publishing Office, 732 N. Capitol St., NW,
the ASTM website. Washington, DC 20401-0001, http://www.gpo.gov.
3 6
Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St., Available from American Society of Refrigeration Engineers, Refrigeration
4th Floor, New York, NY 10036, http://www.ansi.org. Engineering 65, 49 (1957).
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D6231−11 (2015)
parent compound designated number and the number of the during periods of elevated adrenaline could produce cardiac
atoms is placed after the letter. arrhythmia in some personnel.)
4.4 Unless otherwise specified, Type I is assumed.
Example:C HF 5 R 2 125 5 HFC 2 125 (1)
2 5
3.1.2 HFC-125, n—the compound pentafluoroethane;
5. Sampling
C HF .
2 5
5.1 Samples of HFC-125 taken from the liquid phase, shall
be taken from filled containers in accordance with the method
4. Material Requirements
specified in ISO 3427. The sampling bottle shall be capable of
4.1 Type I:
safely resisting the vapor pressure of the sample at the highe
...

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: D6231 − 11 D6231 − 11 (Reapproved 2015)
Standard Specification for
HFC-125 (Pentafluoroethane, C HF )
2 5
This standard is issued under the fixed designation D6231; 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.
1. Scope
1.1 This specification covers the requirements for HFC-125 as a fire–fightingfire-fighting medium.
1.2 This specification does not address the fire–fightingfire-fighting equipment or hardware that employs HFC-125 or the
conditions of employing such equipment, for example, hand helds, fixed installations, etc.
1.3 This specification does not address the storage or transportation of HFC-125. Storage, handling, and transportation issues
are addressed in Practice D6268.
1.4 The values stated in both inch-pound and SI units are to be regarded separately as the standard. The values given in
parentheses are for information only.
1.5 The following safety hazards caveat pertains to the test methods portion, Section 6, of this specification.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. Specific
hazards statements are given in 4.3.
2. Referenced Documents
2.1 ASTM Standards:
D6268 Practice for Handling, Transportation, and Storage of HFC-125, Pentafluoroethane (C HF )
2 5
D6806 Practice for Analysis of Halogenated Organic Solvents and Their Admixtures by Gas Chromatography
2.2 ISO Standards:
ISO 3427 Gaseous Halogenated Hydrocarbons (Liquefied Gases) – Taking a Sample
2.3 ARIAHRI Standards:
2008 Appendix C Analytical Procedures for ARI Standard 700-2006
2.4 U.S. Government Standards:
Code of Federal Regulations (CFR) Title 49, Part 172.101, Tables of Hazardous Materials and Special Provisions
Code of Federal Regulations (CFR) Title 49, Part 172 Subpart D, Marking Requirements of Packaging for Transportation
2.5 American Society of RefrigerationRefrigerating Engineers:
ASRE Standard 34, Designation of Refrigerants
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 halogenated hydrocarbon, n—the halogenated compound coding terminology system provides a convenient means to
reference halogenated hydrocarbons (see ASRE 34). Halogenated hydrocarbons are saturated hydrocarbons in which one or more
This specification is under the jurisdiction of ASTM Committee D26 on Halogenated Organic Solvents and Fire Extinguishing Agentsand is the direct responsibility of
Subcommittee D26.09 on Fire Extinguishing Agents.
Current edition approved Jan. 1, 2011June 1, 2015. Published August 2011June 2015. Originally approved in 1998. Last previous edition approved in 20032011 as
D6231D6231-1998(2003).-11. DOI: 10.1520/D6231-11.10.1520/D6231-11R15.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Available from American National Standards Institute, 11 W. 42nd St., 13thInstitute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036.10036, http://www.ansi.org.
Available from the Air Conditioning, Heating and Refrigeration Institute, 4100 North Fairfax Drive, Suite 200, Arlington, VA, 22203-1678. Institute (AHRI), 2111 Wilson
Blvd., Suite 500, Arlington, VA, 22201, http://www.ahrinet.org.
Available from Superintendent of Documents, U.S. Government Printing Office, Washington, DC 20036.Publishing Office, 732 N. Capitol St., NW, Washington, DC
20401-0001, http://www.gpo.gov.
Available from American Society of Refrigeration Engineers, Refrigeration Engineering 65, 49 (1957).
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D6231 − 11 (2015)
of the hydrogen atoms have been replaced by atoms of the halogen series: fluorine, chlorine, bromine, and iodine. It is convention
to prefix the number with an abbreviation of the compound:
CFC = chlorofluorocarbon
HCFC = hydrochlorofluorocarbon
HFC = hydrofluorocarbon
FC = fluorocarbon
R = refrigerant
3.1.1.1 Discussion—
By definition, the right–most digit of the numbering system is the number of fluorine atoms. The second digit from the right is the
number of hydrogen atoms plus one (+1). The third digit from the right is one less (-1) than number of carbon atoms in the
compound (when this number is zero (0) it is omitted from the number). Unaccounted for valance requirements are assumed to
be chlorine atoms. When the compound contains bromine or iodine, the same rules apply except the letter “B” for bromine or “I”
for iodine follows the parent compound designated number and the number of the atoms is placed after the letter.
Example:C HF 5 R2 125 5 HFC 2 125 (1)
2 5
3.1.2 HFC-125, n—the compound pentafluoroethane; C HF .
2 5
4. Material Requirements
4.1 Type I:
4.1.1 The nitrogen (N ) partial pressure shall be such that the safe working pressure of the receiving vessel is not exceeded. To
prevent excessive pressure, the fill density of the HFC-125/nitrogen within the container should not exce
...