ASTM F2138-09
(Specification)Standard Specification for Excess Flow Valves for Natural Gas Service
Standard Specification for Excess Flow Valves for Natural Gas Service
ABSTRACT
This specification covers requirements and test methods for excess flow valves for natural gas piping systems. Tests methods requirements shall determine the performance characteristics of an excess flow valve installed in a straight piece of pipe. Excess flow valves shall conform to specified materials, dimensions, maximum inlet pressure, temperature rating range, and design requirements. It shall be tested with the following performance requirements: trip flow, leak rate, bypass flow, pressure drop, reset parameters, snap acting loads, and cycle testing.
SCOPE
1.1 This specification covers requirements and test methods for excess flow valves for use in thermoplastic natural gas piping systems. However, it is expected that excess flow valves manufactured to the requirements of this specification may also be used in other natural gas piping systems.
1.2 Excess flow valves covered by this specification are designed for insertion into components for natural gas systems such as pipe, tubing, or fittings in sizes from 1/2 CTS to 2 IPS.
1.3 The tests required by this specification are intended to determine the performance characteristics of an excess flow valve installed in a straight piece of pipe. An excess flow valve could possibly be installed in a straight piece of pipe, in a service tee outlet, as part of a mechanical coupling, or in other configurations. The performance characteristics of the excess flow valve may be significantly different for each installed configuration. Users should conduct their own tests to determine the installed performance characteristics or contact the EFV manufacturer for test data for the installed configuration. Additional guidance on selection and installation of excess flow valves is included in Appendix X1.
1.4 The tests required by this specification are not intended to be routine quality control tests.
1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.6 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 requirements prior to use.
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An American National Standard
Designation: F2138 – 09
Standard Specification for
1
Excess Flow Valves for Natural Gas Service
This standard is issued under the fixed designation F2138; 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* D1600 Terminology for Abbreviated Terms Relating to
Plastics
1.1 This specification covers requirements and test methods
F412 Terminology Relating to Plastic Piping Systems
for excess flow valves for use in thermoplastic natural gas
F1802 Test Method for Performance Testing of Excess
piping systems. However, it is expected that excess flow valves
Flow Valves
manufacturedtotherequirementsofthisspecificationmayalso
be used in other natural gas piping systems.
3. Terminology
1.2 Excess flow valves covered by this specification are
3.1 Definitions of Terms:
designed for insertion into components for natural gas systems
3.1.1 Definitions are in accordance with Terminology F412,
such as pipe, tubing, or fittings in sizes from 1/2 CTS to 2 IPS.
unless otherwise specified. Abbreviations are in accordance
1.3 The tests required by this specification are intended to
with Terminology D1600.
determine the performance characteristics of an excess flow
3.1.2 bypass flow, n—an intentional rate of passage of
valve installed in a straight piece of pipe.An excess flow valve
natural gas through an EFVB after trip, which will allow
could possibly be installed in a straight piece of pipe, in a
upstream and downstream pressure to equalize across the
service tee outlet, as part of a mechanical coupling, or in other
device to automatically reset to the open position after removal
configurations. The performance characteristics of the excess
of a fault condition.
flow valve may be significantly different for each installed
3.1.3 excess flow valve, EFV, n—a device installed in a
configuration. Users should conduct their own tests to deter-
natural gas piping system to automatically stop or limit the
mine the installed performance characteristics or contact the
passage of natural gas when the rate of passage of natural gas
EFV manufacturer for test data for the installed configuration.
through the device exceeds a predetermined level.
Additional guidance on selection and installation of excess
3.1.4 excess flow valve bypass, EFVB, n—an EFV designed
flow valves is included in Appendix X1.
to limit the flow of gas after trip to a small predetermined level
1.4 The tests required by this specification are not intended
and to reset automatically after the pressure is equalized across
to be routine quality control tests.
the valve.
1.5 The values stated in inch-pound units are to be regarded
3.1.5 excess flow valve non-bypass, EFVNB, n—an EFV
as standard. The values given in parentheses are mathematical
designed to stop the flow of gas after trip and to be reset
conversions to SI units that are provided for information only
manually.
and are not considered standard.
3.1.6 leak rate, n—the flow of natural gas through an
1.6 This standard does not purport to address all of the
EFVNB after trip.
safety concerns, if any, associated with its use. It is the
3.1.7 maximum inlet pressure, n—the maximum pressure,
responsibility of the user of this standard to establish appro-
as stated by the EFV manufacturer, at which an EFV is
priate safety and health practices and determine the applica-
designed to function.
bility of regulatory requirements prior to use.
3.1.8 minimum inlet pressure, n—the minimum pressure, as
2. Referenced Documents stated by the EFV manufacturer, at which an EFV is designed
2
to function.
2.1 ASTM Standards:
3.1.9 pipe, n—refers to both pipe and tubing.
3.1.10 reset, v—changing an EFV from a closed position to
1
This specification is under the jurisdiction ofASTM Committee F17 on Plastic
an open position.
Piping Systems and is the direct responsibility of Subcommittee F17.60 on Gas.
3.1.11 temperature rating, n—the temperature range, as
Current edition approved March 1, 2009. Published April 2009. Originally
´1
stated by the EFV manufacturer, within which an EFV is
approved in 2001. Last previous edition approved in 2001 as F2138–01 . DOI:
10.1520/F2138-09.
designed to function.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3.1.12 trip, n—closure of an EFV.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA
...
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.
An American National Standard
´1
Designation:F2138–01 Designation: F 2138 – 09
Standard Specification for
1
Excess Flow Valves for Natural Gas Service
This standard is issued under the fixed designation F 2138; 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
´ NOTE—Section 15 was added editorially revised in December 2002.
1. Scope*
1.1 This specification covers requirements and test methods for excess flow valves for use in thermoplastic natural gas piping
systems. However, it is expected that excess flow valves manufactured to the requirements of this specification may also be used
in other natural gas piping systems.
1.2 Excess flow valves covered by this specification are designed for insertion into components for natural gas systems such
as pipe, tubing, or fittings in sizes from 1/2 CTS to 2 IPS.
1.3 The tests required by this specification are intended to determine the performance characteristics of an excess flow valve
installed in a straight piece of pipe. An excess flow valve could possibly be installed in a straight piece of pipe, in a service tee
outlet, as part of a mechanical coupling, or in other configurations. The performance characteristics of the excess flow valve may
be significantly different for each installed configuration. Users should conduct their own tests to determine the installed
performance characteristics or contact the EFV manufacturer for test data for the installed configuration. Additional guidance on
selection and installation of excess flow valves is included in Appendix X1.
1.4 The tests required by this specification are not intended to be routine quality control tests.
1.5The values given in parentheses are for informational purposes only.
1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.6 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
requirements prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
D 1600 Terminology for Abbreviated Terms Relating to Plastics
F 412 Terminology Relating to Plastic Piping Systems
F 1802 Test Method Forfor Performance Testing of Excess Flow Valves
3. Terminology
3.1 Definitions of Terms:
3.1.1 Definitions are in accordance with Terminology F 412, unless otherwise specified. Abbreviations are in accordance with
Terminology D 1600.
3.1.2 bypass flow, n—an intentional rate of passage of natural gas through an EFVB after trip, which will allow upstream and
downstream pressure to equalize across the device to automatically reset to the open position after removal of a fault condition.
3.1.3 excess flow valve, EFV, n—a device installed in a natural gas piping system to automatically stop or limit the passage of
natural gas when the rate of passage of natural gas through the device exceeds a predetermined level.
3.1.4 excess flow valve bypass, EFVB, n— an EFV designed to limit the flow of gas after trip to a small predetermined level
and to reset automatically after the pressure is equalized across the valve.
3.1.5 excess flow valve non-bypass, EFVNB, n—an EFV designed to stop the flow of gas after trip and to be reset manually.
3.1.6 leak rate, n—the flow of natural gas through an EFVNB after trip.
1
This specification is under the jurisdiction of ASTM Committee F17 on Plastic Piping Systems and is the direct responsibility of Subcommittee F17.60 on Gas.
Current edition approved Sept. 10, 2001. Published October 2001.
´1
Current edition approved March 1, 2009. Published April 2009. Originally approved in 2001. Last previous edition approved in 2001 as F2138–01 .
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
, Vol 08.01.volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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