ASTM D5820-95(2018)
(Practice)Standard Practice for Pressurized Air Channel Evaluation of Dual-Seamed Geomembranes
Standard Practice for Pressurized Air Channel Evaluation of Dual-Seamed Geomembranes
SIGNIFICANCE AND USE
5.1 The increased use of geomembranes as barrier materials to restrict liquid or gas movement, and the common use of dual-track seams in joining these sheets, has created a need for a standard nondestructive test by which the quality of the seams can be assessed for continuity and watertightness. The test is not intended to provide any indication of the physical strength of the seam.
5.2 This practice recommends an air pressure test within the channel created between dual-seamed tracks whereby the presence of unbonded sections or channels, voids, nonhomogenities, discontinuities, foreign objects, and the like, in the seamed region can be identified.
5.3 This technique is intended for use on seams between geomembrane sheets formulated from the appropriate polymers and compounding ingredients to form a plastic or elastomer sheet material that meets all specified requirements for the end use of the product.
SCOPE
1.1 This practice covers a nondestructive evaluation of the continuity of parallel geomembrane seams separated by an unwelded air channel. The unwelded air channel between the two distinct seamed regions is sealed and inflated with air to a predetermined pressure. Long lengths of seam can be evaluated by this practice more quickly than by other common nondestructive tests.
1.2 This practice should not be used as a substitute for destructive testing. Used in conjunction with destructive testing, this method can provide additional information regarding the seams undergoing testing.
1.3 This practice supercedes Practice D4437/D4437M for geomembrane seams that include an air channel. Practice D4437/D4437M may continue to be used for other types of seams. The user is referred to the referenced standards, or to EPA/530/SW-91/051 for additional information regarding geomembrane seaming techniques and construction quality assurance.
1.4 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5 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.
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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: D5820 − 95 (Reapproved 2018)
Standard Practice for
Pressurized Air Channel Evaluation of Dual-Seamed
Geomembranes
This standard is issued under the fixed designation D5820; 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. Referenced Documents
2.1 ASTM Standards:
1.1 This practice covers a nondestructive evaluation of the
D4437/D4437M Practice for Nondestructive Testing (NDT)
continuity of parallel geomembrane seams separated by an
for Determining the Integrity of Seams Used in Joining
unwelded air channel. The unwelded air channel between the
Flexible Polymeric Sheet Geomembranes
two distinct seamed regions is sealed and inflated with air to a
D4439 Terminology for Geosynthetics
predeterminedpressure.Longlengthsofseamcanbeevaluated
D4491/D4491M Test Methods for Water Permeability of
by this practice more quickly than by other common nonde-
Geotextiles by Permittivity
structive tests.
2.2 EPA Standard:
1.2 This practice should not be used as a substitute for
EPA/530/SW-91/051 Technical Guidance Document: In-
destructive testing. Used in conjunction with destructive spection Techniques for the Fabrication of Geomembrane
testing, this method can provide additional information regard- Field Seams
ing the seams undergoing testing.
3. Terminology
1.3 This practice supercedes Practice D4437/D4437M for
3.1 Definitions:
geomembrane seams that include an air channel. Practice
3.1.1 dual seam, n—a geomembrane seam with two parallel
D4437/D4437M may continue to be used for other types of
welded zones separated by an unwelded air space.
seams. The user is referred to the referenced standards, or to
3.1.2 Discussion—The dual seam itself can be made by a
EPA/530/SW-91/051 for additional information regarding
number of methods, the most common being the hot wedge
geomembrane seaming techniques and construction quality
technique. Other possible methods include hot air and ultra-
assurance.
sonic bonding techniques.
1.4 This standard does not purport to address all of the
3.1.3 geomembrane, n—anessentiallyimpermeablegeosyn-
safety concerns, if any, associated with its use. It is the
thetic composed of one or more synthetic sheets.
responsibility of the user of this standard to establish appro-
3.1.4 Discussion—In geotechnical engineering, “imperme-
priate safety, health, and environmental practices and deter-
able” essentially means that no measurable liquid flows
mine the applicability of regulatory limitations prior to use.
through a geosynthetic when tested in accordance with Test
1.5 This international standard was developed in accor-
Methods D4491/D4491M.
dance with internationally recognized principles on standard-
3.1.5 seam, n—a permanent joining of two or more materi-
ization established in the Decision on Principles for the
als.
Development of International Standards, Guides and Recom-
3.2 For definitions of other terms, see Terminology D4439.
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
4. Summary of Practice
4.1 This practice utilizes a dual seam where an air channel
exists between the two welded zones. Both ends of the air
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
This practice is under the jurisdiction of ASTM Committee D35 on Geosyn- contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
thetics and is the direct responsibility of Subcommittee D35.10 on Geomembranes. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Feb. 1, 2018. Published February 2018. Originally the ASTM website.
approved in 1995. Last previous edition approved in 2011 as D5820 – 95 (2011). Available from the Superintendent of Documents, U. S. Government Printing
DOI: 10.1520/D5820-95R18. Office, Washington, DC 20402.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D5820 − 95 (2018)
channel are sealed and then a pressure gauge is attached to the 7. Procedure
airspace.Airpressureisappliedandthegaugeismonitoredfor
7.1 After the dual-track seam is fabricated and the length of
excessive gauge air pressure drop.
seam that is to be evaluated is determined, seal off the two ends
4.2 Air pressures used in this practice are related to the of the continuous air channel.
thickness, stiffness, and material type of the geomembrane.
7.2 Connect the pressure gauge directly to the air channel.
4.3 The minimum monitoring time is recommended to be
7.3 Connect an air pump to the pressure gauge with a
2 min following stabilization of the pressure.
flexible hose via a quick connect and pressurize the air channel
4.4 Maximum allowable loss of air pressure varies depend- to the pressure appropriate for the geomembrane type.
ing upon thickness, stiffness, and type of material of the
7.4 Remove the flexible hose that connects the air channel
geomembrane.
tothepressuregauge.Followingpressurestabilization,observe
the air pressure gauge for the desired test time. The test time
5. Significance and Use
should be a minimum of 2 min. Mark the time and pressure of
5.1 The increased use of geomembranes as barrier materials the beginning and end of the test on the geomembrane with a
visible marker. The maximum allowable pressure drop may be
to restrict liquid or gas movement, and the common use of
dual-track seams in joining these sheets, has cr
...
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: D5820 − 95 (Reapproved 2018)
Standard Practice for
Pressurized Air Channel Evaluation of Dual-Seamed
Geomembranes
This standard is issued under the fixed designation D5820; 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. Referenced Documents
2.1 ASTM Standards:
1.1 This practice covers a nondestructive evaluation of the
D4437/D4437M Practice for Nondestructive Testing (NDT)
continuity of parallel geomembrane seams separated by an
for Determining the Integrity of Seams Used in Joining
unwelded air channel. The unwelded air channel between the
Flexible Polymeric Sheet Geomembranes
two distinct seamed regions is sealed and inflated with air to a
D4439 Terminology for Geosynthetics
predetermined pressure. Long lengths of seam can be evaluated
D4491/D4491M Test Methods for Water Permeability of
by this practice more quickly than by other common nonde-
Geotextiles by Permittivity
structive tests.
2.2 EPA Standard:
1.2 This practice should not be used as a substitute for
EPA/530/SW-91/051 Technical Guidance Document: In-
destructive testing. Used in conjunction with destructive
spection Techniques for the Fabrication of Geomembrane
testing, this method can provide additional information regard- Field Seams
ing the seams undergoing testing.
3. Terminology
1.3 This practice supercedes Practice D4437/D4437M for
3.1 Definitions:
geomembrane seams that include an air channel. Practice
3.1.1 dual seam, n—a geomembrane seam with two parallel
D4437/D4437M may continue to be used for other types of
welded zones separated by an unwelded air space.
seams. The user is referred to the referenced standards, or to
3.1.2 Discussion—The dual seam itself can be made by a
EPA/530/SW-91/051 for additional information regarding
number of methods, the most common being the hot wedge
geomembrane seaming techniques and construction quality
technique. Other possible methods include hot air and ultra-
assurance.
sonic bonding techniques.
1.4 This standard does not purport to address all of the
3.1.3 geomembrane, n—an essentially impermeable geosyn-
safety concerns, if any, associated with its use. It is the
thetic composed of one or more synthetic sheets.
responsibility of the user of this standard to establish appro-
3.1.4 Discussion—In geotechnical engineering, “imperme-
priate safety, health, and environmental practices and deter-
able” essentially means that no measurable liquid flows
mine the applicability of regulatory limitations prior to use.
through a geosynthetic when tested in accordance with Test
1.5 This international standard was developed in accor-
Methods D4491/D4491M.
dance with internationally recognized principles on standard-
3.1.5 seam, n—a permanent joining of two or more materi-
ization established in the Decision on Principles for the
als.
Development of International Standards, Guides and Recom-
3.2 For definitions of other terms, see Terminology D4439.
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
4. Summary of Practice
4.1 This practice utilizes a dual seam where an air channel
exists between the two welded zones. Both ends of the air
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
This practice is under the jurisdiction of ASTM Committee D35 on Geosyn- contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
thetics and is the direct responsibility of Subcommittee D35.10 on Geomembranes. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Feb. 1, 2018. Published February 2018. Originally the ASTM website.
approved in 1995. Last previous edition approved in 2011 as D5820 – 95 (2011). Available from the Superintendent of Documents, U. S. Government Printing
DOI: 10.1520/D5820-95R18. Office, Washington, DC 20402.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D5820 − 95 (2018)
channel are sealed and then a pressure gauge is attached to the 7. Procedure
air space. Air pressure is applied and the gauge is monitored for
7.1 After the dual-track seam is fabricated and the length of
excessive gauge air pressure drop.
seam that is to be evaluated is determined, seal off the two ends
4.2 Air pressures used in this practice are related to the of the continuous air channel.
thickness, stiffness, and material type of the geomembrane.
7.2 Connect the pressure gauge directly to the air channel.
4.3 The minimum monitoring time is recommended to be
7.3 Connect an air pump to the pressure gauge with a
2 min following stabilization of the pressure.
flexible hose via a quick connect and pressurize the air channel
to the pressure appropriate for the geomembrane type.
4.4 Maximum allowable loss of air pressure varies depend-
ing upon thickness, stiffness, and type of material of the
7.4 Remove the flexible hose that connects the air channel
geomembrane.
to the pressure gauge. Following pressure stabilization, observe
the air pressure gauge for the desired test time. The test time
5. Significance and Use
should be a minimum of 2 min. Mark the time and pressure of
the beginning and end of the test on the geomembrane with a
5.1 The increased use of geomembranes as barrier materials
to restrict liquid or gas movement, and the common use of visible marker. The maximum allowable pressure drop may be
compared to the maximum allowable value.
dual-track seams in joining these sheets, has created a need for
a standard nondestructive test b
...
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: D5820 − 95 (Reapproved 2011) D5820 − 95 (Reapproved 2018)
Standard Practice for
Pressurized Air Channel Evaluation of Dual Seamed Dual-
Seamed Geomembranes
This standard is issued under the fixed designation D5820; 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 TheThis practice covers a nondestructive evaluation of the continuity of parallel geomembrane seams separated by an
unwelded air channel. The unwelded air channel between the two distinct seamed regions is sealed regions is sealed and inflated
with air to a predetermined pressure. Long lengths of seam can be evaluated by this practice more quickly than by other common
nondestructive tests.
1.2 This practice should not be used as a substitute for destructive testing. Used in conjunction with destructive testing, this
method can provide additional information regarding the seams undergoing testing.
1.3 This practice supercedes Practice D4437D4437/D4437M for geomembrane seams that include an air channel. Practice
D4437D4437/D4437M may continue to be used for other types of seams. The user is referred to the referenced standards, or to
EPA/530/SW-91/051 for additional information regarding geomembrane seaming techniques and construction quality assurance.
1.4 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.5 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.
2. Referenced Documents
2.1 ASTM Standards:
D4437D4437/D4437M Practice for Nondestructive Testing (NDT) for Determining the Integrity of Seams Used in Joining
Flexible Polymeric Sheet Geomembranes
D4439 Terminology for Geosynthetics
D4491D4491/D4491M Test Methods for Water Permeability of Geotextiles by Permittivity
2.2 OtherEPA Standard:
EPA/530/SW-91/051 Technical Guidance Document: Inspection Techniques for the Fabrication of Geomembrane Field Seams
3. Terminology
3.1 Definitions:
3.1.1 dual seam, n—a geomembrane seam with two parallel welded zones separated by an unwelded air space.
3.1.2 Discussion—The dual seam itself can be made by a number of methods, the most common being the hot wedge technique.
Other possible methods include hot air and ultrasonic bonding techniques.
3.1.3 geomembrane, n—an essentially impermeable geosynthetic composed of one or more synthetic sheets.
3.1.4 Discussion—In geotechnical engineering, impermeable“impermeable” essentially means that no measurable liquid flows
through a geosynthetic when tested in accordance with Test Methods D4491D4491/D4491M.
3.1.5 seam, n—a permanent joining of two or more materials.
This practice is under the jurisdiction of ASTM Committee D35 on Geosynthetics and is the direct responsibility of Subcommittee D35.10 on Geomembranes.
Current edition approved June 1, 2011Feb. 1, 2018. Published July 2011February 2018. Originally approved in 1995. Last previous edition approved in 20062011 as
D5820 – 95 (2011). (2006). DOI: 10.1520/D5820-95R11.10.1520/D5820-95R18.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 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.
Available from the Superintendent of Documents, U. S. Government Printing Office, Washington, DC 20402.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D5820 − 95 (2018)
3.2 For definitions of other terms, see Terminology D4439.
4. Summary of Practice
4.1 This practice utilizes a dual seam where an air channel exists between the two welded zones. Both ends of the air channel
are sealed and then a pressure gauge is attached to the air space. Air pressure is applied and the gauge is monitored for excessive
gauge air pressure drop.
4.2 Air pressures used in this practice are related to the thickness, stiffness, and material type of the geomembrane.
4.3 The minimum monitoring time is recommended to be 2 min following stabilization of the pressure.
4.4 Maximum allowable loss of air pressure varies depending upon thickness, stiffness, and type of material of the
geomembrane.
5. Significance and Use
5.1 The increased use of geomembranes as barrier materials to restrict liquid or gas movement, and the common use of dual
track dual-track seams in joining these sheets, has created a need for a standard nondestructive test by which the quality of the
seams can be assessed for continuity and water tightness. watertightness. The test is not intended to provide any indication of the
physical strength of the seam.
5.2 This practice recommends an air pressure test within the channel created between dual seamed dual-seamed tracks whereby
the presence of unbonded sections or channels, voids, nonhomogenities, discontinuities, foreign objects, and the like, in the seamed
region can be identified.
5.3 This technique is intended for use on seams between geomembrane sheets formulated from the appropriate polymers and
compounding ingredients to form a plastic or elastomer sheet material that mee
...
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