ASTM A674-10

Standard Practice for Polyethylene Encasement for Ductile Iron Pipe for Water or Other Liquids

ABSTRACT
This practice covers the standard materials and installation procedures for polyethylene encasement to be applied to underground installations of ductile iron pipe for water or other liquids. It may also be used for polyethylene encasement of fittings, valves, and other appurtenances to ductile iron pipe systems. Linear low-density and high-density cross-laminated polyethylene films shall be manufactured of virgin polyethylene material, and shall conform to the required group, density, dielectric strength, and volume resistivity specifications. The polyethylene encasement material shall also be in accordance to the tensile strength, elongation, dielectric strength, impact resistance, and propagation tear resistance requirements. The polyethylene encasement shall be installed in such a way that it shall prevent contact between the pipe and the surrounding backfill and bedding material without intending to be a completely airtight or watertight enclosure. The polyethylene film shall be fitted to the contour of the pipe with sufficient slack to prevent stretching the polyethylene bridging irregular surfaces. For installations below the water table or in areas subject to tidal actions, or both, it is recommended that tube-form polyethylene be used with both ends sealed as thoroughly as possible with adhesive tape or plastic tie straps at the joint overlap.
SCOPE
1.1 This practice covers materials and installation procedures for polyethylene encasement to be applied to underground installations of ductile iron pipe. It may also be used for polyethylene encasement of fittings, valves, and other appurtenances to ductile iron pipe systems.  
1.2 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.
1.2.1 Important SI values are provided in brackets. Also, certain important SI values appear without brackets or parentheses.
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-2010
• ICS: 23.040.10 - Iron and steel pipes
• Technical Committee: A04 - Iron Castings
• Drafting Committee: A04.12 - Pipes and Tubes

Relations

• Replaces: ASTM A674-05 - Standard Practice for Polyethylene Encasement for Ductile Iron Pipe for Water or Other Liquids
• Effective Date: 01-Oct-2010
• Replaced By: ASTM A674-10(2014) - Standard Practice for Polyethylene Encasement for Ductile Iron Pipe for Water or Other Liquids
• Effective Date: 01-Oct-2014
• Referred By: ASTM G218-19 - Standard Guide for External Corrosion Protection of Ductile Iron Pipe Utilizing Polyethylene Encasement Supplemented by Cathodic Protection
• Effective Date: 01-Oct-2010

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: A674 − 10
StandardPractice for
Polyethylene Encasement for Ductile Iron Pipe for Water or
1
Other Liquids
This standard is issued under the fixed designation A674; 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.
3
1. Scope 2.2 ANSI/AWWA Standards:
C 600 Installation of Ductile Iron Water Mains and Their
1.1 This practice covers materials and installation proce-
Appurtenances
dures for polyethylene encasement to be applied to under-
C 105/A21.5 PolyethyleneEncasementforDuctile-IronPipe
groundinstallationsofductileironpipe.Itmayalsobeusedfor
Systems
polyethylene encasement of fittings, valves, and other appur-
tenances to ductile iron pipe systems.
3. Terminology
1.2 The values stated in inch-pound units are to be regarded
3.1 Definitions:
as standard. The values given in parentheses are mathematical
3.1.1 high-density, cross-laminated polyethylene film—Film
conversions to SI units that are provided for information only
extruded from virgin high-density polyethylene raw material,
and are not considered standard.
which is then molecularly oriented by stretching. The final
1.2.1 Important SI values are provided in brackets. Also,
product is then formed by two single-ply layers of the film that
certain important SI values appear without brackets or paren-
arethenlaminatedtogetherwiththeirorientationsat90°toone
theses.
another using molten, high-density, virgin resin.
1.3 This standard does not purport to address all of the
3.1.2 linear low-density polyethylene film—Film extruded
safety concerns, if any, associated with its use. It is the
from virgin linear low-density polyethylene raw material.
responsibility of the user of this standard to establish appro-
3.1.3 polyethylene encasement—polyethylene material, in
priate safety and health practices and determine the applica-
tube or sheet form, that is used to encase ductile iron pipe.
bility of regulatory limitations prior to use.
3.1.4 securing overlap—any one of various methods of
2. Referenced Documents
holding polyethylene encasement in place at the point of
2
overlapuntilbackfillingoperationsarecompleted.Thismaybe
2.1 ASTM Standards:
accomplished with adhesive tape or plastic tie straps.
D149 Test Method for Dielectric Breakdown Voltage and
DielectricStrengthofSolidElectricalInsulatingMaterials
4. Requirements
at Commercial Power Frequencies
D882 Test Method for Tensile Properties of Thin Plastic
4.1 Materials:
Sheeting
4.1.1 General—All films shall be manufactured of virgin
D1709 Test Methods for Impact Resistance of Plastic Film
polyethylene material as non-virgin polyethylene materials
by the Free-Falling Dart Method
may be susceptible to accelerated environmental degradation.
D1922 Test Method for Propagation Tear Resistance of
4.1.1.1 Requirements—The sections that follow list the
Plastic Film and Thin Sheeting by Pendulum Method
material requirements for linear low-density and high-density,
D4976 Specification for Polyethylene Plastics Molding and
cross-laminated polyethylene film. In each category, the film
Extrusion Materials
shall meet all of the listed requirements.
4.1.2 Linear low-density polyethylene film—Linear low-
density polyethylene film shall be manufactured of virgin
1
This practice is under the jurisdiction of ASTM Committee A04 on Iron
polyethylene material conforming to the requirements of
Castings and is the direct responsibility of Subcommittee A04.12 on Pipes and
Specification D4976 shown in Table 1.
Tubes.
Current edition approved Oct. 1, 2010. Published November 2010. Originally 4.1.2.1 Thickness—Linear low-density polyethylene film
approved in 1972. Last previous edition approved in 2005 as A674 - 05. DOI:
shall have a minimum thickness of 0.008 in. [0.20 mm].
10.1520/A0674-10.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available from American Water Works Association (AWWA), 1401 New York
the ASTM website. Ave., NW, Suite 640, Washington, DC 20005.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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A674 − 10
A
TABLE 1 Linear Low-Density Polyethylene Characteristics TABLE 3 Polyethylene Tube Sizes for Push-On Joint Pipe
Nominal Pipe Diameter, in. Recommended Polyethylene
Raw Material Used to Manufacture Polyethylene Encasement Material
B
Flat Tube Width, in. [cm]
Group, density, and dielectric strength in accordance w
...

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:A674–05 Designation:A674–10
Standard Practice for
Polyethylene Encasement for Ductile Iron Pipe for Water or
1
Other Liquids
This standard is issued under the fixed designation A674; 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 practice covers materials and installation procedures for polyethylene encasement to be applied to underground
installations of ductile iron pipe. It may also be used for polyethylene encasement of fittings, valves, and other appurtenances to
ductile iron pipe systems.
1.2
1.2 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.
1.2.1 Important SI values are provided in brackets. Also, certain important SI values appear without brackets or parentheses.
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:
D149 Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at
Commercial Power Frequencies
D882 Test Method for Tensile Properties of Thin Plastic Sheeting
D1709 Test Methods for Impact Resistance of Plastic Film by the Free-Falling Dart Method
D1922 Test Method for Propagation Tear Resistance of Plastic Film and Thin Sheeting by Pendulum Method
D4976 Specification for Polyethylene Plastics Molding and Extrusion Materials
3
2.2 ANSI/AWWA Standards:
C 600 Installation of Ductile Iron Water Mains and Their Appurtenances
C 105/A21.5 Polyethylene Encasement for Ductile-Iron Pipe Systems
3. Terminology
3.1 Definitions:
3.1.1 polyethylene encasement—polyethylene material, in tube or sheet form, that is used to encase ductile iron pipe.
high-density, cross-laminated polyethylene film—Film extruded from virgin high-density polyethylene raw material, which is then
molecularly oriented by stretching. The final product is then formed by two single-ply layers of the film that are then laminated
together with their orientations at 90° to one another using molten, high-density, virgin resin.
3.1.2 securing overlap—any one of various methods of holding polyethylene encasement in place at the point of overlap until
backfilling operations are completed. This may be accomplished with adhesive tape or plastic tie straps.
3.1.3linear low-density polyethylene film—Film extruded from virgin linear low-density polyethylene raw material.
3.1.3 polyethylene encasement—polyethylene material, in tube or sheet form, that is used to encase ductile iron pipe.
3.1.4 high-density, cross-laminated polyethylene film—Film extruded from virgin high-density polyethylene raw material,
which is then molecularly oriented by stretching. Two single-ply layers of the film are then laminated together with their
orientations at 90° to one another to form the final product. securing overlap—any one of various methods of holding polyethylene
encasement in place at the point of overlap until backfilling operations are completed. This may be accomplished with adhesive
tape or plastic tie straps.
1
This practice is under the jurisdiction of ASTM Committee A04 on Iron Castings and is the direct responsibility of Subcommittee A04.12 on Pipes and Tubes.
Current edition approved Nov.Oct. 1, 2005.2010. Published December 2005.November 2010. Originally approved in 1972. Last previous edition approved in 20002005
as A674 - 005. DOI: 10.1520/A0674-105.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM 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.
3
Available from American Water Works Association (AWWA), 1401 New York Ave., NW, Suite 640, Washington, DC 20005.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

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A674–10
4. Requirements
4.1 Materials:
4.1.1 General—All films shall be man
...