ASTM A674-05

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Designation:A674–05
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 C 105/A21.5 Polyethylene Encasement for Ductile-Iron
Pipe Systems
1.1 This practice covers materials and installation proce-
dures for polyethylene encasement to be applied to under-
3. Terminology
groundinstallationsofductileironpipe.Itmayalsobeusedfor
3.1 Definitions:
polyethylene encasement of fittings, valves, and other appur-
3.1.1 polyethylene encasement—polyethylene material, in
tenances to ductile iron pipe systems.
tube or sheet form, that is used to encase ductile iron pipe.
1.2 This standard does not purport to address all of the
3.1.2 securing overlap—any one of various methods of
safety concerns, if any, associated with its use. It is the
holding polyethylene encasement in place at the point of
responsibility of the user of this standard to establish appro-
overlapuntilbackfillingoperationsarecompleted.Thismaybe
priate safety and health practices and determine the applica-
accomplished with adhesive tape or plastic tie straps.
bility of regulatory limitations prior to use.
3.1.3 linear low-density polyethylene film—Film extruded
2. Referenced Documents from virgin linear low-density polyethylene raw material.
2
3.1.4 high-density, cross-laminated polyethylene film—Film
2.1 ASTM Standards:
extruded from virgin high-density polyethylene raw material,
D149 Test Method for Dielectric Breakdown Voltage and
which is then molecularly oriented by stretching. Two single-
Dielectric Strength of Solid Electrical Insulating Materials
ply layers of the film are then laminated together with their
at Commercial Power Frequencies
orientations at 90° to one another to form the final product.
D882 Test Method for Tensile Properties of Thin Plastic
Sheeting
4. Requirements
D1709 Test Methods for Impact Resistance of Plastic Film
4.1 Materials:
by the Free-Falling Dart Method
4.1.1 Linear low-density polyethylene film—Linear low-
D1922 Test Method for Propagation Tear Resistance of
density polyethylene film shall be manufactured of virgin
Plastic Film and Thin Sheeting by Pendulum Method
polyethylene material conforming to the requirements of
D4976 Specification for Polyethylene Plastics Molding and
Specification D4976 shown in Table 1.
Extrusion Materials
3 4.1.1.1 Thickness—Linear low-density polyethylene film
2.2 ANSI/AWWA Standards:
shall have a minimum thickness of 0.008 in. [0.20 mm].
C 600 Installation of Ductile Iron Water Mains and Their
4.1.2 High-density cross-laminated polyethylene film—
Appurtenances
High-density cross-laminated polyethylene film shall be manu-
factured of virgin polyethylene material conforming to the
requirements of Specification D4976 shown in Table 2.
1
This practice is under the jurisdiction of ASTM Committee A04 on Iron
4.1.2.1 Thickness—High-density cross-laminated polyeth-
Castings and is the direct responsibility of Subcommittee A04.12 on Pipes and
Tubes. ylene film shall have a minimum thickness of 0.004 in. [0.10
Current edition approved Nov. 1, 2005. Published December 2005. Originally
mm].
approved in 1972. Last previous edition approved in 2000 as A674 - 00. DOI:
4.2 Tube Size—Thetubesizeforeachpipediametershallbe
10.1520/A0674-05.
2
as listed in Table 3.
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
4.3 Color—Polyethylene film may be supplied with its
Standards volume information, refer to the standard’s Document Summary page on
natural color, colors including white and black, or black
the ASTM website.
3 (weather-resistant) containing not less than 2 percent carbon
Available from American Water Works Association (AWWA), 1401 New York
Ave., NW, Suite 640, Washington, DC 20005. black with an average particle diameter of 50 nm or less. A
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A674–05
TABLE 1 Linear Low-Density Polyethylene Characteristics
4.4 Marking requirements—The polyethylene film supplied
Raw Material Used to Manufacture Polyethylene Encasement Material shall be clearly marked, at a minimum of every 2 ft along its
length, containing the following information:
Group, density, and dielectric strength in accordance with the latest revision of
Specification D4976
(a) Manufacturer’s name or registered trademark
Group 2
...