ASTM D2774-04
(Practice)Standard Practice for Underground Installation of Thermoplastic Pressure Piping
Standard Practice for Underground Installation of Thermoplastic Pressure Piping
SCOPE
1.1 This practice covers procedures and references ASTM specifications for undreground installation of thermoplastic pressure piping, 63-in. (1372-mm) nominal size and smaller. It is beyond the scope of this practice to describe these procedures in detail since it is recognized that significant differences exist in their implementation depending on kind and type of pipe material, pipe size and wall thickness, soil conditions, and the specific end use.
1.1.1 This practice assumes that over the range of anticipated operating conditions, including maximum external loading and minimum internal pressure, the soil/pipe system will offer sufficient structural stability to resist possible excessive diametrical deformation, or even collapse. In cases, particularly with large diameter thinner-walled pipe, for which the validity of this assumption may be in question, the selection of pipe and recommended installation conditions should be determined by a qualified engineer.
1.1.2 Specific pipe characteristics and end-use requirements may dictate addition to, or modification of the procedures stated or referenced herein.
1.2 The values stated in inch-pound units are to be regarded as the standard.
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. Specific precautionary statements are given in Sections 10 and 11.
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An American National Standard
Designation:D2774–04
Standard Practice for
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Underground Installation of Thermoplastic Pressure Piping
This standard is issued under the fixed designation D 2774; 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 (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
INTRODUCTION
Ingeneral,thermoplasticspressurepipingmaterialsbehaveasductilematerialsunderload,meaning
thattheycanundergoconsiderabledeformationwithoutdamage.Pipingmadefromsuchmaterialshas
theabilitytobendunderaloadwithoutbreakingandtodeforminotherways,whileofferingcontinued
resistance. This flexibility allows ductile thermoplastic pipe to activate through pipe deformation
lateral soil forces which create a pipe/soil system capable of safely supporting–even in pipes subject
to little or no internal pressure–the earth and superimposed loads which are encountered in most pipe
installations. However, proper installation techniques are required to ensure that the necessary support
at the bottom and passive soil pressures at the sides of the pipe are developed and maintained.
Soils in which trenches are dug shall be examined and identified and the trenches prepared and
backfilled in accordance with sound bedding procedures and this practice.
1. Scope 1.2 The values stated in inch-pound units are to be regarded
as the standard.
1.1 This practice governs procedures and referencesASTM
1.3 This standard does not purport to address all of the
specifications for underground installation of thermoplastic
safety concerns, if any, associated with its use. It is the
pressure piping, 63-in. (1372-mm) nominal size and smaller. It
responsibility of the user of this standard to establish appro-
is beyond the scope of this practice to describe these proce-
priate safety and health practices and determine the applica-
dures in detail since it is recognized that significant differences
bility of regulatory limitations prior to use. Specific precau-
exist in their implementation depending on kind and type of
tionary statements are given in Sections 10 and 11.
pipe material, pipe size and wall thickness, soil conditions, and
the specific end use.
2. Referenced Documents
1.1.1 This practice assumes that over the range of antici-
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2.1 ASTM Standards:
pated operating conditions, including maximum external load-
D 1600 Terminology Relating to Abbreviations, Acronyms,
ing and minimum internal pressure, the soil/pipe system will
and Codes for Terms Relating to Plastics
offer sufficient structural stability to resist possible excessive
D 2487 Test Method for Classification of Soils for Engi-
diametrical deformation, or even collapse. In cases, particu-
neering Purposes
larly with large diameter thinner-walled pipe, for which the
D 2488 Practices for Description and Identification of Soils
validity of this assumption may be in question, the selection of
(Visual-Manual Procedure)
pipe and recommended installation conditions shall be deter-
F 412 Terminology Relating to Plastic Piping Systems
mined by a qualified engineer.
2.2 AWWA Standard:
1.1.2 Specific pipe characteristics and end-use requirements
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C 651 Standard for Disinfecting Water Mains
shall dictate addition to, or modification of the procedures
stated or referenced herein.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
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This practice is under the jurisdiction of ASTM Committee F17 on Plastic contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Piping Systems and is the direct responsibility of Subcommittee F17.61 on Water Standards volume information, refer to the standard’s Document Summary page on
Pipe. the ASTM website.
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Current edition approved Jan. 1, 2004. Published March 2004. Originally Available from American Water Works Association, 6666 W. Quincy Ave.,
approved in 1969. Last previous edition approved in 2001 as D 2774 – 01. Denver, CO 80235.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D2774–04
3. Terminology 5.2 Skill and knowledge on the part of the installer are
required using recommended techniques to obtain quality
3.1 Definitions:
joints. Training of new installers shall be made under the
3.1.1 DefinitionsareinaccordancewithTerminologyF 412,
guidance of skilled individuals. Detailed written procedures
unless otherwise specified. Abbreviated terms are in accor-
and visual aids used to train personnel are available from
dance withTerminology D 1600. Installation terminology
...
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