ASTM D2774-94

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.

General Information

• Status: Historical
• Publication Date: 09-Apr-2001
• ICS: 23.040.20 - Plastics pipes
• Technical Committee: F17 - Plastic Piping Systems
• Drafting Committee: F17.61 - Water

Relations

• Replaced By: ASTM D2774-01 - Standard Practice for Underground Installation of Thermoplastic Pressure Piping
• Effective Date: 10-Apr-2001

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NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn.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: D 2774 – 94 An American National Standard
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Practice for
1
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. Consult the DoD Index of Specifications and
Standards for the specific year of issue which has been adopted by the Department of Defense.
INTRODUCTION
In general, thermoplastics pressure piping materials behave as ductile materials under load, meaning
that they can undergo considerable deformation without damage. Piping made from such materials has
the ability to bend under a load without breaking and to deform in other ways, while offering continued
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 should be examined and identified and the trenches prepared and
backfilled in accordance with sound bedding procedures and this practice.
1. Scope safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
1.1 This practice covers procedures and references ASTM
priate safety and health practices and determine the applica-
specifications for undreground installation of thermoplastic
bility of regulatory limitations prior to use. Specific precau-
pressure piping, 63-in. (1372-mm) nominal size and smaller. It
tionary statements are given in Sections 10 and 11.
is beyond the scope of this practice to describe these proce-
dures in detail since it is recognized that significant differences
2. Referenced Documents
exist in their implementation depending on kind and type of
2.1 ASTM Standards:
pipe material, pipe size and wall thickness, soil conditions, and
D 1600 Terminology Relating to Abbreviations, Acronyms,
the specific end use.
2
and Codes for Terms Relating to Plastics
1.1.1 This practice assumes that over the range of antici-
D 2487 Test Method for Classification of Soils for Engi-
pated operating conditions, including maximum external load-
2
neering Purposes
ing and minimum internal pressure, the soil/pipe system will
D 2488 Practices for Description and Identification of Soils
offer sufficient structural stability to resist possible excessive
2
(Visual-Manual Procedure)
diametrical deformation, or even collapse. In cases, particu-
2
F 412 Terminology Relating to Plastic Piping Systems
larly with large diameter thinner-walled pipe, for which the
2.2 AWWA Standard:
validity of this assumption may be in question, the selection of
3
C 651 Standard for Disinfecting Water Mains
pipe and recommended installation conditions should be deter-
mined by a qualified engineer.
3. Terminology
1.1.2 Specific pipe characteristics and end-use requirements
3.1 Definitions:
may dictate addition to, or modification of the procedures
3.1.1 Definitions are in accordance with Terminology F 412,
stated or referenced herein.
unless otherwise specified. Abbreviated terms are in accor-
1.2 The values stated in inch-pound units are to be regarded
dance with Terminology D 1600. Installation terminology used
as the standard.
in this practice is illustrated in Fig. 1.
1.3 This standard does not purport to address all of the
3.1.2 The term pipe refers to both pipe and tubing, unless
specifically stated otherwise.
1
This practice is under the jurisdiction of ASTM Committee F-17 on Plastic
Piping Systems and is the direct responsibility of Subcommittee F17.61on Water
2
Pipe. Annual Book of ASTM Standards, Vol 08.04.
3
Current edition approved Oct. 15, 1994. Published December 1994. Originally Available from American Water Works Association, 6666 W. Quincy Ave.,
published as D 2774 – 69 T. Last previous edition D 2774 – 72 (1983). Denver, CO 80235.
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D 2774
means of properly engineered external restraints or joint
restraint devices (see 7.3).
6. Trenching
6.1 Trench Stability
...