1、Designation:D232120Standard Practice forUnderground Installation of Thermoplastic Pipe for Sewersand Other Gravity-Flow Applications1This standard is issued under the fixed designation D2321;the number immediately following the designation indicates the year oforiginal adoption or,in the case of rev
2、ision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope*1.1 This practice provi
3、des recommendations for the instal-lation of buried thermoplastic pipe used in sewers and othergravity-flow applications.These recommendations are in-tended to ensure a stable underground environment for ther-moplastic pipe under a wide range of service conditions.However,because of the numerous fle
4、xible plastic pipe prod-ucts available and the inherent variability of natural groundconditions,achieving satisfactory performance of any oneproduct may require modification to provisions containedherein to meet specific project requirements.1.2 The scope of this practice necessarily excludes produc
5、tperformance criteria such as minimum pipe stiffness,maxi-mum service deflection,or long term strength.Thus,it isincumbent upon the product manufacturer,specifier,or projectengineer to verify and assure that the pipe specified for anintended application,when installed according to proceduresoutlined
6、 in this practice,will provide a long term,satisfactoryperformance according to criteria established for that applica-tion.A commentary on factors important in achieving asatisfactory installation is included in Appendix X1.NOTE1Specific paragraphs in the appendix are referenced in the bodyof this p
7、ractice for informational purposes.NOTE2The following ASTM standards may be found useful inconnection with this practice:Practice D420,Test Method D1556,MethodD2216,Specification D2235,Test Method D2412,Specification D2564,Practice D2657,Practice D2855,Test Methods D2922,Test MethodD3017,Practice F4
8、02,Specification F477,Specification F545,andSpecification F913.NOTE3Most Plumbing Codes and some Building Codes haveprovisions for the installation of underground“building drains andbuilding sewers.”See them for plumbing piping applications.1.3 UnitsThe values stated in inch-pound units are to bereg
9、arded as standard.The values given in parentheses aremathematical conversions to SI units that are provided forinformation only and are not considered standard.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user o
10、f this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the D
11、ecision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D8 Terminology Relating to Materials for Roads and Pave-mentsD420 Guide for Site C
12、haracterization for Engineering De-sign and Construction PurposesD653 Terminology Relating to Soil,Rock,and ContainedFluidsD698 Test Methods for Laboratory Compaction Character-istics of Soil Using Standard Effort(12,400 ft-lbf/ft3(600kN-m/m3)D1556 Test Method for Density and Unit Weight of Soil inP
13、lace by Sand-Cone MethodD2216 Test Methods for Laboratory Determination of Water(Moisture)Content of Soil and Rock by MassD2235 Specification for Solvent Cement for Acrylonitrile-Butadiene-Styrene(ABS)Plastic Pipe and FittingsD2412 Test Method for Determination of External LoadingCharacteristics of
14、Plastic Pipe by Parallel-Plate LoadingD2487 Practice for Classification of Soils for EngineeringPurposes(Unified Soil Classification System)D2488 Practice for Description and Identification of Soils(Visual-Manual Procedures)D2564 Specification for Solvent Cements for Poly(Vinyl1This practice is unde
15、r the jurisdiction of ASTM Committee F17 on PlasticPiping Systems and is the direct responsibility of Subcommittee F17.62 on Sewer.Current edition approved March 15,2020.Published April 2020.Originallyapproved in 1989.Last previous edition approved in 2018 as D2321 18.DOI:10.1520/D2321-20.2For refer
16、enced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on s
