1、Designation:F281810(Reapproved 2014)1Standard Specification forSpecification for Crosslinked Polyethylene(PEX)MaterialGas Pressure Pipe and Tubing1This standard is issued under the fixed designation F2818;the number immediately following the designation indicates the year oforiginal adoption or,in t
2、he case of revision,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.1NOTESections 2 and 5.9 were editorially corrected in May 2015.1.Scope1.1 This specification covers re
3、quirements and test methodsfor material dimensions and tolerances,hydrostatic burststrength,chemical resistance,and impact resistance of PEXpipe and tubing for use in fuel gas mains and services for directburial applications.1.2 The text of this specification references notes andfootnotes provide ex
4、planatory material.These notes and foot-notes(excluding those in tables and figures)shall not beconsidered as requirements of the specification.1.3 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are pro
5、vided for information onlyand 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 of this standard to establish appro-priate safety and health practices and determine the applica-bility
6、 of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D543 Practices for Evaluating the Resistance of Plastics toChemical ReagentsD618 Practice for Conditioning Plastics for TestingD638 Test Method for Tensile Properties of PlasticsD792 Test Methods for Density and Specif
7、ic Gravity(Rela-tive Density)of Plastics by DisplacementD1505 Test Method for Density of Plastics by the Density-Gradient TechniqueD1598 Test Method for Time-to-Failure of Plastic PipeUnder Constant Internal PressureD1599 Test Method for Resistance to Short-Time HydraulicPressure of Plastic Pipe,Tub
8、ing,and FittingsD1600 Terminology forAbbreviated Terms Relating to Plas-ticsD1898 Practice for Sampling of Plastics(Withdrawn 1998)3D2122 Test Method for Determining Dimensions of Ther-moplastic Pipe and FittingsD2290 Test Method for Apparent Hoop Tensile Strength ofPlastic or Reinforced Plastic Pip
9、eD2513 Specification for Polyethylene(PE)Gas PressurePipe,Tubing,and FittingsD2765 Test Methods for Determination of Gel Content andSwell Ratio of Crosslinked Ethylene PlasticsD2837 Test Method for Obtaining Hydrostatic Design Basisfor Thermoplastic Pipe Materials or Pressure Design Basisfor Thermop
10、lastic Pipe ProductsD3350 Specification for Polyethylene Plastics Pipe and Fit-tings MaterialsD4883 Test Method for Density of Polyethylene by theUltrasound TechniqueF412 Terminology Relating to Plastic Piping SystemsF1473 Test Method for Notch Tensile Test to Measure theResistance to Slow Crack Gro
11、wth of Polyethylene Pipesand ResinsF1563 Specification for Tools to Squeeze-off Polyethylene(PE)Gas Pipe or TubingF1041 Guide for Squeeze-Off of Polyolefin Gas PressurePipe and Tubing2.2 Other Standards:B31.8 Gas Transmission and Distribution Piping Systems4PPI-TR3 Policies and Procedures for Develo
12、ping Hydro-static Design Basis(HDB),Pressure Design Basis(PDB),1This specification is under the jurisdiction of ASTM Committee F17 on PlasticPiping Systems and is the direct responsibility of Subcommittee F17.60 on Gas.Current edition approved Aug.1,2014.Published November 2014.Originallypublished i
13、n 2010.Last previous edition approved in 2010 as F281810.DOI:10.1520/F281810R14E01.2For referenced 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 on
14、the ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohock
15、en,PA 19428-2959.United States1 Strength Design Basis(SDB),and Minimum RequiredStrength(MRS)Ratings for Thermoplastic Piping Mate-rials or Pipe5CFR Part 192 Transportation of Natural and Other Gas byPipeline:Minimum Federal Safety Standards63.Terminology3.1 Definitionsare in accordance with Terminol
16、ogy F412,and abbreviations are in accordance with Terminology D1600,unless otherwise specified.3.2 The gas industry terminology used in this specificationis in accordance with ANSI B31.8 or 49 CFR Part 192,unlessotherwise indicated.3.3 The term pipe used herein refers to both pipe and tubingunless specifically stated otherwise.3.4 Definitions of Terms Specific to This Standard:3.4.1 toe-ina small reduction of the outside diameter atthe cut end of a length of thermoplastic pipe.4.Ordering Informa
