1、Designation:F276712Standard Specification forElectrofusion Type Polyamide-12 Fittings for OutsideDiameter Controlled Polyamide-12 Pipe and Tubing for GasDistribution1This standard is issued under the fixed designation F2767;the number immediately following the designation indicates the year oforigin
2、al adoption or,in the 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.1.Scope*1.1 This specification covers polyamide-12 electrofusionfittings for use wi
3、th outside diameter-controlled polyamide-12pipe,covered by Specification F2785.Requirements formaterials,workmanship,and testing performance are included.Where applicable in this specification“pipe”shall mean“pipe”or“tubing.”1.2 Polyamide 12 electrofusion fittings are intended for usein polyamide 12
4、 systems only.As per the manufacturersrecommendations,no cross fusion between PA12,PA11 and PEis permitted.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 provided for information onlyand are not
5、 considered standard.1.4 The following safety hazards caveat pertains only to thetest method portion,Section 9,of this specification:Thisstandard does not purport to address all of the safety concerns,if any,associated with its use.It is the responsibility of the userof this standard to establish ap
6、propriate safety and healthpractices and determine the applicability of regulatory limita-tions prior to use.2.Referenced Documents2.1 ASTM Standards:2D638 Test Method for Tensile Properties of PlasticsD1598 Test Method for Time-to-Failure of Plastic PipeUnder Constant Internal PressureD1599 Test Me
7、thod for Resistance to Short-Time HydraulicPressure of Plastic Pipe,Tubing,and FittingsD1600 Terminology forAbbreviated Terms Relating to Plas-ticsD2122 Test Method for Determining Dimensions of Ther-moplastic Pipe and FittingsD4066 Classification System for Nylon Injection and Extru-sion Materials(
8、PA)D6779 Classification System for and Basis of Specificationfor Polyamide Molding and Extrusion Materials(PA)F412 Terminology Relating to Plastic Piping SystemsF905 Practice for Qualification of Polyethylene Saddle-Fused JointsF2785 Specification for Polyamide 12 Gas Pressure Pipe,Tubing,and Fittin
9、gs3.Terminology3.1 Definitions are in accordance with Terminology F412,and abbreviations are in accordance with Terminology D1600,unless otherwise specified.3.2 Definitions of Terms Specific to This Standard:3.2.1 electrofusiona heat fusion joining process where theheat source is an integral part of
10、 the fitting,such that whenelectric current is applied,heat is produced that melts and joinsthe plastics.3.2.2 fusion interfacesurface in the heat fusion processwhere the plastic materials of the products being joined bondtogether.3.2.3 fusion zone lengthtotal length of the melted materialin the fit
11、ting cross-section under evaluation.4.Materials and Manufacture4.1 This specification covers fittings made from polyamide12(PA12)meeting the requirements for Group 4,Class 2,andGrade 3,(PA423 16)as prescribed in Specification D6779 andD4066.4.2 Rework MaterialClean rework polyamide-12 mate-rial of t
12、he same resin,free of any wire or contaminantsgenerated from the fitting manufacturers own production,maybe used by the same manufacturer,as long as the fittingsproduced conform to the requirements of this specification.4.3 Heating MechanismThe heat mechanism shall be ofmaterials not detrimental to
13、the performance of the fitting orthe pipe to which it is intended to be joined.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 Oct.15,2012.Published December 2012.Orig
14、inallyapprove in 2009.Last previous edition appeoved in 2009 as F276709.DOI:10.1520/F2767-12.2For 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 Summa
15、ry 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 States1 5.Performance Requirements5.1 The following requirements are for electrofusion jointsthat have bee
16、n joined using the manufacturers recommendedjoining procedures.These requirements must be met by eachelectrofusion joint design,on each size and type of pipematerial for which the manufacturer recommends use of theirfitting.Any revisions to the electrofusion joint design orprocessing by the manufacturer after the initial testing requiresretesting to ensure these requirements can still be met.Fittingsintended for use in the distribution of natural gas or liquidpetroleum gas shall also meet the re
