1、Designation: F1055 11An American National StandardStandard Specification forElectrofusion Type Polyethylene Fittings for OutsideDiameter Controlled Polyethylene and CrosslinkedPolyethylene (PEX) Pipe and Tubing1This standard is issued under the fixed designation F1055; the number immediately followi
2、ng the designation indicates the year oforiginal 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
3、 covers electrofusion polyethylene fit-tings for use with outside diameter-controlled polyethylenepipe, covered by Specifications D2447, D2513, D2737, D3035,and F714 and crosslinked polyethylene (PEX), covered bySpecification F2788. Requirements for materials, workman-ship, and testing performance a
4、re included. All requirementsfor joining PE electrofusion fittings to PE pipe shall also applyto joining PE electrofusion fittings to PEX pipe. Whereapplicable in this specification “pipe” shall mean “pipe” or“tubing.”1.2 The values stated in inch-pound units are to be regardedas standard. The value
5、s given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 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
6、safety concerns,if any, associated with its use. It is the responsibility of the userof this standard to establish appropriate 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 Pr
7、operties of PlasticsD1248 Specification for Polyethylene Plastics ExtrusionMaterials for Wire and CableD1598 Test Method for Time-to-Failure of Plastic PipeUnder Constant Internal PressureD1599 Test Method for Resistance to Short-Time HydraulicPressure of Plastic Pipe, Tubing, and FittingsD1600 Term
8、inology for Abbreviated Terms Relating toPlasticsD2447 Specification for Polyethylene (PE) Plastic Pipe,Schedules 40 and 80, Based on Outside Diameter3D2513 Specification for Polyethylene (PE) Gas PressurePipe, Tubing, and FittingsD2737 Specification for Polyethylene (PE) Plastic TubingD3035 Specifi
9、cation for Polyethylene (PE) Plastic Pipe(DR-PR) Based on Controlled Outside DiameterD3350 Specification for Polyethylene Plastics Pipe andFittings MaterialsF412 Terminology Relating to Plastic Piping SystemsF714 Specification for Polyethylene (PE) Plastic Pipe(SDR-PR) Based on Outside DiameterF905
10、Practice for Qualification of Polyethylene Saddle-Fused JointsF2788 Specification for Metric-sized Crosslinked Polyeth-ylene (PEX) Pipe3. Terminology3.1 DefinitionsDefinitions are in accordance with Termi-nology F412, and abbreviations are in accordance with Termi-nology D1600, unless otherwise spec
11、ified.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 the fitting, such that whenelectric current is applied, heat is produced that melts and joinsthe plastics.3.2.2 fusion interfacesurface in the heat fu
12、sion processwhere the plastic materials of the products being joined bondtogether.3.2.3 fusion zone lengthtotal length of the melted materialin the fitting cross-section under evaluation.4. Materials and Manufacture4.1 This specification covers fittings made from polyethyl-ene compounds as defined i
13、n Specifications D1248 or D3350.1This specification is under the jurisdiction of ASTM Committee F17 on PlasticPiping Systems and is the direct responsibility of Subcommittee F17.10 on Fittings.Current edition approved May 1, 2011. Published May 2011. Originallyapproved in 1987. Last previous edition
14、 approved in 1998 as F1055 98(2006).DOI: 10.1520/F1055-11.2For 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 onthe ASTM website.3Wi
15、thdrawn. The last approved version of this historical standard is referencedon www.astm.org.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4.2 Rework MaterialClean re
16、work polyethylene materialof the same resin, free of any wire or contaminants generatedfrom the fitting manufacturers own production, may be usedby the same manufacturer, as long as the fittings producedconform to the requirements of this specification.4.3 Heating MechanismThe heat mechanism shall b
17、e ofmaterials not detrimental to the performance of the fitting orthe pipe to which it is intended to be joined.5. Performance Requirements5.1 The following requirements are for electrofusion jointsthat have been joined using the manufacturers recommendedjoining procedures. These requirements must b
18、e met by eachelectrofusion joint design, on each size and type of pipematerial for which the manufacturer recommends use of hisfitting. Any revisions to the electrofusion joint design orprocessing by the manufacturer after the initial testing requiresretesting to ensure these requirements can still
19、be met. Fittingsintended for use in the distribution of natural gas or liquidpetroleum gas shall also meet the requirements of SpecificationD2513.5.1.1 It is not required that each configuration of a fitting betested to meet all of these qualifications (that is, 2 in. mainsaddle joint with multiple
20、outlet configurations offered) as longas the electrofusion joint design is not altered in the configu-ration differences.NOTE 1It is permissible when accomplishing these tests, to do so onthe highest and lowest dimension ratio of the same pipe material. If inthose tests all performance requirements
21、are met, all dimension ratiosbetween those tested may be considered as having met the requirements.These tests do not have to cover the full range of dimension ratiosavailable, only the dimension ratio range on which the manufacturerrecommends his fitting be used.5.2 Pressure Requirements:5.2.1 Mini
22、mum Hydraulic Burst Pressure The minimumhydraulic burst pressure of the test specimen shall not be lessthan that required to produce 2520 psi (17.4 MPa) fiber stressin the pipe being used in the test when tested in accordancewith 9.1. The test equipment, procedures, and failures defini-tions shall b
23、e as specified in Test Method D1599.5.2.2 Sustained PressureThe fitting and fused joint shallnot fail when tested in accordance with 9.2.5.3 Tensile Strength Requirements (Coupling Type JointsOnly)The fitting or the pipe to fitting joint made on pipe shallnot fail when tested in accordance with 9.3.
24、 Specimens shall besubjected to a tensile stress that causes the pipe to yield to anelongation no less than 25 % or causes the pipe to breakoutside the joint area. Tensile tests must be made on specimensas joined, not on straps cut from the specimen. Yielding mustbe measured only in the pipe, indepe
25、ndent of the fitting or joint.5.4 Impact Resistance (Saddle Type Joints Only)The jointmade on the specimen shall not fail when impacted with a forcesufficient to break the body or other portion of the specimen.Tests of 500 ftlbf or higher impact with no failures noted shallbe considered as a “pass”
26、impact test. The device for testingand the methods shall be as defined in Practice F905.5.5 Joint Integrity Tests(Couplings and Saddle TypeJoints)The joint made on the specimen shall meet therequirements in 9.4 and 9.5 of this specification, when tested inaccordance with 9.4.6. Dimensions, Mass, and
27、 Permissible Variations6.1 Dimension and tolerances of electrofusion fittings mustbe such that heat fusion is possible to outside diameter (OD)controlled PE pipes such as those listed in SpecificationsD2447, D2513, D2737, D3035, and F714 and PEX pipes listedin Specification F2788, such that the join
28、ts will satisfy theperformance requirements in Section 5.6.2 Because of the varying designs for electrofusion fittings,the actual spread of dimensions may be quite different frommanufacturer to manufacturer. A table of dimensions andtolerances encompassing these differences would be meaning-less and
29、 without value and, therefore, is omitted from thisspecification.6.3 The manufacturer shall furnish to the user the electricalresistance, critical dimensions, and tolerances of his fittings.This information must include at least the following dimen-sions and tolerances:6.3.1 Coupling inside diameter
30、,6.3.2 Temperature joining limits, and6.3.3 Operating pressure of the fitting.NOTE 2There are other items that fall beyond the scope of thisspecification which would be of interest to the user for proper applicationof the fittings and is recommended as additional information to befurnished. A few of
31、 these are: (1) maximum pipe out of round allowed atjoint area; (2) minimum/maximum pipe SDR capability of the fitting, and(3) for saddles intended for use on a live main, the maximum allowableline pressure when making the joint.7. Workmanship, Finish, and Appearance7.1 The manufacture of these fitt
32、ings shall be in accordancewith good commercial practice so as to produce fittingsmeeting the requirements of this specification.7.2 The fittings shall be homogeneous throughout, exceptwhere a heating coil or electrical connectors are incorporated,and free of cracks, holes, foreign inclusions, or in
33、juriousdefects such as gouges, dents, cuts, etc. The fittings shall be asuniform as commercially practicable in opacity, density, andother physical properties.Any heating coils, connecting cables,connectors, and related electrical power source shall be de-signed to prevent electrical shock to the us
34、er.8. Specimen Preparation8.1 Conditioning:8.1.1 Unless otherwise specified, condition the specimens(pipe and fittings) prior to joining at the minimum pipetemperature allowable for fusion as recommended by themanufacturer, for not less than 16 h and make the fusion jointat that temperature for thos
35、e tests where conditioning isrequired.8.1.2 Unless otherwise specified, condition the specimens(pipe and fittings) prior to joining at the maximum pipetemperature allowable for fusion as recommended by theF1055 112manufacturer, for not less than 16 h and make the fusion jointat that temperature for
36、those tests where conditioning isrequired.8.2 Test ConditionsConduct the tests at the StandardLaboratory Temperature of 23 6 2C (73.4 6 3.6F) unlessotherwise specified.8.3 Preparation of Specimens for Testing:8.3.1 Prepare test specimens so that the minimum length ofunreinforced pipe on one side of
37、any fitting is equal to threetimes the diameter of the pipe, but in no case less than 12 in.(304 mm). It is permissible to test multiple fittings togetherprovided they are separated by a minimum distance equal tothree times the diameter of the pipe, but in no case less than 12in. (304 mm).8.3.2 Fuse
38、 all fitting outlets with the appropriate size pipe inaccordance with the manufacturers recommended procedures.8.3.3 All saddle fusion joint specimens conditioned as in8.1.2 and destined for quick burst testing as in 9.1 andsustained pressure testing as in 9.2, are to be joined with thepipe at no le
39、ss than maximum allowable operating pressure ofthe pipe system or fitting, whichever is lowest, when beingprepared for those tests. The pipe should be left under pressurefor a time period not less than recommended by the manufac-turer for cooling in the field prior to disturbing the joint. Saddlejoi
40、nt specimens destined for mechanical/destructive type testssuch as impact as in 5.4 or crush tests as in 9.4, or specimensconditioned for cold temperature joining as in 8.1.1, may bemade on unpressured pipe specimens.9. Test Methods9.1 Minimum Hydraulic Burst Pressure Test:9.1.1 Select four fittings
41、 at random and prepare specimensin accordance with Section 8. From the four specimens,condition two specimens each in accordance with 8.1.1 and8.1.2.9.1.2 Test the specimens in accordance with Test MethodD1599.9.1.3 Failure of the fitting or joint shall constitute specimenfailure.9.1.4 Failure of an
42、y one of the four specimens shall consti-tute failure of the test. Failure of one of the four specimenstested is cause for retest of four additional specimens, joined atthe failed specimens joining temperature. Failure of any ofthese four additional specimens constitutes a failure of the test.9.2 Su
43、stained Pressure Test:9.2.1 Select four fittings at random and prepare specimensin accordance with Section 8 of this specification. From thefour specimens, condition two specimens each in accordancewith 8.1.1 and 8.1.2.9.2.2 Test the specimens in accordance with Test MethodD1598. All tests shall be
44、conducted at 80 6 2C. Theassemblies are to be subjected to pipe fiber stresses of 580 psi(4.0 mPa) for 1000 h or 670 psi (4.6 mPa) for 170 h. Jointspecimens shall not fail within these time periods. Any failureswithin these time periods must be of the pipe, independent ofthe fitting or joint and mus
45、t be of a“ brittle” type pipe failure,not “ductile.” If ductile pipe failures occur, reduce the pressureof the test and repeat until 170- or 1000-h results or pipe brittlefailures are achieved.9.2.3 Failure of the fitting or joint shall constitute specimenfailure.9.2.4 Failure of any one of the four
46、 specimens shall consti-tute failure of the test. Failure of one of the four specimenstested is cause for retest of four additional specimens, joined atthe failed-specimens-joining temperature. Failure of any ofthese four additional specimens constitutes a failure of the test.9.3 Tensile Strength Te
47、st:9.3.1 Select four fittings at random and prepare specimensin accordance with Section 8 with the exception that it ispermissible, on pipe sizes above 4 in. (102 mm) IPS, if limitsof tensile machine will not allow 25 % elongation with pipespecimens of three-pipe diameters, to test with free pipelen
48、gths of 20 in. (304-mm) minimum. From the four speci-mens, condition two specimens each in accordance with 8.1.1and 8.1.2.9.3.2 Test the specimens using the apparatus of Test MethodD638. Test at a pull rate of 0.20 in. (5.0 mm) per min, 625 %.9.3.3 Failure of the fitting or joint as defined in 5.3,
49、shallconstitute specimen failure.9.3.4 Failure of any one of the four specimens shall consti-tute failure of the test. Failure of one of the four specimenstested is cause for retest of four additional specimens, joined atthe failed specimens joining temperature. Failure of any ofthese four additional specimens constitutes a failure of the test.9.4 Joint Integrity TestsIllustrations of joint crush tests forsocket type joints and saddles are offered in 9.4.1 and 9.4.2 astest methods that are useful as an evaluation of bondingstrength between the pipe and fitting
