1、Designation: F 2600 06An American National StandardStandard Specification forElectrofusion Type Polyamide-11 Fittings for OutsideDiameter Controlled Polyamide-11 Pipe and Tubing1This standard is issued under the fixed designation F 2600; the number immediately following the designation indicates the
2、 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 (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers polyamide-11 electrofusi
3、onfittings for use with outside diameter-controlled polyamide-11pipe, covered by Specification D 2513. Requirements formaterials, workmanship, and testing performance are included.Where applicable in this specification “pipe” shall mean “pipe”or “tubing.”1.2 The values stated in inch-pound and centi
4、grade tempera-ture units are to be regarded as standard. The values given inparentheses are for information only.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 safety concerns,if a
5、ny, 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:2D 618 Practice for Conditioning Plastics for Testin
6、gD 638 Test Method for Tensile Properties of PlasticsD 1598 Test Method for Time-to-Failure of Plastic PipeUnder Constant Internal PressureD 1599 Test Method for Resistance to Short-Time Hydrau-lic Pressure of Plastic Pipe, Tubing, and FittingsD 1600 Terminology for Abbreviated Terms Relating toPlas
7、ticsD 2122 Test Method for Determining Dimensions of Ther-moplastic Pipe and FittingsD 2513 Specification for Thermoplastic Gas Pressure Pipe,Tubing, and FittingsD 4066 Classification System for Nylon Injection and Ex-trusion Materials (PA)F 412 Terminology Relating to Plastic Piping SystemsF 905 Pr
8、actice for Qualification of Polyethylene Saddle-Fused Joints3. Terminology3.1 DefinitionsDefinitions are in accordance with Termi-nology F 412, and abbreviations are in accordance with Ter-minology D 1600, unless otherwise specified.3.2 Definitions of Terms Specific to This Standard:3.2.1 electrofus
9、iona 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 fusion processwhere the plastic materials of the products being joined bond
10、together.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 polyamide11 (PA11) meeting the requirements for Group 3, Class 2, andGrade 3, (PA32312) as prescribed in Spec
11、ification D 4066.4.2 Rework MaterialClean rework polyamide-11 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
12、 Heating MechanismThe heat mechanism shall be 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 recommendedj
13、oining procedures. These requirements must be met by eachelectrofusion joint design, on each size and type of pipematerial for which the manufacturer recommends use of his1This specification is under the jurisdiction of ASTM Committee F17 on PlasticPiping Systems and is the direct responsibility of
14、Subcommittee F17.60 on Gas.Current edition approved Sept. 1, 2006. Published September 2006.2For 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 S
15、ummary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.fitting. Any revisions to the electrofusion joint design orprocessing by the manufacturer after the initial testing requiresretesting to ensure these requ
16、irements can still be met. Fittingsintended for use in the distribution of natural gas or liquidpetroleum gas shall also meet the requirements of SpecificationD 2513.5.1.1 It is not required that each configuration of a fitting betested to meet all of these qualifications (that is, 2 in. mainsaddle
17、joint with multiple 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 perfo
18、rmance requirements 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 Req
19、uirements:5.2.1 Minimum Hydraulic Burst PressureThe minimumhydraulic burst pressure of the test specimen shall not be lessthan that required to produce 3900psi (26.9MPa) fiber stress inthe pipe being used in the test when tested in accordance with9.1. The test equipment, procedures, and failures def
20、initionsshall be as specified in Test Method D 1599.5.2.2 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 acco
21、rdance with 9.3. Specimens shall besubjected to a tensile stress that causes the pipe to yield orcauses the pipe to break outside the joint area. Tensile testsmust be made on specimens as joined, not on straps cut fromthe specimen. Yielding must be measured only in the pipe,independent of the fittin
22、g 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 ft-lb or higher impact with no failures noted shallbe considered as a “pass” impact test. The de
23、vice for testingand the methods shall be as defined in Practice F 905.5.5 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 Permissible Varia
24、tions6.1 Dimension and tolerances of electrofusion fittings mustbe such that heat fusion is possible to outside diameter (OD)controlled PA-11 pipes such as those listed in SpecificationsD 2513, such that the joints will satisfy the performancerequirements in Section 5. ( See Test Method D 2122.)6.2
25、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 without value and, therefore, is omitted from thisspecificat
26、ion.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,6.3.2 Temperature joining limits, and6.3.3 Operating pressur
27、e 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 these are: (1) maximum pipe out of round allowed atjoint are
28、a; (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 fittings shall be in accordancewith good commercial practice so as
29、 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 injuriousdefects such as gouges, dents, cuts, etc. The fittings
30、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 user.8. Specimen Preparation8.1 Conditioning:8.1.1 Unless otherw
31、ise 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 those tests where conditioning isrequired.8.1.2 Unless otherwise s
32、pecified, condition the specimens(pipe and fittings) prior to joining at the maximum pipetemperature allowable for fusion as recommended by themanufacturer, for not less than 16 h and make the fusion jointat that temperature for those tests where conditioning isrequired.8.2 Test ConditionsConduct th
33、e 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 any fitting is equal to threetimes the diameter of the pipe, but in no
34、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 all fitting outlets with the appropriate size pipe inaccordance with t
35、he 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 less than maximum allowable operating pressure ofF2600062the pipe system
36、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. Saddlejoint specimens destined for mechanical/destructive type testssuch
37、 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 at random and prepare specimensin accordance with Section 8. F
38、rom 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 MethodD 1599.9.1.3 Failure of the fitting or joint shall constitute specimenfailure.9.1.4 Failure of any one of the four specimens shall consti-tute failure of the t
39、est. 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 Sustained Pressure Test:9.2.1 Select four fittings at random and
40、 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 MethodD 1598. All tests shall be conducted at 80 6 2C. Theassemblies are to be subjected to pi
41、pe fiber stresses of 1450 psi(10.0 MPa) for 170 h. Joint specimens shall not fail withinthese time periods. Any failures within these time periods mustbe of the pipe, independent of the fitting or joint and must beof a“ brittle” type pipe failure, not “ductile.” If ductile pipefailures occur, reduce
42、 the pressure of the test and repeat until170-h results or pipe brittle failures are achieved.9.2.3 Failure of the fitting or joint shall constitute specimenfailure.9.2.4 Failure of any one of the four specimens shall consti-tute failure of the test. Failure of one of the four specimenstested is cau
43、se 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 Test:9.3.1 Select four fittings at random and prepare specimensin accordance with Section 8 with the
44、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 pipelengths of 20 in. (304-mm) minimum. From the four speci-mens, condition two specimens each in accordan
45、ce with 8.1.1and 8.1.2.9.3.2 Test the specimens using the apparatus of Test MethodD 638. 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, shallconstitute specimen failure. Failure of any one of the fourspecimens shall constitute failure
46、 of the test. Failure of one ofthe four specimens tested is cause for retest of four additionalspecimens, joined at the failed specimens joining temperature.Failure of any of these four additional specimens constitutes afailure of the test.9.4 Joint Integrity TestsIllustrations of joint crush tests
47、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. Alternately, the fusionevaluation test (FET) offered in 9.4.3 and 9.4.4 may be used inlieu of the crush test. Similar test evaluations as
48、specified in thecontract or purchase order and as agreed upon by the purchaserand manufacturer are of equal value in performing suchevaluations and may be substituted with such agreement.9.4.1 Joint Crush Test:9.4.1.1 Select four fittings at random and prepare specimensin accordance with Section 8.
49、From the four specimens,condition two specimens each in accordance with 8.1.1 and8.1.2 (Note 3).NOTE 3It is permissible to utilize in joint integrity testing, specimensfrom the quick-burst tests conducted in 9.1 after visually determining thatneither the joint area nor the pipe segment to be crushed was a part of thefailure mode in the quick-burst test.9.4.1.2 Slit socket joints longitudinally as illustrated in Fig.1 as near the centerline of the pipe as practical. Pipe lengthsextending out of the socket may be cut back to a minimum of3 in. (76 mm) for ease of pla
