1、Designation: D3261 16Standard Specification forButt Heat Fusion Polyethylene (PE) Plastic Fittings forPolyethylene (PE) Plastic Pipe and Tubing1This standard is issued under the fixed designation D3261; the number immediately following the designation indicates the year oforiginal adoption or, in th
2、e 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.This standard has been approved for use by agencies of the U.S. Department of Defense.1. Scope*1.1
3、 This specification covers polyethylene (PE) butt fusionfittings for use with polyethylene pipe (IPS, DIPS, and ISO)and tubing (CTS). Included are requirements for materials,workmanship, dimensions, marking, sustained pressure, andburst pressure.1.2 The values stated in inch-pound units are to be re
4、gardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.2. Referenced Documents2.1 ASTM Standards:2D1598 Test Method for Time-to-Failure of Plastic PipeUnder Constant Internal PressureD1599 Test
5、Method 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 FittingsD2513 Specification for Polyethylene (PE) Gas PressurePipe, Tubing, a
6、nd FittingsD3350 Specification for Polyethylene Plastics Pipe and Fit-tings MaterialsF412 Terminology Relating to Plastic Piping SystemsF2206 Specification for Fabricated Fittings of Butt-FusedPolyethylene (PE)2.2 Federal Standard:Fed. Std. No. 123 Marking for Shipment (Civil Agencies)32.3 Military
7、Standard:MIL-STD-129 Marking for Shipment and Storage32.4 National Sanitation Foundation Standard:Standard No. 14 for Plastic Piping Components and RelatedMaterials42.5 Plastic Pipe Institute5PPI TR-3 Policies and Procedures for Developing Hydro-static Design Basis (HDB), Pressure Design Basis (PDB)
8、,Strength Design Basis (SDB), and Minimum RequiredStrength (MRS) Ratings for Thermoplastic Piping Mate-rials or Pipe7PPI TR-4 HDB/SDB/PDB/MRS Listed Materials, PPI List-ing of Hydrostatic Design Basis (HDB), Strength DesignBasis (SDB), Pressure Design Basis (PDB), and MinimumRequired Strength (MRS)
9、Ratings for Thermoplastic Pip-ing Materials or Pipe3. Terminology3.1 Definitions are in accordance with Terminology F412and abbreviations are in accordance with Terminology D1600,unless otherwise specified.3.2 Definitions:3.2.1 butt fusion fitting, na fitting have one or more outletsthat can be butt
10、 fusion joined to pipe, tubing, or fitting.3.2.2 dimension ratio (DR) for thermoplastic pipethe ratioof diameter to wall thickness. For this specification it iscalculated by dividing the specified outside diameter by thespecified wall thickness of the fitting at its area of fusion. DRsare rounded an
11、d do not calculate exactly.4. Classification4.1 GeneralThis specification covers butt fusion fittingsintended for use with polyethylene pipe and tubing.4.1.1 Fittings covered by this specification are molded ormachined from extruded or molded stock. Fittings covered bythis specification may be produ
12、ced by joining together one or1This 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 Nov. 1, 2016. Published November 2016. Originallyapproved in 1973. Last previous edi
13、tion approved in 2015 as D3261 15. DOI:10.1520/D3261-16.2For 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.3DLA
14、Document Services Building 4/D 700 Robbins Avenue Philadelphia, PA19111-5094 http:/quicksearch.dla.mil/4Available from NSF International, P.O. Box 130140, 789 N. Dixboro Rd., AnnArbor, MI 48113-0140, http:/www.nsf.org.5Available from Plastics Pipe Institute (PPI), 105 Decker Court, Suite 825,Irving,
15、 TX 75062, http:/www.plasticpipe.org.*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 States1more fittings meeting this specification using butt or saddleheat fusion joining met
16、hods. Fittings that are butt fusion joinedto a length of pipe or tubing (a pup) meeting the end-usesystem specification are acceptable.4.1.2 Fittings fabricated by other types of thermal weldingmethods, such as extrusion welding, hot-air welding, andultrasonic welding are not included in this specif
17、ication.4.1.3 Fittings fabricated with mitered heat fusion joints arecovered by Specification F2206, and are not included in thisspecification4.1.4 Fittings intended for use in the distribution of naturalgas or petroleum fuels shall also meet the requirements ofSpecification D2513.5. Ordering Inform
18、ation5.1 When ordering fittings under this specification, thefollowing should be specified:5.1.1 Polyethylene compound (material designation or tradename)5.1.2 Style of fitting (tee, 90 ell, and the like)5.1.3 Size:5.1.3.1 Nominal diameter.5.1.3.2 CTS, IPS, DIPS, or schedule.5.1.3.3 Dimension ratio
19、number or schedule number.6. Materials6.1 Polyethylene CompoundPolyethylene material com-pounds suitable for use in the manufacture of fittings under thisspecification shall meet Specification D3350 and shall meet theSpecification D3350 classification and property requirementsinTable 1 and shall hav
20、e PPI TR-4 HDB and HDS listings at73F (23C) and HDB listings 140F (60C) in accordancewith Table 1.6.2 Color and Ultraviolet (UV) StabilizationPolyethylenematerial compounds shall meet Specification Table 1 code C orE. Code C material compounds shall have 2 to 3 percent carbonblack. Code E material c
21、ompounds shall be colored with UVstabilizer.6.3 Rework MaterialClean polyethylene compound fromthe manufacturers own production that met 6.1 and 6.2 asvirgin material is suitable for remolding into fittings, eitheralone or blended with new compound of the same cellclassification or material designat
22、ion. Fittings containing therework material shall meet the material and product require-ments of this specification.7. Requirements7.1 Dimensions and Tolerances:7.1.1 Outside DiameterNominal outside diameters of buttfusion fittings shall conform to the nominal iron pipe size(IPS), ductile iron pipe
23、size (DIPS)or copper tubing size (CTS)dimensions at area of fusion. These dimensions and tolerancesshall be as shown in Table 2, Table 3, Table 4 and of thisspecification.7.1.2 Inside Diameter (CTS Fittings Only)Inside diam-eters of butt fusion fittings for tubing at area of fusion shallconform to t
24、he dimensions of the tubing being joined. Thedimensions and tolerances for the fittings are shown in Table 5.7.1.3 Wall ThicknessThe wall thicknesses of butt fusionfittings shall not be less than the minimum specified for thepipe or tubing. The wall thicknesses and tolerances at the areaof fusion sh
25、all be as shown in Table 5, Table 6, Table 7, andTable 8 of this specification.7.1.4 MeasurementsThese shall be made in accordancewith Test Method D2122 for roundable pipe.7.1.5 Design DimensionsOverall fitting dimensions maybe as preferred from a design standpoint by the manufacturerand accepted by
26、 the purchaser consistent with 7.1.3.7.1.6 Special SizesWhere existing system conditions orspecial local requirements make other diameters or dimensionratios necessary, other sizes or dimension ratios, or both, shallbe acceptable for engineered applications when mutuallyagreed upon by the customer a
27、nd the manufacturer, if the fittingis manufactured from plastic compounds meeting the materialrequirements of this specification, and the strength and designrequirements are calculated on the same basis as those used inthis specification. For diameters not shown in Table 2, Table 3or Table 4, the to
28、lerance shall be the same percentage as thatshown in the corresponding tables for the next smaller listedsize. Minimum wall thickness for these special sizes shall notbe less than the minimum wall specified for the pipe or tubingthe fitting is designed to be used with. The maximum wallTABLE 1 Specif
29、ication D3350 Classification of Polyethylene Fittings MaterialsPhysical Properties Cell Classification and Properties for Polyethylene Pipe MaterialsPE2606 PE2706 PE2708 PE3608 PE3708 PE3710 PE4708 PE4710Density 2 2233344Melt Index 3 or 4 3 or 4 3 or 4 44444Flexural modulus $4 $4 $4 $4 $4 $4 $4 $5Te
30、nsile Strength $3 $3 $3 $4 $4 $4 $4 $4Slow crack growth resistance(F1473)6 7767777Hydrostatic strength classifica-tion3 3344444Color and UV StabilizerACorE CorE CorE CorE CorE CorE CorE CorEHDB at 140F (60C), PPI TR-4,psi (MPa)B BBBBBBBHDB at 73F (23C), PPI TR-4,psi (MPa)630 (4.34) 630 (4.34) 800 (5
31、.52) 800 (5.52) 800 (5.52) 1000(6.90)800 (5.52) 1000(6.90)ASee 6.2.BListing required; consult manufacturer for listed value.D3261 162thickness allowed shall not be greater than 20 % thicker thanthe specified minimum wall, and shall be determined by 10.4.3of this specification.7.2 Pressure Test Requi
32、rements :7.2.1 Short-Term Rupture Strength for Fittings12 to 12 in.and 90 to 315 mm, Nominal DiameterThe minimum short-term rupture strength of the fitting and fused pipe or tubingshall not be less than the minimum short-term rupture strengthof the pipe or tubing in the system when tested in accorda
33、ncewith 10.5.3. These minimum pressures shall be as shown inTable 9 of this specification. Test specimens shall be preparedfor testing in the manner described in 10.5.1 of this specifica-tion. The test equipment, procedures, and failures definitionsshall be as specified in Test Method D1599.7.2.2 Sh
34、ort-Term Strength for Fittings 14 to 48 in. and 355to 1600 mm, Nominal DiameterFittings shall not fail whentested in accordance with 10.5.4. The minimum pressure shallbe as shown in Table 9 of this specification. Test specimensshall be prepared for testing in the manner described in 10.2 ofthis spec
35、ification. The test equipment and procedures shall beas specified in Test Method D1599.7.2.3 Sustained PressureThe fitting and fused pipe ortubing shall not fail, as defined in Test Method D1598, whentested at the time, pressures, and test temperatures selectedfrom test options offered in Table 10.
36、The test specimens shallbe prepared for testing in the manner prescribed in 10.5.1.8. Workmanship, Finish, and Appearance8.1 The manufacture of these fittings shall be in accordancewith good commercial practice so as to produce fittingsmeeting the requirements of this specification. Fittings shall b
37、ehomogeneous throughout and free of cracks, holes, foreigninclusions, or other injurious defects. The fittings shall be asuniform as commercially practicable in color, opacity, density,and other physical properties.9. Sampling9.1 Parts made for sale under this specification should besampled at a fre
38、quency appropriate for the end use intended.When the fittings are to be installed under a system specifica-tion (such as Specification D2513 for gas), the minimumrequirements of that specification must be satisfied.10. Test Methods10.1 GeneralThe test methods in this specification coverfittings to b
39、e used with pipe and tubing for gas, water, and otherengineered piping systems. Test methods that are applicablefrom other specifications will be referenced in the paragraphpertaining to the particular test. Certain special test methodsTABLE 2 IPS Sizing System Outside Diameters and Tolerancesfor Fi
40、ttings for Use with Polyethylene Pipe, in.Nominal PipeSizeAverage OutsideDiameter at Area ofFusionATolerance12340.8401.0500.0080.0081 1.315 0.010114 1.660 0.010112 1.900 0.0102 2.375 0.0103 3.500 0.0124 4.500 0.0156 6.625 0.0188 8.625 0.02510 10.750 0.02712 12.750 0.03614 14.000 0.06316 16.000 0.072
41、18 18.000 0.08120 20.000 0.09021.5 21.500 0.09722 22.000 0.09924 24.000 0.10828 28.000 0.12632 32.000 0.14436 36.000 0.16242 42.000 0.18948 48.000 0.216ADefined as measured14 to12 in. (6.4 to 12.7 mm) from fitting outlet extremity.TABLE 3 DIPS Sizing System Outside Diameters and Tolerancesfor Fittin
42、gs for Use with Polyethylene Pipe, in.Nominal Pipe SizeAverage Outside Diameterat Area of FusionToleranceA3 3.96 0.0164 4.80 0.0226 6.90 0.0318 9.05 0.04110 11.10 0.05012 13.20 0.05914 15.30 0.06916 17.40 0.07818 19.50 0.08820 21.60 0.09724 25.80 0.11630 32.000 0.14436 38.30 0.17242 44.50 0.20048 50
43、.80 0.229ADefined as measured14 to12 in. (6.4 to 12.7) from fitting outlet extremity.TABLE 4 ISO Sizing System (ISO 161/1) Outside Diameters andTolerances for Fit for Use with Polyethylene Pipe, mmNominal PipeSizeAverage Outside Diameter at Area of FusionMin MaxA90 90.0 90.8110 110.0 111.0160 160.0
44、161.4200 200.0 201.8250 250.0 252.3280 280.0 282.5315 315.0 317.8355 355.0 358.2400 400.0 403.6450 450.0 454.1500 500.0 504.5560 560.0 565.0630 630.0 635.7710 710.0 716.4800 800.0 807.2900 900.0 908.11000 1000.0 1009.01200 1200.0 1210.81400 1400.0 1412.61600 1600.0 1614.4ASpecified in ISO 3607.D3261
45、 163applicable to this specification only are explained in theappropriate paragraph.10.2 ConditioningUnless otherwise specified, conditionthe specimens prior to test at 73.4 6 3.6F (23 6 2C) for notless than6hinair,or1hinwater, for those tests whereconditioning is required and in all cases of disagr
46、eement.Newly molded fittings shall be conditioned 40 h prior to test.10.3 Test ConditionsConduct the tests at the standardlaboratory temperature of 73.4 6 3.6F (23 6 2C) unlessotherwise specified.TABLE 5 Diameter, Wall Thickness, and Tolerances for Fittings for Use with Plastic TubingTubing Typein.
47、(mm)Nominal TubingSize, in.Diameter at Area of FusionAMinimum WallThickness, in. (mm)Outside, in. (mm) Inside, in. (mm)Average Tolerance Average Tolerance0.062 (1.57)12 CTS 0.625 (15.88) 0.010 (0.26) 0.495 (12.58) 0.004 (0.10) 0.062 (1.58)34 CTS 0.875 (22.22) 0.010 (0.26) 0.745 (18.92) . .0.090 (2.2
48、9)12 CTS 0.625 (15.88) 0.010 (0.26) 0.437 (11.10) 0.004 (0.10) 0.090 (2.28)34 CTS 0.875 (22.22) 0.010 (0.26) 0.687 (17.44) 0.004 (0.10) 0.090 (2.28)1 CTS 1.125 (28.58) 0.013 (0.34) 0.937 (23.80) 0.005 (0.12) 0.090 (2.28)114 CTS 1.375 (34.92) 0.013 (0.34) 1.187 (30.14) 0.005 (0.12) 0.090 (2.28)DR 113
49、4 CTS 0.875 (22.22) 0.010 (0.26) 0.715 (18.16) 0.004 (0.10) 0.077 (1.96)1 CTS 1.125 (28.58) 0.013 (0.34) 0.915 (23.24) 0.005 (0.12) 0.101 (2.56)114 CTS 1.375 (34.92) 0.013 (0.34) 1.125 (28.58) 0.005 (0.12) 0.121 (3.08)112 CTS 1.625 (41.23) 0.013 (0.34) 1.321 (33.55) 0.005 (0.12) 0.148 (3.76)2 CTS 2.125 (53.98) 0.013 (0.34) 1.731 (43.97) 0.005 (0.12) 0.193 (4.90)DR 9.312 CTS 0.625 (15.88) 0.010 (0.26) 0.483 (12.26) 0.004 (0.10) 0.067 (1.70)34 C
