1、Designation: D3261 121An American National StandardStandard 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
2、 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.This standard has been approved for use by agencies of the U.S. Depa
3、rtment of Defense.1NOTE7.2.2 was editorially corrected in January 2014.1. Scope*1.1 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
4、 pressure, andburst pressure.1.2 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 considered standard.2. Referenced Documents2.1 ASTM Standards:2D1598 Test Me
5、thod for Time-to-Failure of Plastic PipeUnder Constant Internal PressureD1599 Test 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 Pip
6、e and FittingsD2513 Specification for Polyethylene (PE) Gas PressurePipe, Tubing, and FittingsD3350 Specification for Polyethylene Plastics Pipe and Fit-tings MaterialsF412 Terminology Relating to Plastic Piping Systems2.2 Federal Standard:Fed. Std. No. 123 Marking for Shipment (Civil Agencies)32.3
7、Military 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 Ba
8、sis (PDB),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 Streng
9、th (MRS) 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 dimension ratio (DR) for thermoplastic pipethe ratioof diameter to wall thickness
10、. 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 and do not calculate exactly.4. Classification4.1 GeneralThis specification covers butt fusion fittingsintended for use with polyeth
11、ylene pipe and tubing.4.1.1 Fittings covered by this specification are normallymolded. Fittings may be machined from extruded or moldedstock.1This specification is under the jurisdiction of ASTM Committee F17 on PlasticPiping Systems and is the direct responsibility of Subcommittee F17.10 on Fitting
12、s.Current edition approved Aug. 1, 2012. Published December 2012. Originallyapproved in 1973. Last previous edition approved in 2010 as D3261 10a. DOI:10.1520/D3261-12E01.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Ann
13、ual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:/dodssp.daps.dla.mil.4Available from NSF International, P
14、.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, TX 75062, http:/www.plasticpipe.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Bar
15、r Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14.1.2 Fittings fabricated by thermal welding are not in-cluded in this specification.4.1.3 Fittings intended for use in the distribution of naturalgas or petroleum fuels shall also meet the requirements ofSpecification D251
16、3.5. Ordering Information5.1 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.
17、3.3 Dimension ratio 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 requirementsinT
18、able 1 and shall have 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 carbonblac
19、k. Code E material compounds 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
20、or material designation. 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)
21、, ductile iron pipe 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 fusi
22、on shallconform to the 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
23、the areaof fusion shall 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 manufac
24、turerand accepted by 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 up
25、on by the customer and 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
26、 3or Table 4, the tolerance 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 maximu
27、m wallthickness 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 Requirements :7.2.1 Short-Term Rupture Strength for Fittings12 to 12 in.and 90 to 315 mm, Nominal DiameterThe minimum short-term rup
28、ture strength of the fitting and fused pipe or tubingTABLE 1 Specification 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
29、 or 4 3 or 4 3 or 4 44444Flexural modulus $4 $4 $4 $4 $4 $4 $4 $5Tensile 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 BBBB
30、BBBHDB at 73F (23C), PPI TR-4,psi (MPa)630 (4.34) 630 (4.34) 800 (5.52) 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 1212shall not be less than the minimum short-term rupture strengthof the pipe or tubing in the system w
31、hen tested in accordancewith 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
32、Method D1599.7.2.2 Short-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 describe
33、d in 10.2 ofthis specification. 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
34、offered in Table 10. 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 specificat
35、ion. Fittings shall behomogeneous 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 shou
36、ld besampled at a frequency 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 specificati
37、on coverfittings to be 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 methodsapplicable to this specification only are e
38、xplained 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 disagreement.Newly molded fittings shall be condition
39、ed 40 h prior to test.TABLE 2 IPS Sizing System Outside Diameters and Tolerancesfor Fittings 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 0.015
40、6 6.625 0.0188 8.625 0.02510 10.750 0.02712 12.750 0.03614 14.000 0.06316 16.000 0.07218 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
41、outlet extremity.TABLE 3 DIPS Sizing System Outside Diameters and Tolerancesfor Fittings 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 1
42、9.50 0.08820 21.60 0.09724 25.80 0.11630 32.000 0.14436 38.30 0.17242 44.50 0.20048 50.80 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 PipeSizeA
43、verage Outside Diameter at Area of FusionMin MaxA90 90.0 90.8110 110.0 111.0160 160.0 161.4200 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 10
44、09.01200 1200.0 1210.81400 1400.0 1412.61600 1600.0 1614.4ASpecified in ISO 3607.D3261 121310.3 Test ConditionsConduct the tests at the standardlaboratory temperature of 73.4 6 3.6F (23 6 2C) unlessotherwise specified.10.4 Dimensions and Tolerances:10.4.1 Outside DiameterMeasure the outside diameter
45、 ofthe fittings at the area of fusion in accordance with the WallThickness section of Method D2122 by use of a circumferen-tial tape readable to the nearest 0.001 in. (0.02 mm).10.4.2 Inside Diameter (CTS Fittings Only)Use a steppedplug gage to determine the inside diameter of the CTS end ofthe fitt
46、ing. The plug gage shall be of the go/no go type and shallhave12-in. (12.7-mm) land lengths cut to the minimum insidediameter and maximum inside diameter. A fitting is unaccept-able (no go) if it fits snugly on the minimum inside diameterland of the gage or if it fits loosely on the maximum diameter
47、land of the gage.10.4.3 Wall ThicknessMake a series of measurementsusing a cylindrical anvil tubular micrometer or other accuratedevice at closely spaced intervals to ensure that minimum andmaximum wall thicknesses to the nearest 0.001 in. (0.02 mm)have been determined. Make a minimum of six measure
48、mentsat each cross section.TABLE 5 Diameter, Wall Thickness, and Tolerances for Fittings for Use with Plastic TubingTubing Typein. (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
49、CTS34 CTS0.625 (15.88)0.875 (22.22)0.010 (0.26) 0.010 (0.26)0.495 (12.58)0.745 (18.92)0.004 (0.10)0.062 (1.58).0.090 (2.29)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 1134 CTS1 CTS114 CTS0.875 (22.22)1.125 (28.58)1.3
