1、Designation: D3261 121D3261 15Standard 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
2、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. Department of Defense.1 N
3、OTE7.2.2 was editorially corrected in January 2014.1. Scope*1.1 This specification covers polyethylene (PE) butt fusion fittings for use with polyethylene pipe (IPS, DIPS, and ISO) andtubing (CTS). Included are requirements for materials, workmanship, dimensions, marking, sustained pressure, and bur
4、st pressure.1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information only and are not considered standard.2. Referenced Documents2.1 ASTM Standards:2D1598 Test Method for Time-t
5、o-Failure of Plastic Pipe Under Constant Internal PressureD1599 Test Method for Resistance to Short-Time Hydraulic Pressure of Plastic Pipe, Tubing, and FittingsD1600 Terminology for Abbreviated Terms Relating to PlasticsD2122 Test Method for Determining Dimensions of Thermoplastic Pipe and Fittings
6、D2513 Specification for Polyethylene (PE) Gas Pressure Pipe, Tubing, and FittingsD3350 Specification for Polyethylene Plastics Pipe and Fittings MaterialsF412 Terminology Relating to Plastic Piping Systems2.2 Federal Standard:Fed. Std. No. 123 Marking for Shipment (Civil Agencies)32.3 Military Stand
7、ard:MIL-STD-129 Marking for Shipment and Storage32.4 National Sanitation Foundation Standard:Standard No. 14 for Plastic Piping Components and Related Materials42.5 Plastic Pipe Institute5PPI TR-3 Policies and Procedures for Developing Hydrostatic Design Basis (HDB), Pressure Design Basis (PDB), Str
8、engthDesign Basis (SDB), and Minimum Required Strength (MRS) Ratings for Thermoplastic Piping Materials or Pipe7PPI TR-4 HDB/SDB/PDB/MRS Listed Materials, PPI Listing of Hydrostatic Design Basis (HDB), Strength Design Basis(SDB), Pressure Design Basis (PDB), and Minimum Required Strength (MRS) Ratin
9、gs for Thermoplastic Piping Materialsor Pipe3. Terminology3.1 Definitions are in accordance with Terminology F412 and abbreviations are in accordance with Terminology D1600, unlessotherwise specified.1 This specification is under the jurisdiction of ASTM Committee F17 on Plastic Piping Systems and i
10、s the direct responsibility of Subcommittee F17.10 on Fittings.Current edition approved Aug. 1, 2012Dec. 15, 2015. Published December 2012January 2016. Originally approved in 1973. Last previous edition approved in 20102012as D3261 10a.D3261 121. DOI: 10.1520/D3261-12E01.10.1520/D3261-15.2 For refer
11、encedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3 Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
12、Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:/dodssp.daps.dla.mil.DLADocument Services Building 4/D 700 Robbins Avenue Philadelphia, PA 19111-5094 http:/quicksearch.dla.mil/4 Available from NSF International, P.O. Box 130140, 789 N. Dixboro Rd., Ann Arbor, MI 48113-0140, http:/www.
13、nsf.org.5 Available from Plastics Pipe Institute (PPI), 105 Decker Court, Suite 825, Irving, TX 75062, http:/www.plasticpipe.org.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Be
14、causeit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section app
15、ears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13.2 dimension ratio (DR) for thermoplastic pipethe ratio of diameter to wall thickness. For this specification it is calculatedby dividing the specified o
16、utside diameter by the specified wall thickness of the fitting at its area of fusion. DRs are rounded anddo not calculate exactly.4. Classification4.1 GeneralThis specification covers butt fusion fittings intended for use with polyethylene pipe and tubing.4.1.1 Fittings covered by this specification
17、 are normally molded. Fittings may be machined from extruded or molded stock.4.1.2 Fittings fabricated by thermal welding are not included in this specification.4.1.3 Fittings intended for use in the distribution of natural gas or petroleum fuels shall also meet the requirements ofSpecification D251
18、3.5. Ordering Information5.1 When ordering fittings under this specification, the following should be specified:5.1.1 Polyethylene compound (material designation or trade name)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.
19、1.3.3 Dimension ratio number or schedule number.6. Materials6.1 Polyethylene CompoundPolyethylene material compounds suitable for use in the manufacture of fittings under thisspecification shall meet Specification D3350 and shall meet the Specification D3350 classification and property requirementsi
20、nTable 1 and shall have PPI TR-4 HDB and HDS listings at 73F (23C) and HDB listings 140F (60C) in accordance with Table1.6.2 Color and Ultraviolet (UV) StabilizationPolyethylene material compounds shall meet Specification Table 1 code C or E.Code C material compounds shall have 2 to 3 percent carbon
21、 black. Code E material compounds shall be colored with UVstabilizer.6.3 Rework MaterialClean polyethylene compound from the manufacturers own production that met 6.1 and 6.2 as virginmaterial is suitable for remolding into fittings, either alone or blended with new compound of the same cell classif
22、ication ormaterial designation. Fittings containing the rework material shall meet the material and product requirements of this specification.7. Requirements7.1 Dimensions and Tolerances:7.1.1 Outside DiameterNominal outside diameters of butt fusion fittings shall conform to the nominal iron pipe s
23、ize (IPS),ductile iron pipe size (DIPS)or copper tubing size (CTS) dimensions at area of fusion. These dimensions and tolerances shall beas shown in Table 2, Table 3, Table 4 and of this specification.7.1.2 Inside Diameter (CTS Fittings Only)Inside diameters of butt fusion fittings for tubing at are
24、a of fusion shall conformto the dimensions of the tubing being joined. The dimensions and tolerances for the fittings are shown in Table 5.TABLE 1 Specification D3350 Classification of Polyethylene Fittings MaterialsPhysical Properties Cell Classification and Properties for Polyethylene Pipe Materia
25、lsPE2606 PE2706 PE2708 PE3608 PE3708 PE3710 PE4708 PE4710Density 2 2 2 3 3 3 4 4Melt Index 3 or 4 3 or 4 3 or 4 4 4 4 4 4Flexural modulus $4 $4 $4 $4 $4 $4 $4 $5Tensile Strength $3 $3 $3 $4 $4 $4 $4 $4Slow crack growth resistance(F1473)6 7 7 6 7 7 7 7Hydrostatic strength classifica-tion3 3 3 4 4 4 4
26、 4Color and UV StabilizerA C or E C or E C or E C or E C or E C or E C or E C or EHDB at 140F (60C), PPI TR-4,psi (MPa)B B B B B B B BHDB 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)A See 6.2.B Listing required; consult manufa
27、cturer for listed value.D3261 1527.1.3 Wall ThicknessThe wall thicknesses of butt fusion fittings shall not be less than the minimum specified for the pipe ortubing. The wall thicknesses and tolerances at the area of fusion shall be as shown in Table 5, Table 6, Table 7, and Table 8 ofthis specifica
28、tion.7.1.4 MeasurementsThese shall be made in accordance with Test Method D2122 for roundable pipe.7.1.5 Design DimensionsOverall fitting dimensions may be as preferred from a design standpoint by the manufacturer andaccepted by the purchaser consistent with 7.1.3.7.1.6 Special SizesWhere existing s
29、ystem conditions or special local requirements make other diameters or dimension ratiosnecessary, other sizes or dimension ratios, or both, shall be acceptable for engineered applications when mutually agreed upon bythe customer and the manufacturer, if the fitting is manufactured from plastic compo
30、unds meeting the material requirements of thisspecification, and the strength and design requirements are calculated on the same basis as those used in this specification. Fordiameters not shown in Table 2, Table 3 or Table 4, the tolerance shall be the same percentage as that shown in the correspon
31、dingtables for the next smaller listed size. Minimum wall thickness for these special sizes shall not be less than the minimum wallspecified for the pipe or tubing the fitting is designed to be used with. The maximum wall thickness allowed shall not be greaterthan 20 % thicker than the specified min
32、imum wall, and shall be determined by 10.4.3 of this specification.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
33、 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 0.07218 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 0.216A Defined as meas
34、ured 14 to 12 in. (6.4 to 12.7 mm) from fitting outlet extremity.TABLE 3 DIPS Sizing System Outside Diameters and Tolerancesfor Fittings for Use with Polyethylene Pipe, in.Nominal Pipe Size Average Outside Diameterat Area of Fusion ToleranceA3 3.96 0.0164 4.80 0.0226 6.90 0.0318 9.05 0.04110 11.10 0
35、.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 50.80 0.229A Defined as measured 14 to 12 in. (6.4 to 12.7) from fitting outlet extremity.D3261 1537.2 Pressure Test Requirements :7.2.1 Short-Term Rupture Strength f
36、or Fittings 12 to 12 in. and 90 to 315 mm, Nominal DiameterThe minimum short-termrupture strength of the fitting and fused pipe or tubing shall not be less than the minimum short-term rupture strength of the pipeor tubing in the system when tested in accordance with 10.5.3. These minimum pressures s
37、hall be as shown in Table 9 of thisspecification. Test specimens shall be prepared for testing in the manner described in 10.5.1 of this specification. The testequipment, procedures, and failures definitions shall be as specified in Test Method D1599.7.2.2 Short-Term Strength for Fittings 14 to 48 i
38、n. and 355 to 1600 mm, Nominal DiameterFittings shall not fail when testedin accordance with 10.5.4. The minimum pressure shall be as shown in Table 9 of this specification. Test specimens shall beprepared for testing in the manner described in 10.2 of this specification. The test equipment and proc
39、edures shall be as specifiedin Test Method D1599.7.2.3 Sustained PressureThe fitting and fused pipe or tubing shall not fail, as defined in Test Method D1598, when tested atthe time, pressures, and test temperatures selected from test options offered in Table 10. The test specimens shall be prepared
40、 fortesting in the manner prescribed in 10.5.1.8. Workmanship, Finish, and Appearance8.1 The manufacture of these fittings shall be in accordance with good commercial practice so as to produce fittings meetingthe requirements of this specification. Fittings shall be homogeneous throughout and free o
41、f cracks, holes, foreign inclusions, orother injurious defects. The fittings shall be as uniform as commercially practicable in color, opacity, density, and other physicalproperties.9. Sampling9.1 Parts made for sale under this specification should be sampled at a frequency appropriate for the end u
42、se intended. Whenthe fittings are to be installed under a system specification (such as Specification D2513 for gas), the minimum requirements ofthat specification must be satisfied.10. Test Methods10.1 GeneralThe test methods in this specification cover fittings to be used with pipe and tubing for
43、gas, water, and otherengineered piping systems.Test methods that are applicable from other specifications will be referenced in the paragraph pertainingto the particular test. Certain special test methods applicable to this specification only are explained in the appropriate paragraph.10.2 Condition
44、ingUnless otherwise specified, condition the specimens prior to test at 73.4 6 3.6F (23 6 2C) for not lessthan 6 h in air, or 1 h in water, for those tests where conditioning is required and in all cases of disagreement. Newly molded fittingsshall be conditioned 40 h prior to test.10.3 Test Conditio
45、nsConduct the tests at the standard laboratory temperature of 73.4 6 3.6F (23 6 2C) unless otherwisespecified.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 90.8
46、110 110.0 111.0160 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 1009.01200 1200.0 1210.81400 1400.0 1412.61600 1600.0 1614.4A S
47、pecified in ISO 3607.D3261 154TABLE 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)
48、 12 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).0.062 (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 (2.29) 12 CTS 0.625 (15.88) 0.010 (0.26) 0
49、.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 11 34 CTS1 CTS114 CTS0.875 (22.22)1.125 (28.58)1.375 (34.92)0.010 (0.26)0.013 (0.34)0.013 (0.34)0.715 (18.16)0.915 (23.24)1.125 (28.58)0.004 (0.10)0.005 (0.12)0.005 (0.12)0.077 (1.96)0
