1、Designation: D2737 12a An American National StandardStandard Specification forPolyethylene (PE) Plastic Tubing1This standard is issued under the fixed designation D2737; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of l
2、ast 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 This specification covers polyet
3、hylene (PE) plastic tub-ing in outside diameters and SDRs that are pressure rated forwater. Included are requirements for PE compounds, andrequirements and test methods for PE plastic tubingworkmanship, dimensions, elevated temperature sustainedpressure, burst pressure and marking.1.2 The text of th
4、is specification references notes, footnotes,and appendixes which provide explanatory material. Thesenotes and footnotes shall not be considered as requirements ofthe specification. Notes and footnotes in tables and figures, andSupplementary Requirements are requirements of the specifi-cation.1.3 Th
5、e 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.NOTE 1Joining PE plastic tubing with fittings that require flaring thetubing is not recomme
6、nded because Practice D3140, the technique used tomake the flare has been withdrawn (discontinued).NOTE 2References and PE compound descriptions for PE2305,PE2406, PE3306, PE3406, and PE3408 have been removed due tochanges in Specification D3350 and PPI TR-3. For removed designations,refer to previo
7、us editions of Specification D2737, Specification D3350,PPI TR-3 and PPI TR-4. The removal of these PE compounds does notaffect pipelines that are in service. PE compounds and material designa-tions resulting from changes in Specification D3350 and PPI TR-3 areaddressed in Section 5.1.4 The followin
8、g safety hazards caveat pertains only to thetest methods portion, Section 7, of this specification: Thisstandard does not purport to address all of the safety concerns,if any, associated with its use. It is the responsibility of the userof this standard to establish appropriate safety and healthprac
9、tices and determine the applicability of regulatory limita-tions prior to use.2. Referenced Documents2.1 ASTM Standards:2D618 Practice for Conditioning Plastics for TestingD638 Test Method for Tensile Properties of PlasticsD1238 Test Method for Melt Flow Rates of Thermoplasticsby Extrusion Plastomet
10、erD1598 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 Terminology forAbbreviated Terms Relating to Plas-ticsD1603 Test Method for Carbon Black Content in Olefi
11、nPlasticsD2122 Test Method for Determining Dimensions of Ther-moplastic Pipe and FittingsD2565 Practice for Xenon-Arc Exposure of Plastics In-tended for Outdoor ApplicationsD2837 Test Method for Obtaining Hydrostatic Design Basisfor Thermoplastic Pipe Materials or Pressure Design Basisfor Thermoplas
12、tic Pipe ProductsD3350 Specification for Polyethylene Plastics Pipe and Fit-tings MaterialsD3140 Practice For Flaring Polyolefin Pipe And Tubing3D4218 Test Method for Determination of Carbon BlackContent in Polyethylene Compounds By the Muffle-Furnace TechniqueF412 Terminology Relating to Plastic Pi
13、ping SystemsG154 Practice for Operating Fluorescent Ultraviolet (UV)Lamp Apparatus for Exposure of Nonmetallic MaterialsG155 Practice for Operating Xenon Arc Light Apparatus forExposure of Non-Metallic Materials2.2 APWA Standard:4APWA Uniform Color Code1This specification is under the jurisdiction o
14、f ASTM Committee F17 on PlasticPiping Systems and is the direct responsibility of Subcommittee F17.26 on OlefinBased Pipe.Current edition approved Nov. 1, 2012. Published December 2012. Originallyapproved in 1968. Last previous edition approved in 2012 as D2737 03. DOI:10.1520/D2737-12A.2For referen
15、ced 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.3Withdrawn. The last approved version of this historical standard is refe
16、rencedon www.astm.org.4APWA, 2345 Grand Boulevard, suite 500, Kansas, City, MO 64108-2641.*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 StatesThis international standard was
17、developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.12.3 NSF Standa
18、rds:5NSF/ANSI Standard No. 14 for Plastic Piping Componentsand Related MaterialsNSF/ANSI Standard No. 61 for Drinking Water SystemsComponentsHealth Effects2.4 PPI Standards:6PPI TR-3 Policies and Procedures for Developing Hydro-static Design Basis (HDB), Pressure Design Basis (PDB),Strength Design B
19、asis (SDB), and Minimum RequiredStrength (MRS) Ratings for Thermoplastic Piping Mate-rials or PipePPI 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) Ratings for Thermop
20、lastic Pip-ing Materials or Pipe3. Terminology3.1 DefinitionsUnless otherwise specified, definitions arein accordance with Terminology F412 and abbreviations are inaccordance with Terminology D1600.4. Tubing Classification4.1 GeneralThis specification covers PE plastic tubingmade from PE compounds i
21、n three standard dimension ratiosand pressure rated for water. Pressure ratings for water aredependent on the PE compound in accordance with thefollowing relationship:PR 52 3HDSSDR11!(1)Where:PR = pressure rating for water, 73F (23C), psi (kPa)HDS = hydrostatic design stress for water at 73F (23C),p
22、si (kPa)SDR = standard dimension ratioNOTE 3PR and HDS must have the same units. See Appendix X1 formaximum pressure ratings for water.4.2 This specification covers PE tubing in standard dimen-sion ratios SDR 7.3, SDR 9, and SDR 11.5. Materials5.1 Polyethylene CompoundPolyethylene compoundssuitable
23、for use in the manufacture of tubing under thisspecification shall meet thermoplastic materials designationcodes PE2708 or PE3608 or PE4608 or PE4710, and shall meetTable 1 requirements for PE2708 or PE3608 or PE4608 orPE4710, and shall meet thermal stability, brittleness tempera-ture and elongation
24、 at break requirements in accordance withSpecification D3350.5.1.1 Color and Ultraviolet (UV) StabilizationPolyethylene compounds shall meet Specification D3350 codeC, D or E. In addition, Code C polyethylene compounds shallhave 2 to 3 percent carbon black, and Code D or E polyethyl-ene compounds sh
25、all have sufficient UV stabilizer to protecttubing from deleterious UV exposure effects during unpro-tected outdoor shipping and storage for at least eighteen (18)months.NOTE 4Pipe users should consult with the pipe manufacturer aboutthe outdoor exposure life of the product under consideration. Eval
26、uationof UV stabilizer in Code D or E PE compound using Practice D2565 or5Available from NSF International, P.O. Box 130140, 789 N. Dixboro Rd., AnnArbor, MI 48113-0140, http:/www.nsf.org.6Available from Plastics Pipe Institute (PPI), 105 Decker Court, Suite 825,Irving, TX 75062, http:/www.plasticpi
27、pe.org.TABLE 1 Polyethylene Compound RequirementsRequirementMaterial DesignationPE2708 PE3608 PE4608 PE4710Required ValueMinimum HDB at 140F(60C), psi (MPa),per Test Method D2837and PPI TR-3800 (5.5)A800 (5.5)A800 (5.5)A800 (5.5)AHDS for water at73F (23C) psi (MPa),per Test Method D2837and PPI TR-3A
28、800 (5.5) 800 (5.5) 800 (5.5) 1000 (6.9)Melt flow rateper Test Method D1238#0.40 g/10 min Cond.190/2.16 or #20 g/10min Cond. 190/21.6#0.15 g/10 minCond. 190/2.16 or#20 g/10 minCond. 190/21.6#0.15 g/10 minCond. 190/2.16 or#20 g/10 minCond. 190/21.6#0.15 g/10 minCond. 190/2.16 or#20 g/10 minCond. 190/
29、21.6Specification D3350Cell ClassificationProperty RequirementRequired ValueDensity (natural base resin) 2 3 4 4SCG Resistance 7 6 6 7Color and UV Stabilizer CodeBC, D or E C, D or E C, D or E C, D or EAContact manufacturer or see PPI TR-4 for listed value.BSee 5.1.1.D2737 12a2Practice G154 or Pract
30、ice G155 may be useful for this purpose.5.1.2 Colors for solid color, an external color layer or colorstripesIn accordance with the APWA Uniform Color Code,blue shall identify potable water service; green shall identifysewer service; and purple (lavender) shall identify reclaimedwater service. Yello
31、w identifies gas service and shall not beused.5.2 Products intended for contact with potable water shallbe evaluated, tested and certified for conformance with NSF/ANSI Standard No. 61 or the health effects portion of NSF/ANSI Standard No. 14 by a certifying organization acceptableto the authority h
32、aving jurisdiction.5.3 Rework MaterialClean polyethylene compound fromthe manufacturers own tubing production that met 5.1 through5.2 as new PE compound is suitable for re-extrusion intotubing when blended with new PE compound having the samematerial designation. Tubing containing rework material sh
33、allmeet all the requirements of this specification.6. Requirements6.1 WorkmanshipThe tubing shall be homogeneousthroughout and free from visible cracks, holes, foreigninclusions, or other defects. The tubing shall be as uniform ascommercially practicable in color, opacity, density, and otherphysical
34、 properties. See 5.1.2.6.2 Dimensions and Tolerances:6.2.1 Outside DiametersThe outside diameters and toler-ances shall be as shown in Table 2 when measured inaccordance with 7.4.6.2.1.1 Out-of-roundnessOut of roundness shall be inaccordance with Table 2 as extruded, but before coiling forpackaging
35、when measured in accordance with 7.4.NOTE 5Coiling may increase out-of-roundness, depending on thecoiling method and coil dimensions.6.2.2 Wall ThicknessesThe wall thicknesses and toleranceshall be as shown in Table 3 when measured in accordancewith 7.4. Wall thickness shall be inclusive of all extr
36、udedconcentric layers.6.2.3 Wall Thickness VariationThe wall thickness varia-tion shall not exceed 12 % when measured in accordance with7.4.6.2.4 Thickness of Outer LayerFor tubing produced bysimultaneous multiple extrusion, the outer concentric layershall be at least 0.020 in (0.5 mm) thick.6.3 Bon
37、dFor tubing produced by simultaneous multipleextrusion, the bond between the layers shall be strong anduniform. It shall not be possible to cleanly separate any twolayers with a probe or point of a knife blade at any point.6.4 Carbon BlackPolyethylene tubing produced usingCode C polyethylene compoun
38、d per 5.1.1 shall contain 2 to 3%carbon black when tested in accordance with 7.5.6.5 Burst PressureThe minimum burst pressure for tubingshall be as given in Table 4, when determined in accordancewith 7.6 using a minimum hoop stress of 2520 psi (17.4 MPa)for Table 1 density cell 2 polyethylene compou
39、nd or 2900 psi(20.0 MPa) for Table 1 density cell 3 or 4 polyethylenecompound. In addition, the failure shall be ductile.6.6 Elevated Temperature Sustained PressureElevatedtemperature sustained pressure tests for each polyethylenecompound designation per Table 1 used in production at thefacility sha
40、ll be conducted twice annually per 7.7.6.7 Inside Surface Ductility for TubingTubing shall betested for inside surface ductility in accordance with 7.8 or 7.9.NOTE 6Tensile elongation testing per 7.9 provides a quantifiableresult and is used for referee testing and in cases of disagreement.7. Test M
41、ethods7.1 ConditioningCondition as specified in the testmethod. Where conditioning is not specified in the test method,condition the test specimens at 73 6 3.6F (23 6 2C) withoutregard to relative humidity for not less than 4 h prior to the testin accordance with Procedure A of Practice D618,orat736
42、3.6F (23 6 2C) for not less than1hinaccordance withProcedure D of Practice D618.7.2 Test ConditionsConduct tests in accordance with theconditions specified in the test method, or if not specified in thetest method, at 73.4 6 3.6F (23 6 2C) without regard torelative humidity.7.3 SamplingThe number an
43、d selection of samples shallbe as specified in the test method, or if not specified in the testmethod, sample selection shall be as agreed upon by thepurchaser and seller. In case of no prior agreement, any sampleselected by the testing laboratory shall be deemed adequate.7.3.1 Test SpecimensNot les
44、s than 50 % of the test speci-mens required for any pressure test shall have at least a part ofthe marking in their central sections. The central section is thatportion of the tubing sample that is at least one pipe diameterTABLE 2 Outside Diameters and Tolerances for PE Plastic TubingTubingSizeOuts
45、ideDiameter,in. (mm)Outside DiameterTolerance, in. (mm)Out-of-Roundness,in. (mm)12 0.625 (15.87 0.004 (0.10) 0.030 (0.76)58 0.750 (19.05) 0.004 (0.10) 0.030 (0.76)34 0.875 (22.23) 0.004 (0.10) 0.030 (0.76)1 1.125 (28.58) 0.005 (0.13) 0.030 (0.76)114 1.375 (34.93) 0.005 (0.13) 0.030 (0.76)112 1.625 (
46、41.23) 0.006 (0.15) 0.030 (0.76)2 2.125 (53.98) 0.006 (0.15) 0.030 (0.76)D2737 12a3away from an end closure. The entire marking shall bedocumented in testing records.7.4 Dimensions and TolerancesUse any length of tubingto determine the dimensions. Outside diameter, out-of-roundness, and wall thickne
47、ss shall be measured in accordancewith Test Method D2122.7.4.1 Outside DiameterMeasure the outside diameter ofthe tubing in accordance withTest Method D2122.The averageoutside diameter is the arithmetic average of the maximum andminimum diameter at any cross section. The tolerance forout-of-roundnes
48、s shall apply only to tubing prior to shipment.7.5 Carbon BlackFor all tubing manufactured with CodeC polyethylene compound, determine in duplicate the carbonblack content in accordance with Test Method D1603 or TestMethod D4218.7.6 Burst PressureThe test equipment, procedures andfailure definitions
49、 shall be as specified in Test Method D1599.7.7 Elevated Temperature Sustained Pressure TestElevated temperature sustained pressure tests for each Table 1material designation used in production of tubing in accor-dance with this specification at the facility shall be conductedper D1598, and Table 5 using water as the pressurizingmedium. The “test sample” shall be three specimens of anytubing size or SDR. One Table 5 Condition for the applicablematerial designation shall be selected for the test.7.7.1 For the se
