1、Designation: D3350 10Standard Specification forPolyethylene Plastics Pipe and Fittings Materials1This standard is issued under the fixed designation D3350; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision.
2、A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers the identification of polyeth-ylene plastic pipe and fittings materials in accordance with acell classific
3、ation system. It is not the function of this specifi-cation to provide specific engineering data for design purposes,to specify manufacturing tolerances, or to determine suitabilityfor use for a specific application.1.2 Polyethylene plastic materials, being thermoplastic, arereprocessable and recycl
4、able (Note 2). This specification al-lows for the use of those polyethylene materials, provided thatall specific requirements of this specification are met.NOTE 1The notes in this specification are for information only andshall not be considered part of this specification.NOTE 2See Guide D5033 for i
5、nformation and definitions related torecycled plastics.1.3 The values stated in SI units are to be regarded asstandard.1.4 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-pri
6、ate safety and health practices and determine the applica-bility of regulatory limitations prior to use.NOTE 3There is no known ISO equivalent to this standard.1.5 For information regarding molding and extrusion mate-rials see Specification D4976. For information regarding wireand cable materials se
7、e Specification D1248.2. Referenced Documents2.1 ASTM Standards:2D618 Practice for Conditioning Plastics for TestingD638 Test Method for Tensile Properties of PlasticsD746 Test Method for Brittleness Temperature of Plasticsand Elastomers by ImpactD790 Test Methods for Flexural Properties of Unreinfo
8、rcedand Reinforced Plastics and Electrical Insulating MaterialsD792 Test Methods for Density and Specific Gravity (Rela-tive Density) of Plastics by DisplacementD883 Terminology Relating to PlasticsD1238 Test Method for Melt Flow Rates of Thermoplasticsby Extrusion PlastometerD1248 Specification for
9、 Polyethylene Plastics ExtrusionMaterials for Wire and CableD1505 Test Method for Density of Plastics by the Density-Gradient TechniqueD1603 Test Method for Carbon Black Content in OlefinPlasticsD1693 Test Method for Environmental Stress-Cracking ofEthylene PlasticsD1898 Practice for Sampling of Pla
10、stics3D2837 Test Method for Obtaining Hydrostatic Design Basisfor Thermoplastic Pipe Materials or Pressure Design Basisfor Thermoplastic Pipe ProductsD2839 Practice for Use of a Melt Index Strand for Deter-mining Density of PolyethyleneD3892 Practice for Packaging/Packing of PlasticsD4218 Test Metho
11、d for Determination of Carbon BlackContent in Polyethylene Compounds By the Muffle-Furnace TechniqueD4703 Practice for Compression Molding ThermoplasticMaterials into Test Specimens, Plaques, or SheetsD4883 Test Method for Density of Polyethylene by theUltrasound TechniqueD4976 Specification for Pol
12、yethylene Plastics Molding andExtrusion MaterialsD5033 Guide for Development of ASTM Standards Relat-ing to Recycling and Use of Recycled Plastics3F1473 Test Method for Notch Tensile Test to Measure theResistance to Slow Crack Growth of Polyethylene Pipesand Resins2.2 ISO Standard:ISO 12162 Thermopl
13、astic Materials for Pipes and Fittingsfor Pressure ApplicationsClassification and1This specification is under the jurisdiction of ASTM Committee D20 onPlastics and is the direct responsibility of Subcommittee D20.15 on ThermoplasticMaterials.Current edition approved Jan. 1, 2010. Published February
14、2010. Originallyapproved in 1974. Last previous edition approved in 2008 as D3350 - 08. DOI:10.1520/D3350-10.2For 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 sta
15、ndards Document Summary page onthe ASTM website.3Withdrawn.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.DesignationOverall Service (Design) Coefficient3. Terminolog
16、y3.1 DefinitionsTerms as described in Terminology D883shall apply in this specification.3.1.1 polyethylene plasticsas defined by this specification,plastics or resins prepared by the polymerization of no less than85 % ethylene and no less than 95 % of total olefins withadditional compounding ingredi
17、ents.3.2 Definitions of Terms Specific to This Standard:3.2.1 materialspolyethylene (PE) resins with the addedcompounding ingredients.3.2.2 PE compoundshas the same meaning as PE plasticsmaterials, compounds, and plastics.3.3 Historical usage and user group conventions have re-sulted in inconsistent
18、 terminology used to categorize anddescribe polyethylene resins and compounds. The followingterminology is in use in ASTM specifications pertaining topolyethylene:3.3.1 Specification D1248:3.3.1.1 Type (0, I, II, III, IV) = density ranges (same,respectively, as Class in Specification D4976).3.3.1.2
19、Class (A, B, C, D) = composition and use.3.3.1.3 Category (1, 2, 3, 4, 5) = melt index ranges (same asGrade in Specification D4976).3.3.1.4 Grade (E, J, D, or W followed by one or two digits)= specific requirements from tables.3.3.2 Specification D3350:3.3.2.1 Type (I, II, III) = density ranges (sam
20、e as Types I, II,and III in Specification D1248 and Classes 1, 2, and 3 inSpecification D4976).3.3.2.2 Class = a line callout system consisting of “PE”followed by six cell numbers from Table 1 plus a letter (A, B,C, D, E) denoting color and UV stabilizer.3.3.2.3 Grade = simplified line callout syste
21、m using “PE”followed by density and slow crack growth cell numbers fromTable 1.3.3.3 Specification D4976:3.3.3.1 Group (1, 2) = branched or linear polyethylene.3.3.3.2 Class (0, 1, 2, 3, 4) = density ranges (same,respectively, as Type in Specification D1248).3.3.3.3 Grade (1, 2, 3, 4, 5) = melt inde
22、x ranges (same asCategory in Specification D1248).4. Classification4.1 Polyethylene plastic pipe and fittings compounds areclassified in accordance with density, melt index, flexuralmodulus, tensile strength at yield, slow crack growth resis-tance, and hydrostatic strength classification in Table 1.
23、NOTE 4It has been a long-standing practice to use the following termsin describing polyethylene plastics:Type I (0.910 to 0.925) = Low DensityType II (0.926 to 0.940) = Medium DensityTABLE 1 Primary PropertiesACell Classification LimitsProperty Test Method 0 1 2 3 4 5 6 7 81. Density, g/cm3D1505 Uns
24、pecified 0.925 orlower0.925-0.9400.940-0.9470.947-0.9550.955 . . . SpecifyValue2. Melt index D1238 Unspecified 1.0 1.0 to0.41103(160 000)SpecifyValue4. Tensile strengthat yield, MPa (psi)D638 Unspecified 28(4000)SpecifyValue5. Slow CrackGrowth ResistanceI. ESCR D1693 Unspecifieda. Test condition(100
25、% Igepal.)A B C C . . . . . . . . . SpecifyValueb. Test duration, h 48 24 192 600c. Failure, max, % Unspecified 50 50 20 20II. PENT (hours) F1473Molded plaque,80C, 2.4 MPaUnspecified . . . . . . . . . 10 30 100 500 SpecifyValueNotch depth,F1473, Table 1Unspecified6. Hydrostatic StrengthClassificatio
26、nI. Hydrostatic designbasis, MPa (psi), (23C)D2837 NPRC5.52(800)6.89(1000)8.62(1250)11.03(1600). .II. Minimum requiredstrength, MPa (psi), (20C)ISO 12162 . . . . . 8(1160)10(1450)ACompliance with physical properties in accordance with Section 8 is required including requirements for cell classificat
27、ion, color, and ultraviolet (UV) stabilizer, thermalstability, brittleness temperature, density, tensile strength at yield, and elongation at break.BRefer to 10.1.4.1.CNPR = Not Pressure Rated.D3350 102Type III (0.941 to 0.965) = High DensityNOTE 5The manner in which materials are identified in the
28、cellclassification is illustrated for Class PE233424B as follows (refer also toTable 1 and 6.2):Class233424BDensity (0.9260.940 g/cm3)Melt Index (0.40.15)Flexural Modulus (276552 MPa)Tensile Strength at yield(2124 MPa (30003500 psi)Slow Crack Growth ResistanceI. ESCR D1693Condition B, 24 h, 50% max
29、failureII. PENT F1473Average1hfailureHydrostatic design basis at 23C(11.03 MPa (1600 psi)Color and UV stabilizer (colored)4.2 Materials used in polyethylene plastic pipe and fittingsshall use a cell-type format for the identification, close char-acterization, and specification of material properties
30、. Theinformation from the format is to be used alone or incombination.NOTE 6This type format, however, is subject to possible misapplica-tion since unobtainable property combinations can be selected if the useris not familiar with commercially available materials. The manufacturershould be consulted
31、. Additionally, the appropriate ASTM standard speci-fication should be reviewed to assure materials utilized will meet all thematerial and piping requirements as specified in the standard.4.3 GradeA code for polyethylene pipe and fittings ma-terials that consists of the two letter abbreviation for p
32、olyeth-ylene (PE) followed by two numbers that designate the densitycell (Property 1) and the slow crack growth resistance cell(Property 5), as defined by either Test Method F1473 or TestMethod D1693, of the thermoplastic, as specified in Table 1.For the requirements of Property 5 (slow crack growth
33、 resis-tance), consult the materials section of the appropriate ASTMstandard specification for the end-use application.NOTE 7Grade designations were adapted from SpecificationD1248 - 84 prior to the removal of pipe material from D1248 - 84. FormerSpecification D1248 - 84 grades for PE pipe materials
34、 were P14, P23,P24, P33, and P34. Equivalent Specification D3350 grade designations forthese materials are PE11, PE20, PE23, PE30, and PE33, respectively.5. Materials and Manufacture5.1 The molding and extrusion material shall be polyethyl-ene plastic in the form of powder, granules, or pellets.5.2
35、The molding and extrusion materials shall be as uniformin composition and size and as free of contamination as isachieved by good manufacturing practice. If necessary, thelevel of contamination may be agreed upon between themanufacturer and the purchaser.5.3 When specified, the color and translucenc
36、e of molded orextruded pieces formed, under the conditions specified by themanufacturer of the materials, shall be comparable withincommercial match tolerances to the color and translucence ofstandard samples supplied in advance by the manufacturer ofthe material.6. Physical Properties6.1 Cell Class
37、ificationTest values for specimens of the PEmaterial prepared as specified in Section 9 and tested inaccordance with Section 10 shall conform to the requirementsgiven in Table 1. A typical property value for a PE material isto be the average value from testing numerous lots or batchesand determines
38、the cell number. When, due to manufacturingtolerances and testing bias, individual lot or batch values fallinto the adjoining cell, the individual value shall not beconsidered acceptable unless the user, or both the user and theproducer, determine that the individual lot or batch is suitablefor its
39、intended purpose.6.2 Color and Ultraviolet (UV) StabilizerThe color andUV stabilization shall be indicated at the end of the cellclassification by means of a letter designation in accordancewith the following code:Code Letter Color and UV StabilizerA NaturalB ColoredC Black with 2 % minimum carbon b
40、lackD Natural with UV stabilizerE Colored with UV stabilizer6.3 Thermal StabilityThe PE material shall contain suffi-cient antioxidant so that the minimum induction temperatureshall be 220C when tested in accordance with 10.1.9.6.4 Brittleness TemperatureThe brittleness temperatureshall not be warme
41、r than 60C when tested in accordancewith Test Method D746.6.5 DensityThe density used to classify the material shallbe the density of the PE base resin (uncolored PE) determinedin accordance with 10.1.3. When the average density of any lotor shipment falls within 60.002 g/cm3of the nominal value, it
42、shall be considered as conforming to the nominal value and toall classifications based on the nominal value.6.5.1 For black compounds, containing carbon black, deter-mine the density, Dp, and calculate the resin density, Dr,asfollows:Dr5Dp20.0044Cwhere:C = weight percent of carbon black.6.5.2 For co
43、lored compounds, the nominal density of thebase resin shall be provided by the manufacturer, on request.6.6 Tensile Strength at YieldThe tensile strength at yieldused to classify the material shall be the tensile strength at yieldof the PE resin determined in accordance with 10.1.6. Whenthe average
44、tensile strength at yield of any lot or shipment fallswithin 63.45 MPa (6500 psi) of the nominal value, it shall beconsidered as conforming to the nominal value and to allclassifications based on the nominal value.6.7 Elongation at BreakAs tested in accordance with10.1.6, all pressure rated material
45、s shall have a minimumextension at break of 500 %.7. Sampling7.1 A batch or lot shall be considered as a unit of manufac-ture and shall consist of one production run or as a blend of twoor more production runs of material.D3350 1037.2 Unless otherwise agreed upon between the manufacturerand the purc
46、haser, the material shall be sampled in accordancewith the procedure described in Sections 9 through 12 ofPractice D1898. Adequate statistical sampling prior to packag-ing shall be considered an acceptable alternative.NOTE 8A sample taken from finished product may not necessarilyrepresent the origin
47、al batch or lot.8. Number of Tests8.1 The requirements identified by the material designationand otherwise specified in the purchase order shall be verifiedby tests made in accordance with 11.1. For routine inspection,only those tests necessary to identify the material to thesatisfaction of the purc
48、haser shall be required. One sampleshall be sufficient for testing each batch or lot provided that theaverage values for all of the tests made on that batch or lotcomply with the specified requirements.9. Specimen Preparation9.1 Unless otherwise specified in Section 10, the test speci-mens shall be
49、molded in accordance with Procedure C ofAnnex A1 of Practice D4703.9.2 When pipe or fitting test specimens are required, theyshall be extruded or molded in accordance with the specifica-tions of the material manufacturer.10. Test Methods10.1 The properties enumerated in this specification shall bedetermined in accordance with the following test methods:10.1.1 ConditioningUnless otherwise specified in the testmethods or in this specification, for those tests where condi-tioning is required, condition the molded test specimens inaccordance with Pr
