1、Designation: D3350 121D3350 14Standard 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 r
2、evision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1 NOTEEditorial corrections were made in April 2013.1. Scope*1.1 This specification covers the identification of polyethylene plastic pi
3、pe and fittings materials in accordance with a cellclassification system. It is not the function of this specification to provide specific engineering data for design purposes, to specifymanufacturing tolerances, or to determine suitability for use for a specific application.1.2 Polyethylene plastic
4、 materials, being thermoplastic, are reprocessable and recyclable (Note 2). This specification allows forthe use of those polyethylene materials, provided that all specific requirements of this specification are met.NOTE 1The notes in this specification are for information only and shall not be cons
5、idered part of this specification.NOTE 2See Guide D5033 for information and definitions related to recycled plastics.1.3 The values stated in SI units are to be regarded as standard.1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the r
6、esponsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use.NOTE 3There is no known ISO equivalent to this standard.1.5 For information regarding molding and extrusion materials see Specification
7、 D4976. For information regarding wire andcable materials see 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 Plastics and Elastomers b
8、y ImpactD790 Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating MaterialsD792 Test Methods for Density and Specific Gravity (Relative Density) of Plastics by DisplacementD883 Terminology Relating to PlasticsD1238 Test Method for Melt Flow Rates of
9、Thermoplastics by Extrusion PlastometerD1248 Specification for Polyethylene Plastics Extrusion Materials for Wire and CableD1505 Test Method for Density of Plastics by the Density-Gradient TechniqueD1603 Test Method for Carbon Black Content in Olefin PlasticsD1693 Test Method for Environmental Stres
10、s-Cracking of Ethylene PlasticsD1898 Practice for Sampling of Plastics (Withdrawn 1998)3D2837 Test Method for Obtaining Hydrostatic Design Basis for Thermoplastic Pipe Materials or Pressure Design Basis forThermoplastic Pipe ProductsD2839 Practice for Use of a Melt Index Strand for Determining Densi
11、ty of PolyethyleneD3035 Specification for Polyethylene (PE) Plastic Pipe (DR-PR) Based on Controlled Outside DiameterD3892 Practice for Packaging/Packing of Plastics1 This specification is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.1
12、5 on Thermoplastic Materials.Current edition approved April 1, 2012Nov. 1, 2014. Published May 2012December 2014. Originally approved in 1974. Last previous edition approved in 20102012 asD3350 - 10D3350 121A DOI: 10.1520/D3350-12E01.10.1520/D3350-14.2 For referencedASTM standards, visit theASTM web
13、site, 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 The last approved version of this historical standard is referenced on www.astm.org.This document is not an
14、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. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In
15、 all cases only the current versionof the standard as published by ASTM is to be considered the official document.*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 States1D4218 T
16、est Method for Determination of Carbon Black Content in Polyethylene Compounds By the Muffle-Furnace TechniqueD4703 Practice for Compression Molding Thermoplastic Materials into Test Specimens, Plaques, or SheetsD4883 Test Method for Density of Polyethylene by the Ultrasound TechniqueD4976 Specifica
17、tion for Polyethylene Plastics Molding and Extrusion MaterialsD5033 Guide for Development of ASTM Standards Relating to Recycling and Use of Recycled Plastics (Withdrawn 2007)3F1473 Test Method for Notch Tensile Test to Measure the Resistance to Slow Crack Growth of Polyethylene Pipes and ResinsF226
18、3 Test Method for Evaluating the Oxidative Resistance of Polyethylene (PE) Pipe to Chlorinated Water2.2 ISO Standard:ISO 12162 Thermoplastic Materials for Pipes and Fittings for Pressure ApplicationsClassification and DesignationOverallService (Design) Coefficient3. Terminology3.1 Definitions:3.1.1
19、Terms as described in Terminology D883 shall apply in this specification.3.1.2 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 with additional compounding ingredients.3.2 Defi
20、nitions of Terms Specific to This Standard:3.2.1 materialspolyethylene (PE) resins with the added compounding ingredients.3.2.2 PE compoundshas the same meaning as PE plastics materials, compounds, and plastics.3.3 Historical usage and user group conventions have resulted in inconsistent terminology
21、 used to categorize and describepolyethylene resins and compounds. The following terminology is in use in ASTM specifications pertaining to polyethylene: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 Class (A,
22、 B, C, D) = composition and use.3.3.1.3 Category (1, 2, 3, 4, 5) = melt index ranges (same as Grade 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 (same as Ty
23、pes 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 system usi
24、ng “PE” followed by density and slow crack growth cell numbers from Table1.3.3.3 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 index r
25、anges (same as Category in Specification D1248).4. Classification4.1 Polyethylene plastic pipe and fittings compounds are classified in accordance with density, melt index, flexural modulus,tensile strength at yield, slow crack growth resistance, and hydrostatic strength classification in Table 1.NO
26、TE 4It has been a long-standing practice to use the following terms in describing polyethylene plastics:Type I (0.910 to 0.925) = Low DensityType II (0.926 to 0.940) = Medium DensityType III (0.941 to 0.965) = High DensityNOTE 5The manner in which materials are identified in the cell classification
27、is illustrated for Class PE233424B as follows (refer also to Table 1 and6.2):Class2 3 3 4 2 4 BDensity (0.9260.940 g/cm3)Melt Index (0.925-0.9400.940-0.9470.947-0.9550.955 . . . SpecifyValue2. Melt index D1238 Unspecified 1.0 1.0 to0.41103(160 000)SpecifyValue4. Tensile strengthat yield, MPa (psi)D6
28、38 Unspecified 28(4000)SpecifyValue5. Slow CrackGrowth ResistanceI. ESCR D1693 Unspecifieda. Test condition(100% Igepal.)DA 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 . . .
29、 . . . . . . 10 30 100 500 SpecifyValueNotch depth,F1473, Table 1Unspecified6. Hydrostatic StrengthClassificationI. Hydrostatic designbasis, MPa (psi), (23C)D2837 NPRE 5.52(800)6.89(1000)8.62(1250)11.03(1600). . . . . .II. Minimum requiredstrength, MPa (psi), (20C)ISO 12162 . . . . . . . . . . . . .
30、 . . 8(1160)10(1450)ACompliance with physical properties in accordance with Section 8 is required including requirements for cell classification, color, and ultraviolet (UV) stabilizer, thermalstability, brittleness temperature, density, tensile strength at yield, and elongation at break.B ReferRefe
31、r to 10.1.4.1.C ReferRefer to 10.1.4.2.DThere are environmental concerns regarding the disposal of Nonylphenoxy poly(ethyleneoxy) ethanol (CAS 68412-54-4) for example, Igepal CO-630. Users are advisedto consult their supplier or local environmental office and follow the guidelines provided for the p
32、roper disposal of this chemical.E NPRNPR = Not Pressure Rated.D3350 1435.3 When specified, the color and translucence of molded or extruded pieces formed, under the conditions specified by themanufacturer of the materials, shall be comparable within commercial match tolerances to the color and trans
33、lucence of standardsamples supplied in advance by the manufacturer of the material.6. Physical Properties6.1 Cell ClassificationTest values for specimens of the PE material prepared as specified in Section 9 and tested in accordancewith Section 10 shall conform to the requirements given in Table 1.
34、A typical property value for a PE material is to be the averagevalue from testing numerous lots or batches and determines the cell number. When, due to manufacturing tolerances and testingbias, individual lot or batch values fall into the adjoining cell, the individual value shall not be considered
35、acceptable unless theuser, or both the user and the producer, determine that the individual lot or batch is suitable for its intended purpose.6.2 Color and Ultraviolet (UV) StabilizerThe color and UV stabilization shall be indicated at the end of the cell classificationby means of a letter designati
36、on in accordance with the following code:Code Letter Color and UV StabilizerA NaturalB ColoredC Black with a carbon black inthe range as noted in 6.2.1 and 6.2.2D Natural with UV stabilizerE Colored with UV stabilizer6.2.1 For PE compounds with a hydrostatic strength classification cell class 0 (not
37、 pressure-rated), the carbon black content shallbe in the range of 2.0 % to 4.0 %.6.2.2 For PE compounds with a hydrostatic strength classification other than cell class 0, the carbon black content shall be inthe range of 2.0 % to 3.0 %.6.3 Thermal StabilityThe PE material shall contain sufficient a
38、ntioxidant so that the minimum induction temperature shall be220C when tested in accordance with 10.1.9.FIG. 1 Mounting Film Specimen in CupD3350 1446.4 Brittleness TemperatureThe brittleness temperature shall not be warmer than 60C when tested in accordance with TestMethod D746.6.5 DensityThe densi
39、ty used to classify the material shall be the density of the PE base resin (uncolored PE) determined inaccordance with 10.1.3. When the average density of any lot or shipment falls within 60.002 g/cm3 of the nominal value, it shallbe considered as conforming to the nominal value and to all classific
40、ations based on the nominal value.6.5.1 For black compounds, containing carbon black, determine the density, Dp, and calculate the resin density, Dr, as follows:Dr5Dp20.0044Cwhere:C = weight percent of carbon black.6.5.2 For colored compounds, the nominal density of the base resin shall be provided
41、by the manufacturer, on request.6.6 Tensile Strength at YieldThe tensile strength at yield used to classify the material shall be the tensile strength at yield ofthe PE resin determined in accordance with 10.1.6. When the average tensile strength at yield of any lot or shipment falls within63.45 MPa
42、 (6500 psi) of the nominal value, it shall be considered as conforming to the nominal value and to all classificationsbased on the nominal value.6.7 Elongation at BreakAs tested in accordance with 10.1.6, all pressure rated materials shall have a minimum extension atbreak of 400 %.6.8 Oxidative Resi
43、stance Classification:6.8.1 The Oxidative Resistance Classification is a classification of a PE compounds resistance to the oxidative effects ofchlorinated potable water. The classification is only for PE compounds intended for potable water pressure piping applications asnoted in the materials requ
44、irement section of the appropriate ASTM standard specification. In addition to the class specified in3.3.2.2, the user shall specify an oxidative resistance requirement by appending the category designation requirement (Table 2) tothe line call out.FIG. 2 Typical DSC PlotsD3350 1456.8.2 The oxidativ
45、e resistance time used to classify the PE compound shall be determined in accordance with 10.1.11 and beclassified in accordance with Table 2.7. Sampling7.1 A batch or lot shall be considered as a unit of manufacture and shall consist of one production run or as a blend of two ormore production runs
46、 of material.7.2 Unless otherwise agreed upon between the manufacturer and the purchaser, the material shall be sampled in accordance withthe procedure described in Sections 9 through 12 of Practice D1898. Adequate statistical sampling prior to packaging shall beconsidered an acceptable alternative.
47、NOTE 8A sample taken from finished product may not necessarily represent the original batch or lot.8. Number of Tests8.1 The requirements identified by the material designation and otherwise specified in the purchase order shall be verified bytests made in accordance with 11.1. For routine inspectio
48、n, only those tests necessary to identify the material to the satisfactionof the purchaser shall be required. One sample shall be sufficient for testing each batch or lot provided that the average values forall of the tests made on that batch or lot comply with the specified requirements.9. Specimen
49、 Preparation9.1 Unless otherwise specified in Section 10, the test specimens shall be molded in accordance with Procedure C of Annex A1of Practice D4703.9.2 When pipe or fitting test specimens are required, they shall be extruded or molded in accordance with the specifications ofthe material manufacturer.10. Test Methods10.1 The properties enumerated in this specification shall be determined in accordance with the following test methods:10.1.1 ConditioningUnless otherwise specified in the test methods or in this specification, for those tests whe
