1、Designation: C578 16C578 17Standard Specification forRigid, Cellular Polystyrene Thermal Insulation1This standard is issued under the fixed designation C578; 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.This standard has been approved for use by agencies of the U.S. Department of Defense.1. Scope1.1 This specification2 covers the types, physica
3、l properties, and dimensions of cellular polystyrene boards with or withoutfacings or coatings made by molding (EPS) or extrusion (XPS) of expandable polystyrene. Products manufactured to thisspecification are intended for use as thermal insulation for temperatures from -65 to +165F (-53.9 to +73.9C
4、). This specificationdoes not apply to laminated products manufactured with any type of rigid board facer including fiberboard, perlite board, gypsumboard, or oriented strand board.1.1.1 For Type XIII only, this specification covers the physical properties, and dimensions of cellular polystyrene int
5、ended foruse as thermal insulation for temperatures from 297 to +165F (183 to +73.9C).1.2 Consult the manufacturer for specific recommendations and properties in cryogenic conditions.1.2.1 This specification does not cover cryogenic properties except for the k-factors for Type XIII in Appendix X1. F
6、or TypeXIII in specific cryogenic applications, the manufacturer and purchaser shall agree upon the actual temperature limits and physicalproperty requirements in addition to the k-factors in Appendix X1.1.3 The use of thermal insulation materials covered by this specification may be regulated by bu
7、ilding codes that address fireperformance. For some end uses, specifiers should also address the effect of moisture and wind pressure resistance. Guidelinesregarding these end use considerations are included in Appendix X1.1.4 The values stated in inch-pound units are to be regarded as standard. The
8、 values given in parentheses are mathematicalconversions to SI units that are provided for information only and are not considered standard.1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard
9、to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use.1.6 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Develo
10、pment of International Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:3C165 Test Method for Measuring Compressive Properties of Thermal InsulationsC168 Terminology Relating to Thermal I
11、nsulationC177 Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of theGuarded-Hot-Plate ApparatusC203 Test Methods for Breaking Load and Flexural Properties of Block-Type Thermal InsulationC272 Test Method for Water Absorption of Core Materials for Stru
12、ctural Sandwich ConstructionsC303 Test Method for Dimensions and Density of Preformed Block and BoardType Thermal Insulation1 This specification is under the jurisdiction of ASTM Committee C16 on Thermal Insulation and is the direct responsibility of Subcommittee C16.22 on Organic andNonhomogeneous
13、Inorganic Thermal Insulations.Current edition approved Nov. 15, 2016June 1, 2017. Published November 2016June 2017. Originally approved in 1965. Last previous edition approved in 20152016 asC578 15b.C578 16. DOI: 10.1520/C0578-16.10.1520/C0578-17.2 This specification is similar to ISO 4898-1984, “Ce
14、llular PlasticsSpecification for Rigid Cellular Materials Used in the Thermal Insulation of Buildings,” in title only.The scope and technical content are significantly different.ISO standards are available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 100
15、36, http:/www.ansi.org.3 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. ForAnnual Book ofASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard an
16、d 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 all cases only
17、the current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1C335 Test Method for Steady-State Heat Transfer Properties of Pipe InsulationC390 Practi
18、ce for Sampling and Acceptance of Thermal Insulation LotsC518 Test Method for Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter ApparatusC550 Test Method for Measuring Trueness and Squareness of Rigid Block and Board Thermal InsulationC870 Practice for Conditioning of Ther
19、mal Insulating MaterialsC1045 Practice for Calculating Thermal Transmission Properties Under Steady-State ConditionsC1058 Practice for Selecting Temperatures for Evaluating and Reporting Thermal Properties of Thermal InsulationC1114 Test Method for Steady-State Thermal Transmission Properties by Mea
20、ns of the Thin-Heater ApparatusC1303 Test Method for Predicting Long-Term Thermal Resistance of Closed-Cell Foam InsulationC1363 Test Method for Thermal Performance of Building Materials and EnvelopeAssemblies by Means of a Hot BoxApparatusC1512 Test Method for Characterizing the Effect of Exposure
21、to Environmental Cycling on Thermal Performance of InsulationProductsD1600 Terminology for Abbreviated Terms Relating to PlasticsD1621 Test Method for Compressive Properties of Rigid Cellular PlasticsD1622 Test Method for Apparent Density of Rigid Cellular PlasticsD2126 Test Method for Response of R
22、igid Cellular Plastics to Thermal and Humid AgingD2863 Test Method for Measuring the Minimum Oxygen Concentration to Support Candle-Like Combustion of Plastics(Oxygen Index)E84 Test Method for Surface Burning Characteristics of Building MaterialsE96/E96M Test Methods for Water Vapor Transmission of
23、MaterialsE176 Terminology of Fire Standards2.2 CAN/ULC Standard4CAN/ULC S770 Standard Test Method for the Determination of Long-Term Thermal Resistance of Closed-Cell ThermalInsulating Foams3. Terminology3.1 Definitions:3.1.1 Terms used in this specification are defined in Terminology C168.3.1.2 Ter
24、ms used in this specification that relate to fire standards are defined in Terminology E176.3.2 Definitions of Terms Specific to This Standard:3.2.1 EPSletter designation for the molded expanded polystyrene thermal insulation classified by this specification. It isdefined as cellular plastic product
25、 manufactured from pre-expanded polystyrene beads subsequently molded into desired shapesand sizes resulting in a product which is rigid with closed cellular structure.3.2.2 RCPSletter designations for the rigid cellular polystyrene thermal insulation classified by this specification that identifies
26、the product as rigid cellular polystyrene.3.2.3 PSused in this specification to represent polystyrene in accordance with Terminology D1600.3.2.4 XPSletter designation for the extruded expanded polystyrene thermal insulation classified by this specification. It isdefined as cellular plastic product m
27、anufactured in a one stage process by extrusion and expansion of the base polymer in thepresence of blowing agent(s) resulting in a product which is rigid with closed cellular structure.4. Classification4.1 This specification covers types of RCPS thermal insulations currently commercially available
28、as described by the physicalproperty requirements in Table 1.5. Ordering Information5.1 Acquisition documents shall specify the following:5.1.1 Title, number, and year of this specification,5.1.2 Type (see Table 1),5.1.3 R-value or thickness required (see Tables 1 and 2),5.1.3.1 Thermal Resistance/T
29、hickness RelationshipThe thermal resistance (R-value) and the thermal resistivity (R-value/inch)of RCPS thermal insulation may vary with thickness. Therefore, when ordering, specify the R-value or the thickness, or both. Foradditional information, see Practice C1045.5.1.4 Density, if other than spec
30、ified in Table 1,5.1.5 Tolerance, if other than specified (see 8.2),5.1.6 Length and width required (see Table 2 and 8.1),4 Available from Underwriters Laboratories (UL), 2600 N.W. Lake Rd., Camas, WA 98607-8542, http:/.C578 1725.1.7 If other than straight edges are required (see 8.3),5.1.8 If eithe
31、r ship-lap or tongue-and-groove edges are required (see 8.6),5.1.9 Tapered InsulationspecialSpecial ordering information. In addition to other applicable requirements in Section 5 (Note1), acquisition documents for tapered RCPS thermal insulation shall specify the following:5.1.9.1 Minimum starting
32、thickness,5.1.9.2 Slope, in./ft (mm/m),5.1.9.3 Average R-value,5.1.9.4 Minimum thickness,5.1.9.5 Shop DrawingsThe tapered insulation supplier shall provide shop drawings to illustrate installation patterns anddimensions for each tapered module,5.1.10 Sampling, if different (see 10.1),5.1.11 If a cer
33、tificate of compliance is required (see 14.1), andTABLE 1 Physical Property Requirements of RCPS Thermal InsulationNOTE 1The values for properties listed in this table may be affected by the presence of a surface skin which is a result of the manufacturing process.The values for Type XIII properties
34、 listed in this table must be generated on material with the surface skin removed. Where products are tested withskins-in-place, this condition shall be noted in the test report.NOTE 2Type III has been deleted because it is no longer available.NOTE 3In addition to the thermal resistance values in Ta
35、ble 1, values at mean temperatures of 25 2F (-4 1C), 40 2F (4 1C), and 110 2F (43 1C) are provided in X1.8 for information purposes.NOTE 4For Type XIII, in addition to the Thermal resistance property requirements shown in Table 1, there are Apparent Thermal Conductivityproperty values shown for info
36、rmational purposes in Table X1.2 of Appendix X1.NOTE 5Values quoted are maximum values for 1.00 in. (25.4 mm) thick samples with natural skins intact. Lower values will result for thickermaterials. Where water vapor permeance is a design issue, consult manufacturer.NOTE 6The values for thermal resis
37、tance listed in this table may be determined on product at a thickness other than 1 in. (25.4 mm) in accordancewith 7.2.2.1. When tested at a thickness other than 1 in. (25.4 mm), the thermal resistance per inch shall meet the minimum requirement.NOTE 7Types XI, I, VIII, II, IX, XIV and XV are typic
38、ally EPS insulation. Types XII, X, XIII, IV, VI, VII and V are typically XPS insulation.Classification TypeXITypeITypeVIIITypeIITypeIXTypeXIVTypeXVTypeXIITypeXTypeXIIITypeIVTypeVITypeVIITypeVCompressive resistance atyield or 10 % deformation,whichever occurs first(with skins intact), min, psi(kPa)5.
39、0(35)10.0(69)13.0(90)15.0(104)25.0(173)40.0(276)60.0(414)15.0(104)15.0(104)20.0(138)25.0(173)40.0(276)60.0(414)100.0(690)Thermal resistance of 1.00-in.(25.4-mm) thickness, min,Fft2h/Btu (Km2/W)3.1(0.55)3.6(0.63)3.8(0.67)4.0(0.70)4.2(0.74)4.2(0.74)4.3(0.76)4.6(0.81)5.0(0.88)3.9(0.68)5.0(0.88)5.0(0.88
40、)5.0(0.88)5.0(0.88)Mean temperature:75 2F (24 1C)Flexural strength, min, psi (kPa) 10(70)25(173)30(208)35(240)50(345)60(414)75(517)40(276)40(276)45(310)50(345)60(414)75(517)100(690)Water vapor permeance of1.00-in. (25.4-mm) thickness(See Note 5.), max, perm(ng/Pasm2)5.0(287)5.0(287)3.5(201)3.5(201)2
41、.5(143)2.5(143)2.5(143)1.5(86)1.5(86)1.5(86)1.5(86)1.1(63)1.1(63)1.1(63)Water absorption by totalimmersion, max, volume %4.0 4.0 3.0 3.0 2.0 2.0 2.0 0.3 0.3 1.0 0.3 0.3 0.3 0.3Dimensional stability (changein dimensions), max,%2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0Oxygen index, min,
42、volume % 24.0 24.0 24.0 24.0 24.0 24.0 24.0 24.0 24.0 24.0 24.0 24.0 24.0 24.0Density, min, lb/ft3 (kg/m3) 0.70(12)0.90(15)1.15(18)1.35(22)1.80(29)2.40(38)3.00(48)1.20(19)1.30(21)1.60(26)1.45(23)1.80(29)2.20(35)3.00(48)TABLE 2 Common Dimensions of RCPS Thermal InsulationType XI, I, VIII, II, IX, XIV
43、, XV X, IV, XII VI, VII V XIIIWidth, in. (mm) 12 to 48 (305 to 1219) 16, 24, 48 (406, 610, 1219) 24 (610) 16 (406) 14 to 20 (356 to508)Length, in. (mm) 48 to 192 (1219 to 4877) 48, 96 108 (1219, 2438, 2743) 48, 96, (1219, 2438) 96 (2438) 36 to 112 (914 to2845)Thickness, in. (mm) 38 to 24 (9.5 to 610
44、) 12 to 4 (13 to 102) 1 to 4 (25 to 102) 1 to 4 (25 to 102) 7 to 10 (178 to254)C578 1735.1.12 If marking is other than specified (see 15.1).NOTE 1Physical properties of tapered insulation should be determined on blocks of RCPS thermal insulation before the insulation is tapered.5.1.13 Type XIIISpeci
45、al ordering information. In addition to other applicable requirements in Section 5, acquisitiondocuments for Type XIII thermal insulation shall specify if presence of surface skins is required.6. Materials and Manufacture6.1 RCPS thermal insulation shall be formed by the expansion of polystyrene res
46、in beads or granules in a closed mold, or bythe expansion of polystyrene base resin in an extrusion process. RCPS thermal insulation shall be of uniform density and haveessentially closed cells. All RCPS thermal insulation shall contain sufficient flame retardants to meet the oxygen indexrequirement
47、s of Table 1.7. Physical Requirements7.1 Inspection Requirements:7.1.1 The physical requirements listed in this section are defined as inspection requirements (refer to Practice C390).7.1.2 All dimensional requirements are described in Section 8.7.1.3 All workmanship, finish, and appearance requirem
48、ents are described in Section 9.7.1.4 Density shall be in accordance with Table 1.NOTE 2For lots of 150 units or less, the tightened inspection sampling plan in Practice C390 will be followed.7.2 Qualification Requirements:7.2.1 The physical properties listed in this section of the specification are
49、 defined as qualification requirements (refer to PracticeC390). Thermal resistance, compressive resistance, flexural strength, water vapor permeance, water absorption, dimensionalstability, and oxygen index shall be in accordance with Table 1. The average test value based upon testing the number of testspecimens required by the specified test method for each physical property or Section 11 of this specification shall be used todetermine compliance.7.2.2 The mean thermal resistance of the material tested shall n
