1、Designation: C303 10Standard Test Method forDimensions and Density of Preformed Block andBoardType Thermal Insulation1This standard is issued under the fixed designation C303; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the yea
2、r 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 Department of Defense.1. Scope1.1 This test method covers determin
3、ation of the dimensionsand density of block and board insulation as defined inTerminology C168.1.2 The 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
4、 standard.1.3 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-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Re
5、ferenced Documents2.1 ASTM Standards:2C167 Test Methods for Thickness and Density of Blanket orBatt Thermal InsulationsC168 Terminology Relating to Thermal InsulationC390 Practice for Sampling and Acceptance of ThermalInsulation LotsC870 Practice for Conditioning of Thermal Insulating Ma-terials3. T
6、erminology3.1 GeneralTerminology C168 shall be considered asapplicable to the terms used in this test method.4. Summary of Test Method4.1 The material shall be tested in the “dry” condition or inthe “as manufactured and received” condition (see Note 1) butthe procedure must be consistent with that a
7、s given in thematerial specification. If the material is to be tested in the “dry”condition it shall be dried to constant mass. If the materialspecification does not give conditioning instructions, a condi-tioning environment of 73F 6 4F (23C 6 2C) and 50 65 % relative humidity per Practice C870 sha
8、ll be used. Fromthe measured mass and measured dimensions, the density ofthe product is calculated.NOTE 1Some materials may contain volatiles such as moisture whenmanufactured or shipped, or both.5. Significance and Use5.1 Dimensional measurements of the product thermal in-sulation are essential in
9、determining compliance of a productwith specification limits. Dimensional measurements of vari-ous test specimens are also required by the specific testmethod.5.2 Density measurements of the product insulation areuseful in determining compliance of a product with specifica-tion limits, and in provid
10、ing a relative gage of product weights.For any one kind of insulation, some important physical andmechanical properties, such as thermal conductivity, heatcapacity, strength, etc., bear a specific relationship with itsdensity. In order to design for equipment supports, check thematerial for the “as
11、received density” where the moisturecontent of the product as received and then installed mayconsequential.6. Apparatus6.1 Steel measure, (ruler or tape), graduated in millimetresor better, suitable for measuring dimensions to 6 1.0 % (seeNote 2).6.2 Instrument, such as caliper, dial gage, or microm
12、etergraduated in millimetres or better, with a minimum platediameter of 6 mm, and a maximum plate of 1.0 by 1.0 in. (25by 25 mm). This instrument shall be suitable for measuring thedimensions to 61.0 %. This instrument shall not cause defor-mation of the product when measuring it. The pressure exert
13、edby this measuring plate should not exceed 0.040 psi or 5psf(0.245 kPa).1This test method is under the jurisdiction ofASTM Committee C16 on ThermalInsulation and is the direct responsibility of Subcommittee C16.32 on MechanicalProperties.Current edition approved June 1, 2010. Published July 2010. O
14、riginallypublished as approved in 1952. Last previous edition approved in 2007 asC303 07. DOI: 10.1520/C0303-10.2For 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
15、standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6.3 Pin probe depth gage per Test Methods C167.6.4 Scales, accurate to within 0.0lb (5g) or within 1 % of thespecimen mass (whichever
16、is less). If the material specificationcalls for a greater accuracy, this shall take precedence. If thesamples are to be conditioned per Practice C870 the accuracyshall be within 0.1 %.6.5 Drying Oven.NOTE 2Generally a rule or instrument is used for dimensions lessthan a metre and a tape used for lo
17、nger dimensions.7. Test Specimen7.1 The test specimens shall be of commercial size when-ever practicable, but shall not be less than 4 in. wide by 8 in.long (100 mm wide by 200 mm long), except if required by aspecific test method. The sample size shall be determined inaccordance with the material s
18、pecification. If not specifiedthere, then in accordance with Practice C390 test at least fivespecimens.7.2 When less than full commercial size pieces are testedends and sides shall be trimmed by cutting or fabricating togive a block with parallel sides and ends with only top andbottom surfaces origi
19、nal.8. Conditioning8.1 If the specimens are to be conditioned, condition thespecimens to constant mass in accordance with Practice C870.Consult the materials specification for any specific condition-ing requirements.8.2 If the specimens are not to be conditioned, test as soonas possible.9. Procedure
20、9.1 After conditioning, measure the width and length of thespecimen to the nearest 1 mm unless different tolerances aregiven in the material specification, or there are differentmeasurement tolerances within a specific test method to beapplied.9.2 If the pin probe depth gage is used the measurements
21、shall be per 8.2 of Test Methods C167.9.3 The thickness shall be measured along the edges in atleast four different locations, generally near the four cornersapproximately 1-3 in. (25-75 mm) from the corner, as shown inFig. 1 for locations A,B,C, and D. The length and width shallbe measured in at le
22、ast two locations. At approximately alongthe A-B and C-D lines for the width and the A-D and B-C linesfor the length. For specimens larger than 10 ft2(1 m2) in area,there shall be an additional two thickness measurements foreach additional 10 ft2(1 m2) in size. These would be in thecentral section o
23、f the specimen as shown by locations E and F.There shall also be an additional length or width measurementfor each additional meter increase in length or width over 3 ft(1 m) long. These measurement positions shall be spacedapproximately equally within the original measurement areadefined by A,B,C,D
24、.9.4 Measure and record the mass.10. Calculation10.1 Calculate the volume of the specimen from the averagewidth, length, and thickness as follows:Volume, Cu.ft. 5 length, in. 3 width, in. 3 thickness, in./1728 (1)Volume, m35 length, mm 3 width, mm 3 thickness, mm 3 1029!10.2 Calculate the density of
25、 the specimen from the massand calculated volume as follows:Density, kg/m35mass, kgvolume, m3(2)density, lb/ft35 density, kg/m33 0.0624 (3)11. Report11.1 Report the average density of the sample in pounds percubic foot or kilograms per cubic metre. Report density to threesignificant figures.11.2 Rep
26、ort the dimensions. Report dimensions to the near-est millimetre, or as requested.11.3 Material identification including manufacturers type/grade designation and lot number or date of manufacture.11.4 Date testing was performed.11.5 Specimen conditioning used or “tested as received.”12. Precision an
27、d Bias312.1 Precision of the density test method was determined bya round robin with six participating laboratories. The producttested was mineral fiber board insulation at a density of2.98 lb/ft3(47.74 kg/m3).12.2 Precision results:95% Repeatability Limit (2.8Sr) = 1.7%95% Reproducibility Limit (2.
28、8SR) = 3.3%12.3 Bias-No information can be presented on the bias ofthe procedure in this test method because no material having anaccepted reference value is available.13. Keywords13.1 block; board; density; dimensions; thermal insulation;thermal insulating materialsblock and board3Supporting data h
29、ave been filed at ASTM Headquarters. Request ResearchReport RR:C16-1025.C303 102ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the val
30、idity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your com
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32、 not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple
33、copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).FIG. 1 Specimen MeasurementC303 103
