1、Designation: C 303 07Standard Test Method forDimensions and Density of Preformed Block andBoardType Thermal Insulation1This standard is issued under the fixed designation C 303; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the y
2、ear of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) 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 deter
3、mination of the dimensionsand density of block and board insulation as defined inTerminology C 168.1.2 The values stated in the SI system are to be regarded asthe standard.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibilit
4、y 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. Referenced Documents2.1 ASTM Standards:2C 167 Test Methods for Thickness and Density of Blanketor Batt Thermal InsulationsC 168 Terminology
5、Relating to Thermal InsulationC 390 Practice for Sampling and Acceptance of ThermalInsulation LotsC 870 Practice for Conditioning of Thermal Insulating Ma-terials3. Terminology3.1 GeneralTerminology C 168 shall be considered asapplicable to the terms used in this test method.4. Summary of Test Metho
6、d4.1 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 as given in thematerial specification. If the material is to be tested in the “dry”condition it shall be dried to constant mass. If th
7、e materialspecification does not give conditioning instructions, a condi-tioning environment of 23C 6 2C and 50 6 5 % relativehumidity per Practice C 870 shall be used. From the measuredmass and measured dimensions, the density of the product iscalculated.NOTE 1Some materials may contain volatiles s
8、uch as moisture whenmanufactured or shipped, or both.5. Significance and Use5.1 Dimensional measurements of the product thermal in-sulation are essential in determining compliance of a productwith specification limits. Dimensional measurements of vari-ous test specimens are also required by the spec
9、ific testmethod.5.2 Density measurements of the product insulation areuseful in determining compliance of a product with specifica-tion limits, and in providing a relative gage of product weights.For any one kind of insulation, some important physical andmechanical properties, such as thermal conduc
10、tivity, heatcapacity, strength, etc., bear a specific relationship with itsdensity. In order to design for equipment supports, check thematerial for the “as received density” where the moisturecontent of the product as received and then installed mayconsequential.6. Apparatus6.1 Steel measure, (rule
11、r 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 micrometergraduated in millimetres or better, with a minimum platediameter of 6 mm, and a maximum plate of 25 by 25 mm. Thisinstrument shall be suita
12、ble for measuring the dimensions to61.0 %. This instrument shall not cause deformation of theproduct when measuring it. The pressure exerted by thismeasuring plate should not exceed 0.245 kN/mm2.6.3 Pin probe depth gage per Test Methods C 167.6.4 Scales, accurate to within5gorwithin 1 % of thespecim
13、en mass (whichever is less). If the material specificationcalls for a greater accuracy, this shall take precedence. If the1This test method is under the jurisdiction ofASTM Committee C16 on ThermalInsulation and is the direct responsibility of Subcommittee C16.32 on MechanicalProperties.Current edit
14、ion approved May 1, 2007. Published May 2007. Originallypublished as approved in 1952. Last previous edition approved in 2002 asC 303 02.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume i
15、nformation, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.samples are to be conditioned per Practice C 870 the accuracyshall be within 0.1 %.6.5 Drying Oven.NOTE 2Gene
16、rally a rule or instrument is used for dimensions lessthan a metre and a tape used for longer dimensions.7. Test Specimen7.1 The test specimens shall be of commercial size when-ever practicable, but shall not be less than 100 mm wide by 200mm long, except if required by a specific test method. Thesa
17、mple size shall be determined in accordance with thematerial specification. If not specified there, then in accordancewith Practice C 390 test at least five specimens.7.2 When less than full commercial size pieces are testedends and sides shall be trimmed by cutting or fabricating togive a block wit
18、h parallel sides and ends with only top andbottom surfaces original.8. Conditioning8.1 If the specimens are to be conditioned, condition thespecimens to constant mass in accordance with Practice C 870.Consult the materials specification for any specific condition-ing requirements.8.2 If the specimen
19、s are not to be conditioned, test as soonas possible.9. Procedure9.1 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 b
20、eapplied.9.2 If the pin probe depth gage is used the measurementsshall be per 8.2 of Test Methods C 167.9.3 The thickness shall be measured along the edges in atleast four different locations, generally near the four cornersapproximately 25-75 mm from the corner, as shown in Fig. 1for locations A,B,
21、C, and D. The length and width shall bemeasured in at least two locations. At approximately along theA-B and C-D lines for the width and the A-D and B-C lines forthe length. For specimens larger than 1 m2in area, there shallbe an additional two thickness measurements for each addi-tional square mete
22、r in size. These would be in the centralsection of the specimen as shown by locations E and F. Thereshall also be an additional length or width measurement foreach additional meter increase in length or width over 1 mlong. These measurement positions shall be spaced approxi-mately equally within the
23、 original measurement area definedby A,B,C,D.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, m35 length, mm 3 width, mm 3 thickness, mm 3 1029(1)10.2 Calculate the density of the specimen from th
24、e 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 Report the dimensions. R
25、eport 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 and Bias312.1 Precision
26、 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 (2.8SR) = 3.3%12.3 Bias-
27、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 have been filed at AST
28、M Headquarters. Request ResearchReport RR: C161025.C303072FIG. 1 Specimen MeasurementC303073ASTM 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 determinatio
29、n of the validity 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 withdra
30、wn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your c
31、omments have 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 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).C303074
