1、Designation: C302 13 (Reapproved 2017)Standard Test Method forDensity and Dimensions of Preformed Pipe-Covering-TypeThermal Insulation1This standard is issued under the fixed designation C302; the number immediately following the designation indicates the year oforiginal adoption or, in the case of
2、revision, the year 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 U.S. Department of Defense.1. Scope1.1 This test
3、method covers the determination of the dimen-sions and density, after conditioning, of preformed pipe insu-lation.1.1.1 ProcedureAis applicable to sections of one-piece pipecovering or to sections of segmental pipe covering that can bejoined together concentrically and measured as one-piece.1.1.2 Pr
4、ocedure B is applicable to segmental pipe coveringwhere each section of material is measured.1.1.3 Procedure C is applicable to sections of one-piece pipecovering, such as soft foam or mineral wool materials, whereit is possible to penetrate the material.1.2 The values stated in inch-pound units are
5、 to be regardedas the standard. The values given in parentheses are forinformation only.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, health, and environ
6、mental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards
7、, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2C167 Test Methods for Thickness and Density of Blanket orBatt Thermal InsulationsC168 Terminology Relating to Thermal InsulationC670 Practice for
8、 Preparing Precision and Bias Statementsfor Test Methods for Construction MaterialsC870 Practice for Conditioning of Thermal Insulating Ma-terialsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method3. Terminology3.1 DefinitionsSee Terminology C168.4. Summa
9、ry of Test Method4.1 The material to be tested is conditioned to constantweight. The density of the pipe insulation is calculated from theconditioned mass and measured dimensions.5. Significance and Use5.1 Density measurements of preformed pipe insulation areuseful in determining compliance of a pro
10、duct 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 conductivity, heatcapacity, strength, etc., bear a specific relationship with itsdensity; however, on a density basis,
11、these properties are notdirectly comparable with those for other kinds of material.5.2 The physical dimensions of preformed pipe insulationare important quantities not only for determining the density ofthe pipe insulation but also for determining the conformance tospecifications. The use of multila
12、yer insulations is common,and the dimensions are necessary to ensure proper nesting ofthe layers.6. Apparatus6.1 Flexible Steel Rule, graduated in132-in. or 1.0-mmintervals.6.2 Scale, with sufficient capacity to weigh the specimen towithin 0.01 lb or 5 g.6.3 Pin Probe, as defined in Test Methods C16
13、7.6.4 Steel Rule, graduated in132-in. or 1.0-mm intervals.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 Sept. 1, 2017. Published December 2017. Originallya
14、pproved in 1952. Last previous edition approved in 2013 as C302 13. DOI:10.1520/C0302-13R17.2For 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 standards Document S
15、ummary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Princip
16、les for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.16.5 Stainless Steel Shim Stock, 2 in. (75 mm) wide, longerthan the circumference of the pipe insulation, and 0.010 in.(0.25 mm) thick.6.6
17、Pi Tape, graduated to read a diameter directly to thenearest132 in. or 1.0 mm.6.7 Pieces of Pipe, on which to install the pipe insulationunder test (only required for Procedure 3).7. Test Specimen7.1 The test specimen shall be of a commercial size.7.2 If sectional pipe segments are to be used for Pr
18、ocedures1 or 3, the sections shall be joined together to form a hollowcylinder.8. Conditioning8.1 Remove any jacket on the specimen unless it is of a typethat would cause disintegration of the specimen upon removal.8.2 Condition the specimen to constant mass in accordancewith Practice C870.9. Proced
19、uresProcedure A9.1 One-Piece Pipe Section:9.1.1 Weigh the conditioned pipe section to the nearest 0.01lb or 5 g.9.1.2 Measure the length of the specimen in six locations,uniformly spaced around its circumference, to the nearest132in. or 1.0 mm.9.1.3 Measure the circumference of the specimen in sixlo
20、cations, uniformly spaced along its length, to the nearest132in. or 1.0 mm.9.1.4 Measure the wall thickness at six locations, uniformlyspaced, three on each end of the specimen, to the nearest132 in.or 1.0 mm.Procedure B9.2 Segmental Pipe Sections:9.2.1 Weigh the conditioned segmental pipe section t
21、o thenearest 0.01 lb or 5 g.9.2.2 Measure the length of the arc formed by the outersurface of the specimen at six locations, uniformly spacedalong its length, to the nearest132 in. or 1.0 mm.9.2.3 Measure the length of the arc formed by the innersurface of the specimen at six locations, uniformly sp
22、acedalong its length, to the nearest132 in. or 1.0 mm.9.2.4 Measure the length of the specimen in six locations,uniformly spaced around the outer surface, to the nearest132 in.or 1.0 mm.9.2.5 Measure the wall thickness at six locations, uniformlyspaced, one on each end and two on each side of the sp
23、ecimen,to the nearest132 in. or 1.0 mm.Procedure C9.3 Non-Rigid Pipe Insulations:9.3.1 Weigh the conditioned pipe section to the nearest 0.01lb or 5 g.9.3.2 Place the insulation on a pipe of the same outsidediameter as the nominal inside diameter of the specimen, andtie in place. Support the ends of
24、 the pipe such that the specimenis not resting on a surface.9.3.3 Measure the length of the specimen in six locations,uniformly spaced around its circumference, to the nearest132in. or 1.0 mm.9.3.4 Measure the diameter of the specimen in six locations,uniformly spaced along its length, to the neares
25、t132 in. or 1.0mm, using the Pi tape. In order to avoid compressing theinsulation specimens under the Pi tape, wrap the shim stockaround the specimen and use the Pi tape over the shim stock.Subtract twice the thickness of the shim stock from thediameter measured and convert the diameter to a circumf
26、erenceby multiplying the average diameter by .9.3.5 Measure the wall thickness at six locations, uniformlyspaced along the length of the specimen and uniformly spacedaround its surface, using the pin probe of 6.3, to the nearest132in. or 1.0 mm.10. Calculations10.1 Calculate the volume of the specim
27、en using one of thefollowing equations:10.1.1 Procedures A and C:V 5 LtC 2 t!/1728 (1)where:V = volume of the specimen, ft3,L = average length of the specimen, in.,C302 13 (2017)2t = average thickness of the specimen, in., andC = average circumference of the specimen, in.orV 5 LtC 2 t! 31029(2)where
28、:V = isinm3, and L, t, and C are in mm.NOTE 1If the jacket is not removed before measuring the outercircumference, deduct twice the jacket thickness times from themeasured circumference.10.1.2 Procedure B:V 5 LtAo1Ai!/3456 (3)where:V = volume of the specimen, ft3,L = average length of the specimen,
29、in.,t = average thickness of the specimen, in.,Ao= average outer arc length of the specimen, in., andAi= average inner arc length of the specimen, in.orV 512Lt Ao1Ai! X 1029(4)where:V = isinm3and,L, T, Ao, and AI= are in mm.10.2 Calculate the density of the specimen from the condi-tioned mass and th
30、e calculated volume as follows, and expressthe results in pounds per cubic foot or kilograms per cubicmetre.Density, lbft35mass lb!Vft3!(5)orDensity, kgm35massg!1000Vm3!(6)NOTE 2If the jacket was not removed before weighing and measuring,deduct the mass of the jacket from the specimen mass. If the s
31、pecimen willbe used for additional testing, a jacket from a specimen from the samesample will have to be sacrificed to measure the mass per lineal foot of thejacket.11. Report11.1 Report the following information:11.1.1 The average dimensions of the pipe insulation,11.1.2 The density of the specimen
32、 in pounds per cubic footor kilograms per cubic metre,11.1.3 The average thickness to the nearest132 in. or 1.0mm. State whether or not the jacket was removed,11.1.4 Individual dimensions and mass measurements onlywhen specified, and11.1.5 Preconditioning and conditioning temperatures andrelative hu
33、midities used in Section 8, unless they are specifiedin a separate standard.12. Precision and Bias12.1 Precision (Procedure A)The multi-laboratory 95 %repeatability limit for three materials was found to be 6.16 %,and the 95 % reproducibility limit was found to be 9.13 %when the round robin results
34、were analyzed using PracticeE691.12.2 Precision (Procedure B)Both the multi-laboratoryand single-operator coefficients of variation were found to be1.3 % (Note 3). Therefore, the results on identical samples bytwo different laboratories or the results of two tests on identicalmaterial by the same op
35、erator should not differ by more than3.7 % on their average.NOTE 3(For Procedure 2 only), the percentage variation represents,respectively, the (1) and (D2) limits.12.3 Precision (Procedure C)The multi-laboratory 95 %repeatability limit for three materials was found to be 6.10 %and the 95 % reproduc
36、ibility limit was found to be 7.67 %when the round robin results were analyzed using PracticeE691.12.4 BiasThe procedures in this test method for measur-ing the dimensions and the density of preformed pipe covering-type thermal insulation have no bias because no materialhaving an accepted reference
37、value is available.13. Keywords13.1 pipe insulation density; pipe insulation dimensions;thermal insulationASTM 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 tha
38、t determination 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 reappro
39、ved or withdrawn. 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 fe
40、el that your comments 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 rep
41、rints (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). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 13 (2017)3
