1、Designation:C161607(Reapproved 2012)Standard Test Method forDetermining the Moisture Content of Organic and InorganicInsulation Materials by Weight1This standard is issued under the fixed designation C1616;the number immediately following the designation indicates the year oforiginal adoption or,in
2、the case of 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.1.Scope1.1 This test method will determine the moisture content,asa percentage of the dry weight of o
3、rganic and inorganicinsulation materials.1.2 The values stated in inch-pound units are 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
4、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:2C168 Terminology Relating to Thermal InsulationC302 Test Method for Density and Dimensions of Pre-forme
5、d Pipe-Covering-Type Thermal InsulationC303 Test Method for Dimensions and Density of Pre-formed Block and BoardType Thermal InsulationC390 Practice for Sampling and Acceptance of ThermalInsulation Lots3.Terminology3.1 DefinitionsFor definitions used in this specification,see Terminology C168.3.2 Sy
6、mbols:M=moisture content weight,percentWI=initial specimen weight,lb(g)WMF=moisture-free specimen weight(g)M,lb4.Summary of Test Method4.1 This test method is based upon weighing specimens ofthe insulation material and then drying the specimens byheating them in an oven to remove any moisture.Then t
7、hemoisture content is determined using the calculation procedurein 9.1.5.Significance and Use5.1 Some insulation materials contain moisture,which willaffect the thermal and other physical properties of the insula-tion.6.Apparatus6.1 Air-circulating Oven.6.2 Scale(accurate to within 0.0011 lb(0.5 g).
8、7.Sampling and Test Specimen Preparation7.1 Test SpecimenThe test specimen shall be of a size thatcan be conveniently tested in a drying oven but not less than 72cubic inches in volume such as 6 by 6 by 2 in.thick(150 by150 by 51 mm).8.Procedure8.1 Four test specimens shall be tested.Cut or prepare
9、thefour specimens to meet the size requirements of 7.1.8.2 Measure and record the specimens weight(WI)imme-diately after the specimens are prepared to size.The specimensshall be weighed to the nearest 0.0011 lb(0.5 g).8.3 Place the specimens in an air-circulating oven at atemperature specified in th
10、e material specification or at atemperature no higher than 230 6 10F(110 6 6C)for aminimum of 2 h.Cool the specimens to room temperature in adesiccator and measure their weight.Repeat the process untilsuccessive weights agree to within 0.2%of the specimenweight obtained in the latest weighing.Record
11、 these weights asmoisture free weight(WMF).NOTE1When testing an insulation that contains multiple ingredientsand one or more ingredients will dehydrate between the material specifi-cation upper temperature limit or above,the oven temperature can belowered.The oven temperature will be adjusted based
12、on the chemical thedehydrates at the lowest temperature.1This test method is under the jurisdiction ofASTM Committee C16 on ThermalInsulation and is the direct responsibility of Subcommittee C16.33 on InsulationFinishes and Moisture.Current edition approved Sept.1,2012.Published November 2012.Origin
13、allyapproved in 2005.Last previous edition approved in 2007 as C161607.DOI:10.1520/C1616-07R12.2For 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 Sum
14、mary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 9.Calculation9.1 Calculate the moisture content as follows:M 5 100FWI2 WMF!WMFG(1)9.2 The value reported shall be the numerical average of thecalculated moisture
15、 content of the four specimens rounded tothe nearest 0.1 percent.10.Report10.1 Report the following information:10.1.1 Complete sample identification including tradename,manufacturer,lot number and date of production,whenknown,10.1.2 Date and time of test initiation,10.1.3 Date and time of all weigh
16、t determinations alongwith the weights,10.1.4 Actual temperature used to dry the sample,10.1.5 Time to reach steady dry weight,and10.1.6 Report the results of all the specimens tested for eachsample and the numerical average calculated in 9.2.11.Precision and Bias11.1 Precision and bias have not yet been determined but arebeing investigated.A precision and bias statement will beincluded when the proper data have been obtained and ana-lyzed.12.Keywords12.1 inorganic insulation;insulation;moisture