1、Designation: C 1374 03Standard Test Method forDetermination of Installed Thickness of PneumaticallyApplied Loose-Fill Building Insulation1This standard is issued under the fixed designation C 1374; the number immediately following the designation indicates the year oforiginal adoption or, in the cas
2、e of revision, the year 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.1. Scope1.1 This test method covers determination of the installedthickness of pneumatically applied l
3、oose-fill building insula-tions prior to settling by simulating an open attic withhorizontal blown applications.1.2 This test method is a laboratory procedure for use bymanufacturers of loose-fill insulation for product design, labeldevelopment, and quality control testing. The apparatus usedproduce
4、s installed thickness results at a given mass/unit area.1.3 This test method is not the same as the design densityprocedures described in Test Methods C 520 or SpecificationsC 739 or C 764.1.4 The values stated in inch-pound units are to be regardedas the standard. The values given in parentheses ar
5、e providedfor information only.1.5 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 limitatio
6、ns prior to use.2. Referenced Documents2.1 ASTM Standards:C 168 Terminology Relating to Thermal Insulation2C 520 Test Methods for Density of Granular Loose-FillInsulations2C 739 Specification for Cellulosic Fiber (Wood-Base)Loose-Fill Thermal Insulation2C 764 Specification for Mineral Fiber Loose-Fi
7、ll ThermalInsulation2E 691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method33. Terminology3.1 DefinitionsUnless otherwise stated, the definitionslisted in Terminology C 168 are applicable herein.3.2 Definitions of Terms Specific to This Standard:3.2.1 insta
8、lled thickness, nthe average thickness, as mea-sured immediately after application of blown insulation mate-rial when applied at a given mass/unit area.4. Summary of Test Method4.1 A standardized test chamber of 80 ft2(7.4 m2) is used asa receptacle to receive a calculated mass/unit area of pneumati
9、-cally applied insulation.4.2 The mass of insulation to be blown into the test chamberis calculated from the bag label information.4.3 The mass of insulation prescribed in 4.2 is uniformlyblown into the test chamber.4.4 The thickness of the blown insulation is determined at13 predetermined locations
10、.4.5 The thickness average of three tests is the installedthickness for the mass/unit area being tested.5. Significance and Use5.1 This test method was designed to give the manufacturerof loose-fill insulation products a way of determining what theinitial installed thickness should be in a horizonta
11、l open atticfor pneumatic applications.5.2 The installed thickness value developed by this testmethod is intended to provide guidance to the installer in orderto achieve a minimum mass/unit area for a given R-value.5.3 For the purpose of product design, testing should bedone at a variety of R-values
12、. At least three R-values should beused: the lowest R-value on the product label, the highestR-value on the product label, and an R-value near the midpointof the R-value range.NOTE 1For quality control purposes, testing may be done at oneR-value of R-19 (h3ft23F/Btu) or higher.5.4 Specimens are blow
13、n in a manner consistent with theintended installation procedure. Blowing machine settingsshould be representative of those typically used for fieldapplication with that machine.5.5 The material blown for a given R-value as part of theinstalled thickness test equals the installed mass/unit area time
14、sthe test chamber area. This mass can be calculated frominformation provided on the package label at the R-valueprescribed.1This test method is under the jurisdiction ofASTM Committee C16 on ThermalInsulation and is the direct responsibility of Subcommittee C16.32 on MechanicalProperties.Current edi
15、tion approved April 10, 2003. Published May 2003.Originallyapproved in 1997. Last previous edition approved in 1997 as C137497.2Annual Book of ASTM Standards, Vol 04.06.3Annual Book of ASTM Standards, Vol 14.02.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA
16、19428-2959, United States.6. Apparatus6.1 Blowing MachineA pneumatic blowing machine, de-signed primarily for handling loose-fill insulation materials,shall be used for blowing the insulation into the test chamber.This machine shall have throughput and material handlingcharacteristics similar to tha
17、t used in field applications.6.2 Blowing HoseThe machine should utilize 150 ft (46m) of 3in. (76mm) diameter flexible, corrugated blowinghose. At least 100 ft (30 m) of the hose should be elevatedbetween 10 and 20 ft (3 and 6 m) above the blowing machineto simulate a typical installation configurati
18、on. The hose shouldhave no more than eight 90 bends and no bends may be lessthan 4ft (1.2m) radius.NOTE 2It is good practice to clean the hose periodically by mechani-cally agitating it with the blower on. This practice should dislodge anypieces of insulation that might be caught in the hose.6.3 Tes
19、t Specimen ChamberThe specimen chamber shallbe constructed in accordance with Fig. 1 with the referencedowels positioned as shown in Fig. 2.NOTE 3For some insulation materials it may be necessary to use alarger test chamber than shown to accommodate a more representativesample, when the test chamber
20、 size is changed, the precision may change.6.4 Weighing DevicesA device is required to weigh thetest material before loading into hopper. This device mustdetermine the test material mass to within 0.5 %.6.5 Specimen Preparation RoomAn enclosed area wherethe test material is blown into the specimen c
21、hamber isrequired to protect the blowing operation from wind or strongair currents. Room geometry should not influence the blowingstream from the hose as long as there is adequate clearancearound the sides to maneuver.7. Sampling7.1 Follow sampling plans given in the material specifica-tions, regula
22、tions or other appropriate documents when appli-cable. In the absence of such directions, randomly select thenumber of bags of product required for testing to meetconditions in 8.2.7.2 Condition the sample material by exposure in a condi-tioned space as prescribed by the contract or regulatorydocume
23、nts. If conditioning is not required, material must be inequilibrium with the storage environment.8. Specimen Preparation8.1 Clean the specimen chamber to be free of dirt andinsulation prior to the start of the test.NOTE 4Many factors can influence the installation characteristics ofblown insulation
24、. These include blowing rate, machine adjustments, thesize and length of the hose, and the angle and dimensions of the hoseoutlet in relation to the test chamber. Where available, use manufacturersinstructions to establish machine settings.8.2 From product label information, calculate the mass ofins
25、ulation required to fill the test chamber for the R-valueselected using the following formula:W 5 A 3 WSF (1)where:W = total mass of material required lb (kg),A = test chamber area, 80 ft2(7.4 m2), andWSF = label mass/unit area lb/ft2(kg/m2).8.3 Assemble the blowing machine, hose, and hose lengthcom
26、binations as appropriate for the material being prepared(see recommendations in Section 6).8.4 Set the blowing machine adjustments and select the feedrates in accordance with the insulation manufacturers recom-mendations. If the insulation manufacturer does not providethis information, consult the m
27、achine manufacturer for recom-mended settings. It is important that settings are representat-inve of those typically used in field application with thismachine.8.5 Place the weighed specimen into the empty blowingmachine before starting the machine. If the hopper is not largeFIG. 1 Installed Thickne
28、ss Test ChamberFIG. 2 Dowel Placement in Chamber FloorC1374032enough, fill it to capacity and have an assistant feed theremainder of insulation into the hopper as the test is progress-ing.NOTE 5If residual material is left in the machine, which cannot beblown out, then before testing the specimen ma
29、terial, fill machine withsome insulation and blow out as much as the machine will allow. Leavethe remaining amount in the machine after each trial.9. Test Procedure9.1 Blow the mass of insulation determined in 8.2 as evenlyas possible by moving the hose around outside edge of testchamber. It is help
30、ful to attach attic rulers to the inside wall oftest chamber.9.2 Return any insulation which falls outside the test cham-ber to the blowing machine until all material is installed withinthe test chamber.9.3 Remove any material clinging to each dowel and mea-sure the thickness of insulation to the ne
31、arest 0.25 in. (6 mm).It is helpful to slide a disc, made of approximately 5in.(127mm) diameter filter paper with a center hole 0.125 in. (3mm) larger than the dowel diameter, down each dowel untilcontact is made with the insulation and the disc is as level aspossible without compressing the insulat
32、ion surface (see Fig.3). Repeat this procedure for three trials.10. Calculation10.1 Calculation of Installed Thickness:10.1.1 Total the measurements described in 9.3 and divideby the number of dowels:T 5(n51NtnN(2)where:T = installed thickness for each trial (in.),t = installed thickness at each dow
33、el (in.), andN = total number of dowels.10.1.2 Add the installed thickness from each trial and divideby three. This number will be the installed thickness for thatR-values mass/unit area.TI5T11 T21 T33(3)where:TI= installed thickness (in.).11. Report11.1 Report the following information, including r
34、eferencesto applicable specifications and test method:11.1.1 The name, address, and other identification of the testlaboratory and the date of the report.11.1.2 The name and other identification of the material orproduct tested and the date of the test.11.1.3 The source of the material or product, t
35、he dateobtained, method of sampling and the manufacture date, ifavailable.11.1.4 The method and details of the specimen preparation,including blowing machine and machine settings used.11.1.5 The method and conditions of specimen conditioningif any.11.1.6 The installed thickness and the mass/unit are
36、a used.11.1.7 Any other pertinent observations or remarks.12. Precision and Bias12.1 PrecisionThe test results for representation of theperformance of the material or product will depend not only onthe characteristics of the test but also on the variability of thematerial or product and its sampling
37、 and specimen preparation.12.1.1 Table 1 shows an estimate of precision based on aninterlaboratory test conducted in 1992. Seven laboratoriescontributed data with full results secured from five laboratorieson a commercially available cellulose insulation material fromone production batch. Triplicate
38、 specimens of three weights ofinsulation corresponding to R-11, 22, and 30 (h3ft23F/Btu)were evaluated using this procedure (with the exception of teninstead of thirteen dowel rods).44Data is available at ASTM Headquarters. Request Research Report RR:C-161022.FIG. 3 Dowel MarkingsTABLE 1 Precision f
39、or Cellulose InsulationThree Specimens/FiveLaboratoriesRepeatability ReproducibilityR-Value(hft2F/Btu)MeanThickness(in.)r % of Mean R % of Mean11 4.21 0.4447 10.6 0.5808 13.822 7.31 1.1333 15.5 1.6572 22.730 9.47 0.7266 7.7 1.8799 19.8C137403312.1.2 Table 2 shows an estimate of precision based onano
40、ther interlaboratory test conducted in 1996. Four laborato-ries contributed data with full results from three laboratoriesusing fiberglass insulation from one production batch. Dupli-cate specimens of two different products were evaluated.Unlike the previous round-robin which targeted specificweight
41、s/ft2, the contents of each package was installed result-ing in slightly different weights/ft2, as shown in Table 3. Thishas the effect of producing higher or lower percentages ofrepeatability and reproducibility.512.1.3 Additional interlaboratory data are being obtainedand will be added to future r
42、evisions.NOTE 6Test results were evaluated using Practice E 691. Repeatabil-ity and reproducibility are herein defined as 2.8 times the correspondingstandard deviation to obtain a 95% confidence level. Repeatability is thevariability between test results within each laboratory, and reproducibilityis
43、 the variability between test results from different laboratories.12.2 BiasNo statement of bias can be made for this testmethod since there is no standard reference material.13. Keywords13.1 cellulose; cellulosic fiber; fibrous glass; installed thick-ness; insulation; loose fill; mineral fiber; pneu
44、matically ap-plied; thermal insulation; thicknessAPPENDIX(Nonmandatory Information)X1. ROUND ROBIN WITH FIBERGLASS INSULATIONX1.1 Table X1.1 shows an estimate of precision based onan interlaboratory test conducted in 1992. Five laboratoriescontributed data with full results from four laboratories us
45、ing acommercially available fiberglass insulation material fromdifferent production batches. Triplicate specimens of threeweights of insulation were evaluated corresponding to R-11,22, and 30 (h 3 ft23 F/Btu) using this procedure. Since thematerial selected for testing came from different production
46、batches and different production facilities, material variabilitywill influence the precision along with the test method.45Data is available at ASTM Headquarters. Request Research Report RR:C-161023.TABLE 2 Precision for Fiberglass InsulationTwo Specimens/ThreeLaboratoriesRepeatability Reproducibili
47、tyMaterialMeanThickness (in.)r % of Mean R % of MeanA 7.75 0.6261 8.1 0.9096 11.7B 8.22 1.1217 14.8 1.4425 17.6TABLE 3 Weight/Ft2Product A Product BBag 1 Bag 2 Bag 1 Bag 2Laboratory 1 0.379 0.378 0.385 0.374Laboratory 2 0.391 0.396 0.386 0.373Laboratory 3 0.400 0.388 0.389 0.369TABLE X1.1 Precision
48、for Fiberglass InsulationThree Specimens/FourLaboratoriesRepeatability ReproducibilityR-Value(hft2F/Btu)MeanThicknessr % of Mean R % of Mean11 6.51 0.6347 9.8 0.7781 12.022 11.36 1.3802 12.2 2.8882 25.430 14.11 0.9195 6.5 3.1949 22.7C1374034ASTM International takes no position respecting the validit
49、y of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that 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 reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be
