1、Designation: C1809 15Standard Practice forPreparation of Specimens and Reporting of Results forPermeance Testing of Pressure Sensitive Adhesive SealedJoints in Insulation Vapor Retarders1This standard is issued under the fixed designation C1809; the number immediately following the designation indic
2、ates the year oforiginal adoption or, in 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 practice provides instruction for the
3、preparation oftest specimens of pressure sensitive adhesive (psa) sealed jointsof the type employed in insulation vapor retarder systems, forsubsequent testing per Test Methods E96/E96M to determinethe water vapor permeance (“permeance”) of those joints. Itdoes not cover preparation of other types o
4、f joints.1.2 This practice also provides requirements for the contentof reports issued in conjunction with Test Methods E96/E96Mtesting of these joints.1.3 Joints are made with factory coated psa tapes or psacoated laminate jacket (vapor retarder cladding) materials.1.3.1 The types of materials and
5、joints to be tested aregenerally encountered in mechanical systems in commercialand industrial insulation applications, and in HVAC systemsinsulation.1.3.2 Typical psa joints that are employed in vapor retardersystems for mechanical insulation include:1.3.2.1 Overlap with double-sided tape.1.3.2.2 O
6、verlap with coated laminate jacket.1.3.2.3 Butt with single-sided insulation tape.1.3.2.4 Intersection of overlap and butt joint.1.4 Test Methods E96/E96M is to be followed for specifictesting instruction beyond the areas of guidance providedherein, that is, after the specimens are prepared in the d
7、esiredtest configuration.1.5 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 standard.1.6 This standard does not purport to address all of thesafe
8、ty 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. Referenced Documents2.1 ASTM Standards:2C1775 Specification for Laminate
9、 Protective Jacket andTape for Use over Thermal Insulation for Outdoor Appli-cationsE96/E96M Test Methods for Water Vapor Transmission ofMaterialsC168 Terminology Relating to Thermal Insulation3. Terminology3.1 Definitions:3.1.1 laminate jacketsee Specification C1775.3.1.2 water vapor permeance, wat
10、er vapor barrierseeTerminology C168.3.2 Definitions of Terms Specific to This Standard:3.2.1 pressure sensitive adhesive, nan adhesive that re-quires some degree of pressure, and only pressure, to ad-equately bond to a substrate.3.2.2 SSL tape, nA pressure sensitive, double-sided “SelfSealing Lap” t
11、ape that is commonly used to seal the longitu-dinal overlap joint in pipe insulation jacketing.4. Summary of Practice4.1 Specimen preparation as directed herein addresses con-figuration and sealing of psa joints for subsequent permeancetesting.4.2 The permeance test itself is performed per Test Meth
12、odsE96/E96M.5. Significance and Use5.1 PSA joints are a necessary and critical component of aninsulation vapor retarder system and, in addition to knowing1This practice is under the jurisdiction of ASTM Committee C16 on ThermalInsulation and is the direct responsibility of Subcommittee C16.40 on Ins
13、ulationSystems.Current edition approved April 15, 2015. Published May 2015. DOI: 10.1520/C1809152For 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 Docume
14、nt Summary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1the permeance of the vapor retarder being used, assessing thepermeance of the joints is necessary to indicate the expectedperformance of the system.5.2
15、 Test Methods E96/E96M does not include instructionsspecific to preparing multiple-piece assemblies such as psajoints. This practice provides those instructions.5.3 There are a number of variables involved in making apsa joint, and those need to be considered in specimenpreparation and data reportin
16、g. Such variables include:5.3.1 Means of applying pressure to seal the joint,5.3.2 Amount of pressure applied,5.3.3 Dwell time prior to test,5.3.4 Backing surface upon which joint is prepared,5.3.5 Ambient conditions for specimen preparation,5.3.6 Dimensions of materials,5.3.7 Configuration of joint
17、,5.3.8 Dish size,5.3.9 Test area of specimen, and5.3.10 Area of joint.5.4 It is not likely that field-installed joints will achieve asgood a seal as those prepared in the laboratory. Field installa-tions can involve extremes in ambient conditions, surfacecontamination, limited space, varying pipe ra
18、dii, varying pres-sure applied, and variation in base insulation density andrigidity.5.4.1 Results obtained through application of this practiceand Test Methods E96/E96M are best used to compare mate-rials and configurations. It is urged not to equate actual fieldperformance with the results obtaine
19、d in a laboratory setting.6. Procedure6.1 Use an aluminum test dish with nominal outsidediameter of 6 in. (152 mm) and specimen template withnominal outside diameter of 5.75 in. (146 mm).6.2 Use a wax damming plate that produces an exposedspecimen test surface diameter of 5.25 in. (133.5 mm).6.3 Pre
20、pare specimens on a flat, smooth, hard and rigidsurface, such as laboratory bench top, under standard condi-tions of 73, 6 2F (23, 6 0.7C) and 50 6 5% RH.6.4 For butt joints, position the tape centered over twoadjacent sheets of vapor retarder (see Fig. 1).6.4.1 Separate the two sheets by a gap of 0
21、.5 inch (12 mm)to duplicate a nominal field installation gap.6.4.2 Apply a 3 in. (76mm) wide tape, centered over thegap.6.5 For overlap Self-Seal Laps (SSL), or for overlap clad-ding joints, position the tape and vapor retarder sheets, orcladding sheets, so that there is a 1 inch (25 mm) overlap (se
22、eFig. 2).6.6 For combination butt and lap joints (as with pipeinsulation), first prepare a sheet with the lap joint then cut it inhalf, perpendicular to the joint. Make a butt joint per 6.3 withthe two resulting sheets.FIG. 1 Butt Joint Seam witha3in.Single-sidedTapeC1809 1526.7 In all cases, make t
23、he vapor retarder sheet somewhatlarger than the test specimen dimensions, then trim to correctsize after making joint(s).6.8 To seal the joint, use a 4 in. (102 mm) wide plastic tapeapplicator squeegee, available from insulation tape suppliers.6.8.1 Apply a manual force of nominally 5 lbs. (2.3 kg)w
24、hen rubbing the joint with the squeegee.6.8.1.1 Practice exerting this force by applying the rubbingmotion on a flat digital scale of 10-20 lb. (4.5-9.0 kg) capacity.6.8.2 Rub down the joint using two passes in one directiononly.6.9 Do not apply additional force or passes to any parts ofthe joint.6.
25、10 If one surface of the vapor retarder or tape is hygro-scopic (such as standard ASJ with exposed paper), test withnon-hygroscopic side up. (In this case the joint is “upsidedown”, but this should not affect moisture ingress.)7. Test Methods7.1 Test Methods E96/E96M is to be used, employing awax/re
26、sin seal.7.2 Test the vapor retarder material by itself (without joints)to establish its permeance.7.3 Test the specimens with joints.NOTE 1Per Test Methods E96/E96M, for a given configuration, threeor four specimens, plus a dummy specimen, are tested.7.4 Any test chamber conditions may be employed.
27、 Thefollowing are either commonly used, or may be appropriate forexpected end use conditions or specification requirements:7.4.1 Test Methods E96/E96M Procedure A, desiccantmethod at 73F (23C).7.4.2 Test Methods E96/E96M Procedure B, water methodat 73F (23C).7.4.3 Test Methods E96/E96M Procedure E,
28、desiccantmethod at 100F (38C).8. Calculation of Result8.1 Permeance of the psa joint is based on the area of thejoint.8.2 The permeance of the vapor retarder must be known.8.3 Calculate the permeance attributable to the psa jointalone as follows:Pj5 As Ps! 2 Av Pv!Aj(1)As= Area of full test specimen
29、Ps= Permeance of full test specimenAv= Area vapor retarder only (area not covered by joint)Pv= Permeance of vapor retarder (known)Aj= Area of psa joint (total area of specimen minus the areaof two vapor retarder-only segments)Pj= Permeance of psa joint in test, at the tested widthKnown values:Area o
30、f full test specimen: 21.65 in2FIG. 2 1 in. Overlap SeamC1809 153Area of vapor retarder only, for butt joint: 6.80 in2Area of joint, butt: 14.85 in2Area of vapor retarder only, for overlap joint: 16.53 in2Area of joint, overlap: 5.12 in2NOTE 2See Appendix X2 for further discussion of calculation.9.
31、Report9.1 The following information, at a minimum, is to beincluded in the test report:9.1.1 Vapor retarder identification,9.1.2 Tape or laminate jacketing identification,9.1.3 Test conditions,9.1.4 Type of joint, and9.1.5 Calculated permeance of psa joint, at stated testedwidth.10. Keywords10.1 but
32、t joint; insulation tape; laminate jacketing; overlapjoint; permeance; pressure sensitive; SSL; vapor retardersystemANNEX(Mandatory Information)A1. GEOMETRY AND DIMENSIONS OF TEST SPECIMENSA1.1 When testing a singular material per Test MethodsE96/E96M, the size and shape of the exposed specimen surf
33、aceis of no impact; only the area need be known.A1.2 In order to obtain standard performance values for thejoints in this test, it is necessary to establish standard geometryand dimensions for the specimens.A1.3 Varying the overall size of the specimen, the width ofthe joint, or its location in the
34、test dish (if round) will impactthe result obtained.A1.4 Given the above, these parameters have been stan-dardized for the purposes of laboratory testing and reportingresults for pressure sensitive joints.APPENDIXES(Nonmandatory Information)X1. DISCUSSION OF CALCULATION AND REPORTING OF PERMEANCE FO
35、R THE TESTED JOINTX1.1 The permeance calculation uses the area of the joint-that area made up of the pressure sensitive adhesive and thematerial to which it is originally applied (coated).X1.2 When using a circular test dish, the area of the joint isfound by subtracting the area of the two segments
36、that containthe vapor retarder only from the total specimen area.X1.2.1 To calculate the area of the vapor retarder only in acircular test dish, (two segments) and of the joint, two valuesmust be known: (1) radius of exposed specimen area, and (2)distance from joint edge to edge of specimen (for bot
37、hsegments), measured perpendicularly from the midpoint of thetape edge.X1.2.2 These areas are easily determined by the specimendiameter and joint width dimensions specified in the procedure,using a calculator that provides segment area.X1.3 There are two possible routes of entry of moisturevapor thr
38、ough the seal: (1) laterally through the adhesive layerand (2) through the tape substrate, or backing, which is a vaporretarding material, then into and through the adhesive layer. Insome cases, such as a heavy aluminum foil tape, the backingitself is impermeable, so the only route of entry is throu
39、gh theadhesive layer.X1.4 For practicality in expressing performance, the perme-ation of water vapor is attributed to the full area of the joint.C1809 154X2. ADDITIONAL INFORMATION TO BE PROVIDED IN REPORTS OR PUBLISHED DATAX2.1 For reports, when specimens are prepared in advanceby other than the te
40、sting lab, this should be noted and thepreparer identified.X2.2 Published data should include the following informa-tion to describe the test method employed:X2.2.1 ASTM Test Methods E96/E96M,X2.2.2 The specific Test Methods E96/E96M procedure(method and conditions), or other test conditions, employ
41、ed,andX2.2.3 The wording: “Specimens prepared per PracticeC1809.”ASTM 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 validity of any su
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