ASTM_C_1809_-_16.pdf

Designation:C180916Standard 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 indicates 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 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 of 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 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 Overlap 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 desiredtest 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 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 limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2C1775 Specification for Laminate 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:3.1.1laminate jacketsee Specification C1775.3.1.2 water vapor permeance,water 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”tape 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 MethodsE96/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 InsulationSystems.Current edition approved March 1,2016.Published April 2016.Originallyapproved in 2015.Last previous edition approved in 2015 as C1809 15.DOI:10.1520/C1809-16.2For 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 Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 the permeance of the vapor retarder being used,assessing thepermeance of the joints is necessary to indicate the expectedperformance of the system.5.2 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 reporting.Such variables include:5.3.1Means 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,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 labora