ASTM_D_7982_-_15_2021.pdf

Designation:D798215(Reapproved 2021)Standard Practice forTesting of Factory Thermo-Fusion Seams for FabricatedGeomembrane Panels1This standard is issued under the fixed designation D7982;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 manufacturing quality controlguidance for the factory seaming of fabricated geomembranepanels.This practice is not to be considered as all-encompassing since there are a large number of geomembranetypes,weld types,and fabrication processes that cannot beanticipated and covered in this document.1.2 This practice is written for factory-fabricated geomem-brane panels only and does not apply to field fabrication onsite.1.3 This practice does not cover joining of materials duringthe primary geomembrane manufacturing process such as thevulcanized overlaps found in EPDM sheet.1.4 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 environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.5 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,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D4439 Terminology for GeosyntheticsD6392 Test Method for Determining the Integrity of Nonre-inforced Geomembrane Seams Produced Using Thermo-Fusion MethodsD7408 Specification for Non-Reinforced PVC(PolyvinylChloride)Geomembrane SeamsD7700 Guide for Selecting Test Methods for GeomembraneSeamsD7747/D7747M Test Method for Determining Integrity ofSeams Produced Using Thermo-Fusion Methods for Re-inforced Geomembranes by the Strip Tensile MethodD7749 Test Method for Determining Integrity of SeamsProduced Using Thermo-Fusion Methods for ReinforcedGeomembranes by the Grab MethodD7865 Guide for Identification,Packaging,Handling,Stor-age and Deployment of Fabricated Geomembrane Panels3.Terminology3.1 For definitions of terms related to geomembranes,referto Terminology D4439.3.2 Definitions:3.2.1 destructive test samplea seam sample taken before,during,or after production welding that is used to determinecompliance of production seams with a specification.3.2.2 post-production testa destructive test sample testedat the conclusion of the manufacturing process(productionseam or trial seam)to qualify the previously produced produc-tion seams.3.2.3 pre-production testa destructive test sample tested atthe beginning of the manufacturing process to qualify subse-quent production seams.3.2.4 production seama factory seam that is made as partof a finished fabricated panel.3.2.5 trial seama seam made prior to or after productionwelding,made by the same personnel,using the samegeomembrane material,the same welding unit,and the sameseaming conditions used in the actual production seamingprocess.Trial seams are used to provide destructive testsamples without damaging production seams.3.2.6 welding uniteach individual welding station or pieceof welding equipment used to make a single seam.4.Significance and Use4.1 This practice is intended to aid fabricators,suppliers,purchasers,and users of fabricated panels in the testingrequirements for factory-created seams during fabrication ofgeomembrane panels.1This practice is under the jurisdiction of ASTM Committee D35 on Geosyn-thetics and is the direct responsibility of Subcommittee D35.10 on Geomembranes.Current edition approved July 1,2021.Published July 2021.Originally approvedin 2015.Last previous edition approved in 2015 as D7982 15.DOI:10.1520/D7982-15R21.2For 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 StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.14.2 Factory seaming of geomembranes has advantages overfield seaming including less temperature variation,no wind,fewer contamination(soil and water)concerns,a consistentwork surface for welding,and options for factory equipmentthat may not be robust enough for the fiel