Division 22 23 Ebook Page 78 FOAMULAR XPS Pipe Insulation Installation Guidelines

PubNo.10013974-A.Rev.9/2015 Page 8 of 24 FOAMULAR!XPS!Pipe!Insulation Installation!Guidelines 11. Onfactoryappliedvaporretardersystem,lapjointshallbesealedwithSSLtape. (Figure5,AppendixA) 12. Buttjointsshallbecoveredwithvaporretardertapeusingthesame3or9oclockorientation asthelongitudinalseamonthevaporbarrier. 13. Forfactoryappliedfacingsystems,applythevaporretardertapearoundthebuttjointoverlap perthemanufacturersinstallationdirectionsintheappropriateorientationasnotedabove. (Figure6,AppendixA) 14. Elbowsandfittingsshallbewrappedwithvaporretardertapeorcoveredwithamastictype vaporretarderproduct.Vaporretardertapeshallbewrappedinaspiralconfiguration.Ifusing mastictypevaporretarderatfittingsandelbows,formmasticsothatfittingcoverscanbe appliedtrueandtight. 15. Polyurethanefoamfilledfittingsarenotacceptable. E. Tank!&!Vessel!Equipment!Insulation! Note: Allinsulationandaccessorymaterialsshallbethesameasthosespecifiedontheassociatedpipe insulation.FollowthesameGeneralguidelinesforpipeinsulationwithTanks&Vessels. 1. VesselHead a) Headsegmentsshallbeperformedtofitthecontouroftheheadandeliminatevoids. b) Flatheadsectionsshallbeinstalledwiththesamenumberoflayersandthicknessasthe vesselwalls. c) Thevaporretarderontheheadsectionsshallbecontinuousandofthesamematerialas thevesselwallsofthetank. 2. VesselWalls a) Curvedsegmentsshallbefabricatedtofitthecontourofthesurfaceandinequalwidth piecestogoaroundthevessel.(Figure15,AppendixA) b) Everyeffortshouldbemadetoeliminatethroughjoints. c) Verticalvesselsgreaterthan4feetindiametershallhaveainsulationsupportringwelded orboltedaroundthebottomofthetanktopreventinsulationmovement. d) Indoublelayersystems,staggerbothhorizontalandverticaljointsbetweentheinnerand outerlayers.(Figure15,AppendixA) e) Wheretheheadmeetsthesidewallinainadoublelayerapplicationtheinnerlayerand outerlayershallbeoffsetbyaminimumdistanceequaltothethicknessoftheinsulation. f) Secureinsulationwithminimumsteelbandson12centers. g) Onverticalvessels,installvaporretarderandbeginningatthebottomofthevessel workingupwardtocreateashingleeffecttonaturallyshedwater. h) Installvaporretarderwithaminimumof2overlapatallverticalandhorizontaljoints.

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