DavidMcQuillingPanhandleEnergy

Outliney PlantAppliedvs.FieldAppliedCoatingsy GirthWeldCoatingsy FBEpatchsticksy RecentConcerns

PlantAppliedVsFieldAppliedPlantAppliedCoatings FieldAppliedCoatingsy Controlledenvironment

y Centralizedinspectiony Permanentmountequipmenty Nearcontinuouslineoperationy Routinedestructivetestingy Highqualityair/powersourcesy Blastmedia/coatingstorage/

handling/recyclingproceduresy IndustryGuidelines(NACESP

0394)y Handing/Transportation

y Mustaddressenvironmentalconditionsy Wind/Dust/Heat/Rain/

Coldy Multiplefieldinspectionpointsy Movingequipmenty Constantstart/stopoperationy Limitedtestcapabilityy Onsiteairandpowergenerationy Fieldblastmedia/coatingstorage

/handling/recyclingproceduresy IndustryGuidelines(NACESP

0402)y Handling/Lowering/Backfill

HowDoWeQuantifyFieldCoatingQuality?y Whatisgoodenough?y Manufacturersperformancedataisgenerallynotbasedonfieldappliedproducts.

y Unrealistictoexpectfieldappliedcoatingstoperformaswellasthoseappliedinacoatingmillorlaboratorysetting.

y Needtoremovesubjectiveevaluationsy Doesntlookprofessionaly Bubblesincoatingy Shouldntsmokewhenappliedtoheatedpipey Contaminationofsubstratebyheatingaftercleaning

y Drivingfactorsshouldberelatedtoperformance

PHMSAConstructionIssuesGirthWeldCoatingsFusionBondedEpoxy TwoPartEpoxyy IncorrectApplication/Procedures

y Coatingovermudorrusty Failuretofollowmanufacturers

recommendationsy IncorrectfeatheringofexistingFBEy Waterinpipeduringheating

y EnvironmentalIssuesy Inconsistentpipetemperaturesy Coatinginhighwindwithblowing

dirty MechanicalIssues

y DamagetofactoryFBE(heat/mechanical)

y ProceduralIssuesy Nospecificationsonsite

y IncorrectApplication/Proceduresy Failingtofollowmanufacturers

instructionsy Inadequatesurfacepreparationy Applicationafterepoxystartsto

sety Inadequatemixingy Applyingaboveorbelow

recommendedtemperaturey UsingunapprovedIRtemperature

sensors

CommonLiquidGirthWeldCoatingsy 100%SolidsEpoxyy Denso7000/7200y SPC3888/4888y 3MScotchkote 323y Powercrete F1y NapGard 71850

y 100%SolidsEpoxy/Urethaney SPC2888

y 100%SolidsPolyamideEpoxyy NapGard 71847/1848PatchCompound

y Near100%SolidsEpoxy Polyaminey Wilko GatorKure(96%solids)

FieldAppliedCoatingsHowDoWeEnsure/ImproveQualityy Proceduresy Shouldincludeproductspecificcoatingparametersy Shouldaddressrealisticfieldconditionsandvariablesy Shouldaddresswhatifconditionsandprovidealternativesy Shouldclearlyoutlinestopworkconditionsy Shouldmeshwithcapabilitiesofonsiteequipmenty Shouldbebasedoncoatingperformancedatay Shouldhaveprovisionsforchangesduringconstruction

FieldAppliedCoatingsHowDoWeEnsure/ImproveQualityy FieldPersonnelTrainingy DifficulttobelieveanyoneonROWbelievescoatingovermudis

acceptabley Flashrusty Failuretofollowprocedures

y InspectorTraining/Knowledgey Cannotinspectqualityintoaprojecty Cannotcatcheverythingy Moremanualstepswhenusingliquidgirthweldcoatings

y AllTrainingMustbeProductSpecific OneSizeDoesNotFitAll

HotMeltPatchSticksy Easytoapplyy Usableinallweatherconditionsy Quicksettingforimmediateinstallationandhandlingy Nosolventsy Nomixing,metering,orpotlifeproblemsy Flexibley Colormatchedtofusionbondedepoxycoatings

y Easytousey Speedsproductiontimey Facilitatesquickrepairattheditch

HotMeltPatchSticksy Ifitssoeasy,whydowehavesuchaproblem?y Failingtofollowmanufacturersinstructionsy Notadequatelyheatingpipebeforeapplicationy Inadequatesurfacepreparationy Useondefectslargerthan0.5in2y Applicationovertwopartepoxyy Improperaccelerateddryingbypattingy Useonbaremetal

HotMeltPatchSticksManufacturersInstructionsy VariationsinPlantandFieldAppliedSpecificationsy ThicknessofRepairsy SurfacePreparation

y VariationsbetweenManufacturersy ThicknessofRepairsy SurfacePreparationy MaximumSizeofRepairAreay Smallholidaysanddamagedareasy Minorpinholesandabrasionsy Holidaysupto2mmindiametery Recommendedforpinholesbutcanbeusedtorepairotherdefectsat

discretionofenduser

HotMeltPatchSticksNACESP0402y Section 8.2 Coating System Repairsy Patched areas should overlap the parent coating aminimum of 13 mm (0.50 in.).y The surface to be repaired should be suitably preparedto ensure adhesion of the patch material.y Minimum thickness of the repaired coating shall be inaccordance with Section 7 of this standard.

PatchSticksRepairstoBareSteely NoreferencecanbefoundtosupportpositionthatHotMeltPatchStickscannotbeusedonbaresteel.

y Scotchkote 226Pcanbeusedonholidaysupto2mmindiameter.Thefollowing3Mtwopartepoxiesshouldbeusedforbaresteelareaslargerthanpinholes,dependingonthefunctionalandapplicationpropertiesrequired:

Scotchkote 323Scotchkote 323iScotchkote 352Scotchkote 327

AccuracyofIRGunsy Widelyusedinindustryinbothplantandfieldapplicationsy VariationsbetweenFBEManufacturersSpecificationsy Heattemperaturesshallbemonitoredandcontrolledwithanopticalandrecordingpyrometer.PyrometersinstalledtomonitorpipetemperaturebeforethecoatingapplicationshallbecheckedperiodicallywithaTempil Sticktoassureaccuratecalibrationoftheinstrument.

y Infraredsensingdevicesshallbeusedtomonitorthetemperatureoftheappliedcoating.Donotuseonuncoated/baresteel.

y Duetovariedemissitivity;optical/IRpyrometersshouldnotbeusedtodeterminepreheatonblastedsurfaces.

y Liquidcoatingvendorsgenerallysupportuse

ContaminationofSubstratewithAppliedHeaty Applicationofheataftercleaningbutpriortocoatingapplicationisacommonindustrypracticey ApplicationstandardsforFBEproductsrequirenoncontaminatingheatsourcey Theheatsourceshallnotleavearesiduetocontaminantonthepipesurface.

y Preheattheparentcoatingsurfaceusinganoncontaminatingheatsource,suchasportablehandheldbutanetorch.

y Theheatsourceshallnotleavearesidueorcontaminantonthepipesurface.Oxidationofthesteelintheformofblueingorotherapparentoxideformationisnotacceptable.

SteamfromPreHeatingPipeBeforeCoatingy Commonindustrypracticetopreheatpipepriortoapplicationof100%solidliquidcoatingstoacceleratecuretimey Productmaysteamwhenappliedtohotpipey Manufacturersproducttestingindicatesnodegradationofcoatingperformancewhenappliedoverheatedpipey Allproductsaredifferenty Tgy VOCContent

AirBubblesinEpoxyCoatingsy Voidswillexistinallepoxycoatingsy Standardsforacceptablelevelsporosityarewidelyusedintheindustryy ReferenceAppendixGofRP0394

y Appearanceofbubblesatsurfaceisgenerallynotacauseofconcern

PathsForwardy Focusontechnicalaspectofanyqualitycontrolissuesrelatedtocoatingsystemsy Focusonperformanceofindustrialcoatingsystems,notaestheticsy Onesizedoesnotfitall cantpaintwithabroadbrushy Proceduresandtrainingarecriticaltoquality

Field Applied CoatingsOutlinePlant Applied Vs Field AppliedHow Do We Quantify Field Coating Quality?PHMSA Construction Issues Girth Weld CoatingsCommon Liquid Girth Weld CoatingsField Applied CoatingsHow Do We Ensure / Improve QualityField Applied CoatingsHow Do We Ensure / Improve QualityHot Melt Patch SticksHot Melt Patch SticksHot Melt Patch SticksManufacturers InstructionsHot Melt Patch SticksNACE SP0402Patch Sticks Repairs to Bare SteelAccuracy of IR GunsContamination of Substrate with Applied HeatSteam from Pre-Heating Pipe Before CoatingAir Bubbles in Epoxy CoatingsPaths Forward