Smith Corrosion Control System

FlangeInsulationKitsFlange insulation sets are used in flangeapplicationwhereelectricalisolationandgalvaniccorrosion resistance are required. The kits areused as an insulator between dissimilar metalflanges or to electrically isolate sections of pipeworksinacathodicprotectionsystem,preventingthe flow of electrostatic charge along thepipelines. They are designed to minimize theeffects of electrochemical corrosion. Theinsulation kit consist one full length sleeve, twoinsulatingwashersandtwosteelwashersforeachoftheboltsintheflangeassembly.

CORROSIONCONTROLSYSTEMSmith Gaskets a division of Smith International Gulf Services excelled inmanufacturing of gaskets and sealingproductstoOil&Gasindustrysincepasttwodecades.OvertheyearsSmithGasketshaveenhancedengineering,technicalandmanufacturingcapabilitiestodevelopmorenewproductsandservicestocustomersglobally.

TypeEGasketsOutsidediameterofthistypegasketsextenduptotheexternaldiameteroftheflange.Thisgasketconsistsofboltholes, this helps to automatically align and center the gaskets and gives optimum protection against foreignparticleswhichcanshortouttheflange.TypeFGasketsThistypeofgasketfitswithintheboltcircleoftheflange.Externaldiameterofthegasketextenduptotheinsidediameteroftheboltholecircle.TypeDGasketsThistypeofgasketisRTJstylehoweverSmithGasketscorrosioncontrolsystemHPgasketsarebestalternativetotheRTJstylegaskets.

CORROSIONCONTROLLSYSTEMHP

HPInsulationKitCharacteristics

HP insulation gaskets have been specially designedfor critical services to withstand corrosiveenvironments. Apart from the excellent sealingcharacteristicsandsuperiordielectricproperties,HPisidealforgeneralsealingapplications.ThisgasketissuitableforRaisedFace,FlatFaceandRTJflangesinallpressureclasses.HPgasketconsistsofPTFEspringenergizedfacesealfixedtotheisolatinglaminates,whichispermanentlybondedtothemetalgasketcore.Duetotheenhanceddesign of PTFE spring energized seal, HP requiresless bolt stress to make effective sealing, also theenergized action helps to eliminate costly leaks andfugitiveemissions.

Insidediameterof theHPgaskets isexactlymatching to the flangeborewhicheliminate turbulent flowandflange face corrosion/washout. This gasket withstands severe critical service condition like vibration,temperatureandpressurefluctuations.

Applications; Insulation between dissimilar metal flanges to prevent

galvaniccorrosion.

Flangeinsulationinconjunctionwithcathodicprotection. Wellheadisolationfrominterconnectedflowlines. MatingmismatchedRTJflangetoRaisedFaceflange. EliminatefluidtrapcorrosionbetweenRTJflangeswhere

highCO2,H2Sandotheraggressivemediaarepresent. Eliminateturbulenceandflowinducedcorrosionbetween

RTJflanges. Protect against coating impingement on coated flange

face. Tosealbetweenflangessubjectedtovibration.

MetalCore

o GasketcoreshallbemadebysolutionannealedSS316LStainlessSteel,othermaterialareavailableuponspecialorder.

GasketIsolationRetainer

o NEMALI1GlassReinforcedEpoxyLaminateMaterial.Properties G10 G11CompressiveStrength,PSI 60,000 55,000FlexuralStrength,PSI 66,000 60,000TensileStrength,PSI 50,000 50,000DielectricStrength,Volts/mil 550600 550OperatingTemperature,0C Cryogenicto150 Cryogenicto180WaterAbsorption,% 0.1 0.12InsulationResistance,M 200,000 200,000

SealMaterialo Sealelementsarespeciallydesignedandintendedtoworkasaspecialbarrierthroughwhich

no contained media or other substance can pass through. Special grooves on the retainerencapsulatethesealandthusholdthesealinplaceinstatic.Teflonsealisthestandardoptionwhichwill coverall conditions;helicalwoundedspringprovidesenergizedspringactionandspecialsealgrooveminimizescreeporcoldflow.

Sleeveso MylarsleeveisthestandardoptionhoweverGREandothersleevescanbemadeavailableupon

request.Allsleevesshallbeprovidedwithfulllength,asshortlengthsleevesmaynotprovidetheadequatelevelofelectricalinsulationprotection.Mylar is the best choice for the standard application as it has relatively good resistance tocrushing,cracking,breaking,moreoveritislessexpensivethantheGREsleeves.SmithdoesnotrecommendPhenolicmaterialtobeusedduetoitsunreliablecharacteristics.

Washerso GREwashersarethestandardoption;purposeofthewashersistoelectricallyinsulatethenuts

fromtherestof the flangeassembly.SmithofferhighqualityGREwasherswhichhavemorethan60,000PSIcompressivestrengthandcanabsorbtheflangemadeupforcewithoutfail.

Steelwashersarerequiredtopreventthetwistingactionofthenutsfromscaringorgaugingtheinsulatingwashers.AllhighqualitysteelwashersshallbesuppliedwithZincplatingwhichhavehighcorrosionresistanceandmechanicalstrength.StainlessSteelandPTFEcoatedSteelwashersareavailableuponrequest.

CORROSIONCONTROLLSYSTEMLPAdvantagesofLPgaskets

Excellentsealingsolutionforlowpressureservices. Reliableenergizedsealprovidesextrasealing. GREgasketretainerprovidesexcellentinsulation. Highstrengthlaminateseliminatetheriskoffailureduetoovertorqueofthebolts. Gasketinternalboreextendedtomatchtheboreoftheflangestoprotecttheflangefacefrom

corrosionandwashout. Energizedsealwhichisencapsulatedinthegrooveeliminatethecoldflow. Longlife,maintenancefreedesign. Easy,quickinstallation,lowseatingstressrequiredhencelessforceontheflangeandbolts.

AllLPgasketretainershavethicknessof3mmandkitconsistsoffulllengthMylarsleeve,GREwasherandZinccoatedSteelwashersforeachbolt;othermaterialcombinationsmadeavailableuponrequest.GasketOrderingGuide Size Class GasketTypeE/F FlangeType TypeofGasketHP,LP Quantity

SmithsLPgasket isanoncriticalapplicationgasketdesigned for electrical flange isolation and sealingapplications.Thistypeofkitisrecommendedforuseinraised face/flat face flangesrateduptoclass300.LP gasket provides excellent isolation and therectangular sealing element fixed in a specialdesigned groove makes for effective energizedsealingandisolation.LP gasket retainers are based on high quality GRElaminates, which have excellent dielectric strength,very good mechanical properties and sealingcharacteristics. This LP design can easily replaceunreliable, failure prone phenolic based gaskets.These gaskets are available in two models such asRaisedRaceandFullFace,alsoavailableinallflangeconfigurationssuchasASME,DIN,JIS,ISOetc.PTFEisthestandardsealoptionhoweverothersealmaterialsareavailableonrequest.