Sealing Gaskets - GPT

GasketSeal fiSealing GasketsGasketSeal sealing gaskets areconsidered to be one of the mosteffective methods for sealingmating surfaces of all types. Thegasket consists of two molded halfO rings (with precise crown tovoid ratio) mounted in grooves onopposite sides of a retainer. While maintainingall the advantages of a full O ring seal, the halfO rings eliminate the need for sealing grooves in themating surfaces which also eliminates positioning and alignment concerns.GasketSeal gaskets are available in a wide variety of retainer and sealingelement combinations for matching gaskets to service and environmental conditions.SizesAll standard ANSI and API flange sizes from 1/2and above.Custom odd sizes and shapes.Pressure RatingsAll ANSI and API rated flanges.Pressures from hard vacuum to 50,000 psi and higher.MetalInsulatingRetainerRetainerMaterialsMaterialsSealingElementsAluminum Ceramic Buna-N (Nitrile)Brass Epoxy Glass Buna-SCarpenter 20 Glass ButylCarbon Steel Lucite EPDMCast Iron Melamine HypolonClad Steel Materials Phenolic Natural RubbersCopper Polyester Glass NeopreneDuctile Iron Polyethylene NylonHastelloy B Silicone Glass PolyurethaneHastelloy C Vinyl Silicone RubberHastelloy XViton fiInconel XMonelNickel 200Soft IronStainless SteelTantalumfiDuPontTinTitaniumVanadiumBefore TighteningThe flange faces come into contact withthe crown of the sealing elements. A sthe flange is tightened the crowns arecompressed into the molded-in voidsin the sealing elements, resulting in aseal that will maintain positive,dynamic contact against the flangefaces under all conditions.After TighteningThe flange faces have come into firm contact withthe retainer, thus encapsulating the sealing elementswithin grooves and guarding themfrom exposure to external environmentsor internal media. At the same time, theelastic memory characteristics of theconfined sealing elements results inzero m and y factors, making itpossible to effect and maintain a positiveseal at the lowest possible compressiveload.Page 4

Suggested Sealing Gasket Material CompatibilityMedium Retainer Seal Temp. Range F Temp. Range CAcetone Phenolic Nitrile +32 to +80 0 to +27Air G-10 Nitrile -65 to +225 -54 to +107Ammonia Dry G-10 Teflon -65 to +220 -54 to +104Ammonia (Wet)*** G-10 Teflon +32 to +100 0 to +38Bleach G-10 Teflon +32 to +80 0 to +27Butylene (Butidiene) G-10 Teflon +32 to +100 0 to +38Carbon Dioxide G-10 Nitrile +32 to +150 0 to +66Caustic Soda (NaOH) G-10 Teflon -65 to +225 -54 to +107Cryogenic G-10 Teflon -300 to +280 -184 to +138Ethanol G-10 Nitrile +32 to +100 0 to +38Ethylene (Ethene) G-10 Teflon +32 to +80 0 to +27Fuel Oil G-10 Viton -20 to +280 -29 to +138Gas, Natural Phenolic Nitrile -65 to +220 -54 to +104Gas, Sour Phenolic Viton -20 to +220 -29 to +104Gasoline G-10 Teflon -65 to +225 -54 to +107Hydrogen G-10 Nitrile -65 to +250 -54 to +121Jet Fuel G-10 Viton -20 to +225 -29 to +107LNG G-11 Teflon -300 to +100 -184 to +38Mercaptan G-10 Teflon -20 to +80 -29 to +27Methanol G-10 Teflon +32 to +100 0 to +38MTBE G-10 Special Nitrile +32 to +80 0 to +27Nitrogen Phenolic Nitrile -65 to +220 -54 to +104Oil, Crude G-10 Viton -20 to +280 -29 to +138Oxygen** G-10 Teflon -65 to +250 -54 to +121Pentane G-10 Teflon +32 to +80 0 to +27Propane G-10 Nitrile or Teflon +32 to +80 0 to +27Propylene G-10 Viton +32 to +80 0 to +27Sewage G-10 Viton -20 to +280 -29 to +138S pent Liquor G-10 Teflon +32 to +100 0 to +38S team* G-7* Teflon To +450 To +232S team G-3 Teflon To +392 To +200S team* Yellow Jacket No Seal To +450* or (+392) To +268* or (+200)S tyrene G-10 Teflon +32 to +80 0 to +27Sulphur (Molten) G-10 Teflon +32 to +280 0 to +138Tolulene G-10 Viton or Teflon +32 to +150 0 to +66Water (hot) G-10 Nitrile +175 to +250 +79 to +121Water (Potable) G-10 Nitrile +32 to +250 0 to +121Water (Sea) G-10 Nitrile +32 to +250 0 to +121White Liquor G-10 Teflon +80 to +280 +27 to +138* = G-7 material should not be used with hydrocarbons, not even trace amounts.** = These are organic materials that will feed a fire if a leak occurs and an ignition source exists.*** = Ammonia (wet) - Data to +100 F (+38 C) only (same materials as dry).General Notes:The foregoing performance data are intended as guidelines only. Performance suitability for any specific applications shouldbe determined by the user.Variation in temperature, pressure, concentration or mixtures acting synergistically may preclude suggested service use.Material selection is at the sole risk of the user. Consult with a specialist or PSI factory for specific applications.PSI s responsibilities will be limited to those listed in the PSI standard warranties.Metal Retainers:LineBacker gaskets are available with a wide range of metal retainers to offer compatibility withflange metals, for extremely hazardous fluids or for extremes in termperatures and pressures.Page 7

LineBacker fiZero, 250 & 251Sealing GasketsSignificant chemical and materialcomposition improvements haveprovided an opportunity for thedevelopment of three gaskets,designed to address the regulationsassociated with asbestos substitutegaskets and fugitive emissions.LineBacker Zero, LineBacker 250 andLineBacker 251 gaskets are manufactured from newproprietary materials that provide excellent resistanceagainst environmental leakage without the health hazardsassociated with asbestos type gaskets.In addition to providing zero environmental leakage, this newline of sealing gaskets:Eliminate flange leaksGuard against blowoutsProtect against hostile environments and fireResolve asbestos substitution concernsEliminate cold flow problemsReduces inventory costsIncreases the overall life of the systemSizesAll standard ANSI and API flange sizes from 1/2and above.Custom odd sizes and shapes.Pressure RatingsAll ANSI and API rated flanges.Pressures from hard vacuum to 50,000 psi and higher.LineBacker fi Zero TM LineBacker fi 250 TM LineBacker fi 251 TMASTM D-149 Dielectric StrengthVolts/mil (Short Time)500 500 550ASTM D695 Compressive Strength 25,000 ps i 50,000 ps i 50,000 ps iASTM D229 Water Absorbtion 1.8% 0.15% 0.15%ASTM D790 Flexural Strength 20,500 ps i 50,000 ps i 50,000 ps iASTM D785 Hardness 85 110 110ASTM D256 IZOD Impact Strength 1.2 ft-lbs/in 11.5 ft-lbs/in 12.5 ft-lbs/inASTM D638 Tensile Strength 23,000 ps i 40,000 ps i 45,000 ps iASTM D32 Shear Strength 10,000 ps i 18,000 ps i 20,000 ps iASTM F-36 Compressibility 1.8% 2.0% 2.1%ASTM F-36 Recovery 100.0% 88.9% 88.9%ASTM F-38(B) Creep Relaxation 65.7% 17.2% 5.1%DIN-3535 Gas Permeability 0.00 cm3/min. 0.29 cm3/min. 0.43 cm3/min.DIN 52913 S tress Relaxation N/A 49.4N/mm2 N/AOperating Temperature -60 to +220” F. -60 to +350” F. Cryogenic to +250” F.-51 to +104” C. -51 to +177” C. Cryogenic to +121” C.Page 8

Suggested Sealing Gasket Material CompatibilityLineBacker fi LineBacker fi LineBacker fiZero TM 250 TM 251 TMAmmonia R R RAmmonium Hydroxide F F RBenzene R R RButane NT NT RCalcium Hydroxide U U RCrude Oil R R RDilute Acids R R RDilute Caustics U R REthanol N R N R RGasoline R R RHydrocholric Acid 20% R R RHydrogen N T N T RHydrogen Sulfide NT NT RJet Fuel R R RKerosene R R RMethanol R R RNaptha R R RNatural Gas R R RNitric Acid 10% U U RNitric Acid 20% U U FPotable Water N R N R RPropane R R RSalt Brine R R RSea Water R R RSewage R R RS team to 350” F U R US team Condensate to 250” F U R FSulfuric Acid 10% U U RTolulene F F RR = Resistant NR = Not Recommended F = Fair U = Unsatisfactory NT = Not TestedGeneral Notes:The foregoing performance data are intended as guidelines only. Performance suitability for any specific applicationsshould be determined by the user.Variation in temperature, pressure, concentration or mixtures acting synergistically may preclude suggested serviceuse.Material selection is at the sole risk of the user. Consult with a specialist or PSI factory for specific applications.The LineBacker Tackles AsbestosSubstitute ProblemsThe LineBacker seals better thaneither asbestos or asbestos substitutegaskets under most conditions.The LineBacker will maintain it ssealing integrity from hard vacuum topressures in excess of ANSI and APIflange test ratings.The LineBacker Tackles FlangeLeaks and BlowoutsThe flange-to-retainer loading andretainer hoop strength, combinedwith the powerful pressure-energizedfeature of the LineBacker is powerfulenough to prevent sudden catastrophicgasket failure.The LineBacker TacklesInstallation and MaintenanceCostsA positive seal is effected firsttime, every time. Time spent inre-tightening or re-sealing flangesto compensate for gasket materialscold flow is also eliminated.The LineBacker Tackles InventoryCostsThe patented design of theLineBacker permits it to be usedwith ring joint, flat faced or raisedface flanges; or with any combinationof these flanges in a givensize and pressure rating.The LineBacker Tackles FlangeDamageNear zero m and y factorsmake it possible to effect a positiveseal without the tremendousbolt loads that are required withflat gaskets. Choosing retainermaterials compatible with theflange materials will reducepotential corrosion problems.Also, the unique design preventsflange galling that can occur withchevron design gaskets.Page 9

FlangeMate fiSealing GasketsWith a metal retainer,the FlangeMate providessuperior hoop strength and positiveassurance against gasket blowout. In addition,the FlangeMate metal-to-metal contact between flangefaces and the metal retainer makes it impossible to damage thegasket by over-torquing during installation. This also eliminates the need forgauge rings and other devices and methods to assure the correct torque fora positive seal.The FlangeMate gasket concentrates the total compressive load of a flangeface on the sealing elements to produce a seal with a higher sealing load persquare inch than any other gasket. Sealing elements may be made from anycompressible material while retainers may be fabricatedfrom any formable metal.SizesAll standard ANSI and API flange sizes from 1/2 andabove.Custom odd sizes and shapes.Pressure RatingsAll ANSI and API rated flanges.Pressures from hard vacuum to 50,000 psi and higher.MetalRetainerMaterialsAluminumBrassCarpenter 20Carbon SteelClad Steel MaterialsCopperHastelloy BHastelloy CHastelloy XInconel XMonelNickelSoft IronStainless SteelTantalumTinTitaniumVanadiumSealingElementsBuna-N (Nitrile)Buna-SButylEPDMGrafoilHypolonKel-FLeadNatural RubbersNeopreneNylonPolyethylenePolyimidePolypropylenePolyurethaneSilicone RubberSoft CopperTeflon fiVinyl (PVC)Viton fifiDuPontBefore TighteningThe flange faces come into contact withboth the sealing elements and the metalretainer. This initiates the sealingprocess, and results in the highestpossible compressive load on theseals after the flange has been fullytightened.After TighteningThe flange faces have reformed the metal retainerto encapsulate the sealing elements withingrooves which controls the cold flow characteristicsof the sealing material. Thehigh compressive load developed bythe tightened flange is concentratedon the seals. Over-torquing is impossiblebecause of the metal-to-metalcontact between the retainer and theflange faces.Page 10

Custom Sealing GasketsLineBacker TM for clean natural gas.The LineBacker Screened Gasket is manufacturedfor clean natural gas service.It is designed to reduce the possibility ofcontaminates entering meters and othergas handling equipment. Recommendedby rotary meter manufacturers for useupstream of their meters, the LineBackerScreened Gasket can be placed betweenyour flanges without re-engineering or repiping.LinkBackerfi gaskets used inOlympic flame tower.The traditional "lighting of the torch" concluded a twohouropening ceremony celebrating the start of the 2002Winter Olympic Games in Salt Lake City, Utah. While theidentity of the "individual" who would light the flame hadbeen kept a closely guarded secret, the crowd warmlygreeted America’s gold medal winning ice hockey teamfrom 1980 with chants of "U-S-A" as they lit the flame.The Olympic torch, designed and built by Wet Design,included 2-inch and 4-inch diameter 150ANSILineBackerfi gaskets. Chosen for their unmatched sealingreliability, LineBackerfi gaskets were an integral partof a system that fueled an Olympic flame that was toburn brightly throughout the 2002 games.Custom sealing gaskets may be manufacturedfor flanges from 3/8 diameterand up. For added flexibility and toaccommodate a wide variety of flangetypes, sealing elements may be positionedanywhere between the I.D. ofthe bolt circle and I.D. of the gasket.In addition, PSI has designed andinstalled large diameter sealing gasketswith two sealing elements to providemaximum protection and reliability.Custom shaped gaskets may be manufacturedto precise customer specificationsfor sealing mating surfaces ofany configuration.S tandard gaskets for flanges as wellas custom gaskets have been fieldproven in the followingindustries.Wood and PulpProcessing MillsRefineriesChemical PlantsPipeline andDistribution PipingProduction FieldsShipboard InstallationsElectric PowerGeneration PlantsSteel MillsLNG and SNGSystemsPetroleum MarketingFacilitiesPage 11

How to OrderPlease provide the followng information:1. Quantity2. Nominal Pipe Size3. Pressure Rating4. Gasket Type: E or F5. Gasket Style: LineBacker, GasketSeal or FlangeMate6. Retainer Material7. Sealing Element8. Weld neck or slip-on application9. Note all special requirements10. Contact your local distributor or PSIHow to Order Example: Gasket pictured below.1- 3” 150# F LB G-10/Viton Weld NeckISO 9001:2000 Quality AssuranceAll PSI facilities are ISO 9001:2000 certifiedwith extensive quality control procedures ineffect to insure total compliance withproduct performance and reliabilitystandards. In addition, all PSI gaskets areclearly marked with the followinginformation to guarantee that the correctgasket is used for its intended application.• Brand Name• Material Make-up (retainer/seal element)• Pipe Size• Pressure Rating• Date of Manufacture StampWarrantyAll products are warranted against failure caused by manufacturingdefects for a period of one year. Any product found to be sodefective and returned within one year from date of shipment will bereplaced without charge.The above warranty is made in lieu of, and we disclaim, any and allother warranties, expressed or implied, including the warranties of merchantabilityand fitness for a particular purpose, and buyer agrees toaccept the products without any such warranties.We hereby disclaim any obligation or liability for consequential damages,labor costs or any other claims or liabilities of any kind whatsoever.Certificate No. 10125Certificate No. NACB7895Pipeline Seal and Insulator, Inc.6525 Goforth Street, Houston, TX 77021 U.S.A.Tel: 713-747-6948 • 800-423-2410 • Fax: 713-747-6029e-mail: info@psipsi.comwww.pipelineseal.comPSI-SG-305Page 12