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RING TYPEJOINT GASKETS05.07
GLOBAL RESOURCEFLEXITALLIC, A WORLDWIDE ORGANIZATIONLOCAL SERVICECOMMITTED TO MEETING CUSTOMER NEEDSCOMPREHENSIVEPRODUCT RANGEFOR ALL INDUSTRIAL AND PETROCHEMICAL APPLICATIONSLET FLEXITALLIC TAKE THE PRESSURESEALING SOLUTIONSTHE ANSWER IS ALWAYS FLEXITALLIC
ABOUT USThe Flexitallic Group is the international market leader in the manufacture and supplyof high quality, high value sealing products.Based on sales and geographic reach, The Flexitallic Group isthe only true global supplier of industrial gaskets. The companymaintains a major market position in all pressure ranges of staticsealing devices used throughout the world, most notably in theoil and gas industry’s upstream and downstream operations.Our global expertise, combined with local availability, ensuresthat our customers benefit from first class products, togetherwith outstanding customer service and technical support. Weprovide a comprehensive range of semi-metallic gaskets, sheetgasket materials, pump and valve seals and metallic gaskets to awide range of oil and gas, industrial, pulp and paper, andautomotive customers. Specialist markets include refiningpetrochemicals, power generation, food, pharmaceutical,marine, offshore and water treatment markets.Flexitallic is skilled at providing design and development work to help customers buildoptimum solutions. We have created some important product leaders in the sealing industrysuch as Thermiculite, material for high temperature, high pressure applications and Sigma, aPTFE based sheet designed to seal in the harshest chemical environments.With an ongoing investment in hightechnology, we are well-equipped to developinnovative and reliable new products.At all locations, trained technical staffanswer product enquires, solve problems andprovide 24 hour emergency assistanceanywhere in the world.1
ABOUT USWORLDWIDE REPUTATIONFlexitallic has been at the forefront of sealing technology for over 100 years. During this time the company has gained anunrivalled reputation as a global supplier of quality products and services.An ethos of continuous development and improvement of products and services coupled with close attention to localmarket needs, ensures the Company’s status as a worldwide market leader way into the future.RESEARCH AND DEVELOPMENTThe dynamic needs of the market place can only be satisfied by manufacturers who are prepared to invest in research anddevelopment. Flexitallic works continuously to supply industry with the most advanced products and sealing solutions.PRODUCT RANGEThe ability of a product to meet the requirements of a dynamic market place is key to the success of any company.Flexitallic has the ability to supply the world’s industries with an unparalleled range of products and services - “The TotalSealing Solution”.Flexitallic manufactures a full range of metallic static seals, they aremanufactured in types R, oval and octagonal cross-sectional profiles, alongwith RX, BX, SRX and SBX.Flexitallic manufactures a full range of metallic static seals. These areavailable as ring type joint gaskets (page 5), welded membrane gaskets (page15), and weld ring gaskets (page 15).All Flexitallic’s products are manufactured to the highest quality standardsensuring fitness for purpose with the added convenience of the support ofglobal supply.Extensive stocking2
TECHNICAL SUPPORT AND CUSTOMER SERVICEThe company’s command of its technology provides a sound basis fortechnical and commercial customer support. Qualified engineers arealways available for technical audits, advice on specifications ortroubleshooting, while every sales office has a full team of staff to dealwith technical or sales enquires by telephone, fax, or e-mail.The “customer ethic” is central to Flexitallic’s philosophy and this is apart of the global strategy which is apparent in every Flexitallicbusiness throughout the world.PRODUCT SELECTIONIncreasing environmental and economic pressures require that the most suitable product be used in every application. Thisbrochure is intended to aid the process of product selection.If you require more detailed information to ensure compatibility, please consult Flexitallic’s Technical Department whowill be pleased to assist.COMPANY STATEMENTThe ProductsFlexitallic designs and manufactures all its products under a quality system which is accredited to BS EN ISO 9001. Theoperating mission is to produce an unrivalled level of excellence in product specification, performance and availability.The EnvironmentIn the design and manufacture of its products Flexitallic gives full consideration to environmental concerns. By supplyingcost effective and proven sealing products to industry the company contributes not only to greater productivity and reduceddowntime, but also to the control and prevention of fugitive emissions.All products are designed and manufacturedunder stringent quality controls3
QUALITY ASSURED MANUFACTURINGAll Flexitallic Ring Type Joints are manufactured fromfully traceable materials and are supplied to NACEspecifications upon request. Each Ring Type Joint isidentified by low stress stamping with style, ring number,API license number, material reference, ProductSpecification Level (PSL), a unique Flexitallic materialidentification number, and month and year ofmanufacture. Such full and comprehensive traceability,from material source with mill certification to finalsupply, is an essential ingredient in the company’s strictquality assurance procedures and exceeds those demandedby the highest API 6A PSL 4.Low Stress stamping for identificationand traceabilityMATERIALSThe gasket material should be selected to suit the serviceconditions. It is always recommended that the gasketmaterial be softer than the mating flanges. The morepopular Ring Type Joint materials, with the recommendedmaximum hardness and identification as specified in API6A, are shown in the table below.PROTECTIVE COATINGIn accordance with APISpecifications, soft ironand low carbon steel RingType Joints are protectedwith electroplated zinc to amaximum thickness of8μm. Alternative materialcoatings can be suppliedon request.For more highly specialized applications, Ring TypeJoints can be machined from DUPLEX steels and otherexotic materials such as Monel , Inconel , Incoloy , andHastelloy . The Technical Department is available toadvise on other materials.MATERIALUNSNUMBERSoft IronLow Carbon SteelMAXIMUM HARDNESSIDENTIFICATIONBRINELL*ROCKWELL B†9056D12068S4–6% Chrome 1/2% MolyK4254413072F5Type 304 Stainless SteelS3040016083S304Type 316 Stainless SteelS3160016083S316Type 347 Stainless SteelS3470016083S347Type 410 Stainless SteelS4100017086S410Titanium Grade 2R50400Alloy 600N06600200Alloy 625N06625200Alloy 800N08800200Alloy 825N08825160HastelloyN10001200Alloy C276N10276200SMO 254S32154180Zeron 100Super Duplex200S31803* Measured with 3000 Kg load except soft iron which is measured with 500 Kg load† Measured with 100 Kg load and 1/16 inch diameter ball46A-0062
STYLE RThe Ring Type Joint was initially developed forhigh pressure/temperature applications found inthe petroleum industry and is primarily used inthe oil field on drilling and completionequipment. However, today this product rangecan also be found on valves and pipeworkassemblies, along with some high integritypressure vessel joints.Standard Style R Ring Type Joints aremanufactured in accordance with both API 6Aand ASME B16.20 size/ratings. Available inboth oval and octagonal configurations, bothtypes are interchangeable on the modernoctagonal type grooved flanges.Style RAs with all solid metal Ring Type Joints including Style R, it isrecommended to replace the ring when flange connection isbroken.DIMENSIONAL DATA – STYLE ROVALTOLERANCES: (INCHES)A (width of ring) 0.008B, H (height of ring) 0.020P (average pitch diameter of ring) 0.00723 (angle) 1/2 OCTAGONALFlexitallic Style R Ring Type Joints can bemanufactured in accordance with all relevantstandards to suit the following flangedesignations:API 6AASME/ANSI B16.5MSS SP44 (ASME B16.47 SERIES A)BS 15605
STYLE RDimensions in inchesPRESSURE CLASS RATINGSRINGNO.150ANSI, BS & MSS300/60090015002500PITCHAPI (PSI)2000/30005000NOMINAL PIPE SIZE (INCHES)WIDTHDIAMETEROF RINGOF RINGPHEIGHT OF RINGOVALOCTAGONALABHAPPROX.DISTANCE GASKET WEIGHTS, lbs.BETWEENOVALOCTAGONALMADE ��.278.256R171 0†–3–21/221–R21R2211/221/16 51.33.865.975R45*–66––7 515.94.83.483.38135/8* Denotes ring number specified in API 6A.Nominal Pipe Sizes marked** apply to class rating 2000 only.Nominal Pipe Sizes in brackets apply to class rating 3000 only.† Ring no. R30 is suitable for lapped flanges only.6
STYLE RDimensions in inchesPRESSURE CLASS RATINGSRINGNO.150ANSI, BS & MSS300/60090015002500PITCHAPI (PSI)2000/30005000NOMINAL PIPE SIZE (INCHES)WIDTHDIAMETEROF RINGOF RINGPAHEIGHT OF RINGOVALOCTAGONALBHAPPROX.DISTANCE GASKET WEIGHTS, lbs.BETWEENOVALOCTAGONALMADE ��–1022.3534.93–41.3–* Denotes ring number specified in API 6A.Nominal Pipe Sizes marked** apply to class rating 2000 only.Nominal Pipe Sizes in brackets apply to class rating 3000 only.† Ring no. R30 is suitable for lapped flanges only.2.027
STYLE RXThe Style RX is an adaptation of thestandard Style R which energizes onassembly. The RX is designed to fit thesame groove design as a standard StyleR, making the joints interchangeable.Consideration should be given to thedifference in finished make-up distance.The modified design uses an energizingon assembly effect which improves theefficiency of the seal.Style RXDesigns are also available for Subseaapplications.DIMENSIONAL DATA – STYLE RXTOLERANCES: (INCHES)A* (width of ring) 0.008,-0.000H* (height of ring) 0.008,-0.000OD (od of ring) 0.020,-0.00023 (angle) 1/2 *A plus tolerance of 0.008 inches for width‘A’ and height ‘H’ is permitted, provided thevariation in width or height does not exceed0.004 inches throughout its entirecircumference.NOTE 1:The pressure passage hole illustrated in the Ring Type Joint cross section ensuresequalization of pressure which may be trapped in the grooves, it is in rings RX82 throughRX91 only. Center line of hole shall be located at mid point of dimension “c’’ (width of flat).Hole diameter shall be as follows:0.06 inches for rings RX82 through RX85;0.09 inches for rings RX86 and RX87;0.12 inches for rings RX88 through RX91.8
STYLE RXDimensions in inchesPRESSURE CLASS RATING (PSI)NO.200030005000NOMINAL PIPE SIZE (INCHES)PITCHDIAMETEROF RINGPOUTSIDEDIAMETEROF ��–68.2676.208.7319.050.527RX20†––2 1/1668.2676.208.7319.050.527RX232 1/16––82.5593.2711.9125.401.15RX24–2 1/162 1/1695.25105.9711.9125.401.33RX25†––3 1/8101.60109.548.7319.051.422 9/16––101.60111.9211.9125.401.50RX27–2 9/162 9/16107.95118.2711.9125.401.73RX313 1/83 1/8–123.83134.5411.9125.401.91RX26RX35––3 1/8136.53147.2411.9125.402.09RX374 1/164 1/16–149.23159.9411.9125.402.27RX39––4 5.402.96RX457 1/167 1/16–211.14211.9311.9125.403.66RX46––7 3416.6731.755.36RX5713 5/813 10441.7226.9950.806.63RX6516 3/4––469.90480.6211.9125.409.39RX66–16 8441.2811.6322.10RX7321 1/4––584.20596.1113.4931.75RX74–20 �–260.35286.9430.1645.243.31* ��1 3/846.0446.045.7411.30–* RX205†––1 13/1657.1562.315.5611.10–* RX210†––2 9/1688.9097.639.5319.05–* RX215––4 1/16130.18140.8911.9125.40–* RX215†––4 1/16 x 4 1/4130.18140.8911.9125.40* API allows more liberal tolerances on RX 201–215† Denotes API Ring Type Joint gaskets for segmented flanges for dual completions to API Standard 6A.Designs are also available for Subsea applications.9
STYLE BXThe Style BX energized Ring Type Joints,manufactured in accordance with API 6A, aredesigned for use on pressurized systems up to20,000 psi.When correctly fitted, the style BX gasketallows virtual face to face contact of the flangefaces which means that the gasket is fullytrapped on both the inner and outer diameters.All BX gaskets incorporate a pressure balancehole to ensure equalization of pressure whichmay be trapped in the grooves.Style BXDesigns are also available for Subsea applications.DIMENSIONAL DATA – STYLE BXTOLERANCES: (INCHES)A* (width of ring) 0.008,-0.000D (hole size) 0.02H* (height of ring) 0.008,-0.000OD (od of ring) 0.000,-0.00523 (angle) 1/4 One pressure passage hole required per ringon center line *A plus tolerance of 0.008inches for width ‘A’ and height ‘H’ ispermitted, provided the variation in width orheight does not exceed 0.004 inchesthroughout its entire circumference.NOTE 1:Radius of the ring shall be 8% to 12% of the ring height ‘H’.10
STYLE BXDimensions in inchesPRESSURE CLASS RATING NAL PIPE SIZE bs.FOR API 6BX suitablesuitablesuitableforforforfor21161/426 3/4 Nominal Pipe Size 2,000 psi rating.5 3/4 Nominal Pipe Size 10,000 psi rating.26 3/4 Nominal Pipe Size 3,000 psi rating.30 Nominal Pipe Size 2,000 and 3,000 psi ratings.Designs are also available for Subsea applications.11
SPECIALIZED RING TYPE JOINTSRUBBER COATED RING TYPE JOINTSThis is an oval Ring Type Joint totally enclosedin a nitrile rubber coating. The Ring Type Jointmaterial is usually soft iron or low carbon steel.This type of gasket has three main functions: It is used in pressure testing to minimizedamage to flanges. The rubber contact points provide additionalseals while protecting the flange surfaces. It provides increased assurance againstcorrosion, which can occur betweenconventional Ring Type Joints and theengaged surfaces of the groove.A wide range of standard sizes are available,with special sizes available upon request.Rubber Ring JointCUSTOM MANUFACTURED SEALSFlexitallic supplies gaskets, with or withoutinserts, and other specialized machinedmetallic components to suit subsea andwellhead equipment.Section through a Rubber Ring JointBLIND RING TYPE JOINTSSpecial Ring Type Joints can be manufacturedto blank off flanges and pipework. They consistof standard Ring Type Joints with integral solidmetallic centers.Blind Ring Type Joints can be supplied in allstandard materials and exotic alloys.Special BOP Type JointFor further information on the specialized RingType Joint products, please contact Flexitallic’sTechnical Department.For problematic ring type flange applications,the specialized Flexitallic “CG-RJ” SpiralWound gasket design may also be considered.12Section through Blind Ring Type Joint
SPECIALIZED RING TYPE JOINTSFor critical and non-standard applications, Flexitallicoffers a range of specialized Ring Type Joints to suitthe needs of the petrochemical industry.TRANSITION RING TYPE JOINTSThese are combination rings which consist of twodifferent sizes having the same pitch circle diameter.They are used for sealing Ring Type Joint flangeswhere the mating flanges have different ring groovediameters.Transition Ring Type Joints can be manufacturedfrom standard materials, as well as exotic alloys.Transition Ring Type Joints are available with eitheroval or octagonal facings and are not encompassedby the API specification.SUBSEA GASKETSFlexitallic is able to provide safe, dimensionally andfunctionally interchangeable subsea wellhead,mudline and tree equipment within the scope of API.Transition RingThe performance requirement of pressure integrity,thermal integrity, material choice along with noobservable leakage allowable are met with thesesealing desires.To distinguish from topside Ring Type Joints thesuffix “s” is used to indicate the additional pressurepassage hold in the ring cross section. This is toindicate the additional requirement to preventpressure lock when connections are made upunderwater.API SBX RTJOPTION AAPI SRX RTJOPTION BOPTION AOPTION B13
STYLE RXWITH PTFE INSERTSSTYLE RX RING TYPE JOINTS WITH PTFEINSERTSStyle RX Ring Type Joints can also be suppliedwith PTFE inserts, in order to reduce turbulentflow and eliminate gasket/flange erosion. Theinsert is specially designed with radially drilledpressure passage holes so that the self energizingperformance of the RX Ring Joint is notimpaired.As can be seen right, the insert is locatedbetween the inside diameter of the Ring TypeJoint and the bore of the flange. On assembly,the insert is completely trapped between themake up of the flanges, filling the annular spacebetween the flange bore and gasket.14Section through Oval Ring with Insert
WELD RINGSAnother gasket concept, with origins from theGerman industrial market, is welded gaskets. Asstandard, two variants exist, Welded Membranegaskets in accordance with DIN 2695 and WeldRing gaskets.WELDED MEMBRANE GASKETSThe Welded Membrane gasket consists of twosimilar rings each of 0.157 inch thickness. Forchemical compatibility and in order to ensurecontrolled thermal conductivity and weldcompatibility, the gasket material must alwaysbe the same as the flange material. Each ring isindividually welded to it’s mating flange andupon flange assembly, a second weldingoperation ensures the joining of the rings ontheir outer diameter, thus providing a fullywelded joint.4d1d2Single Seal Ringd1105WELDED RING GASKETStd2Style SRd210d115 80 5R1.51.2t30 As with Membrane Welded Gaskets, Weld RingGaskets are utilized in pairs. As standard, eachring is 0.591 inches thick and manufactured tosimilar materials to that of the flange, thusensuring full compatibility. All welding isconducted on the outside of the outside of thegasket and flange, thus ensuring ease oflocation, especially in restricted applicationswhere space is of a minimum. Two styles exist,Style SR and Style SRL.R2R5.53Wire ring serves aswelding aid (sealingof lip space againstpenetration ofcondensate.Style SRL15
LENS RINGSFlexitallic Lens Rings, manufactured inaccordance with DIN 2696, provide theengineer with a high integrity, highpressure/temperature seal for specialapplications.Lens Rings have a spherical surface and aresuitable for use with conical flange faces(other styles are available on request).As standard, the gasket material should besofter than the flange material, thusensuring that the applied compressive loadleads to the elastic/plastic deformation ofthe Lens Ring and not the flange sealingface.Lens ringsd3d2By applying higher loads on the gasket thecontact area between the Lens Ring and theflange increases. This prevents the gasketfrom being overstressed.DN20 SAs with all metallic joints,the re-use of LensRings is not recommended. Duringassembly and use, work hardening of thematerial occurs. With subsequent re-use,increased bolt loads are required to achievesimilar sealing performance. This can leadto damage to the flange faces.16rdd1Cross Section of Lens
FLEXITALLIC PRODUCT RANGESPIRAL WOUNDSIGMAGASKET Biaxially orientated PTFE sheet sealingmaterials Available in a variety ofmaterials for metal windingstrip, filler, and guide ring PTFE sheet materials are available in avariety of forms and levels Style CG, CGI, R, and RIR Long term stress retention benefit Meets ASME B16.20standards High level of chemical resistance Class 150 to 2500 Cryogenic to 500 F (260 C) Conform to FDA Regulations NPS 1/2” to 60”THERMICULITEFLEXPRO GASKET Will not oxidize, even attemperatures higher than1800ºF (580 C)(Kammprofile) Superb level of tightness evenat 930ºF (500 C) Suitable from vacuum to Class 2500and higher Maximum recommendedpressure is 2900 psi Suitable from cryogenics to 2000ºF(1100 C), depending on core and facingmaterials Available in sheets, spiralwound, Flexpro and LSgaskets Precision serrated metallic core withthe additions of soft gasket materialsRTJ GASKETSSHEET MATERIALS Style R gaskets aremanufactured in accordancewith both API 6A and ASMEB16.20 size/ratings Temperature ranges from ambient to800 F (425 C) Manufactured from fullytraceable materials Available in both oval andoctagonal configurations Excellent torque retention Good chemical resistance Wide range of elastomers for chemicalcompatibility Excellent sealability for wide range ofchemicalsHEATFLUOROSEALEXCHANGERS Metal jacketed gaskets 100% PTFE - inert and resistant tochemicals and corrosive environments Corrugated Chemically resistant 1 - 14 pH range Solid metal Withstands high pressures up to 3000psi Metal Reinforced Gasket Other engineered gaskets toseal challenging heat exchangerapplications Wide temperature range from -400 F(-240 C) to 500 F (260 C)17
DISTRIBUTED BYFlexitallic L.P.6915 Highway 225Deer Park, Texas 77536Tel: 1 281-604-2400Fax: 1 281-604-2415Flexitallic Ltd.P.O. Box 3, Marsh Works, Dewsbury RoadCleckheaton, West Yorkshire, BD19 5BT, EnglandTel: 44 1274 851273Fax: 44 1274 851386http: //www.flexitallic.com05/07Members of The Flexitallic Group
Flexitallic manufactures a full range of metallic static seals. These are available as ring type joint gaskets (page 5), welded membrane gaskets (page 15), and weld ring gaskets (page 15). All Flexitallic's products are manufactured to the highest quality standards ensuring fitness for purpose with the added convenience of the support of .
