Spiral Wound Gaskets - The Flexitallic Group

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USEFUL TECHNICAL DATAASSEMBLY TECHNIQUESGasket Style SelectionEnsure that the correct style of gasket has been selected for the appropriate application.Note:See note at bottom of page 8 for inner ring requirements.All PTFE filled Spiral Wound Gaskets for raised face and flat face flanges should utilize an inner and outer guide ring.When using Style ‘R’ Spiral Wound Gaskets ensure that a compression stop is incorporated into the flange arrangement.Required Gasket CompressionFor optimum sealing performance Flexitallic Spiral Wound Gaskets should be compressed to the following thicknesses:INITIAL GASKET THICKNESS0.0625in (1.6mm)0.100in (2.5mm)0.125in (3.2mm)0.175in (4.5mm)0.250in (6.4mm)0.285in (7.2mm)RECOMMENDED COMPRESSED THICKNESS0.050in/0.055in (1.3/1.4mm)0.075in/0.080in (1.9/2.0mm)0.090in/0.100in (2.3/2.5mm)0.125in/0.135in (3.2/3.4mm)0.180in/0.200in (4.6/5.1mm)0.200in/0.220in (5.1/5.6mm)Spiral Wound Gaskets with internal or external guide ringsi.e. Style CG and CGI, should be fully compressed to theguide ring. This will not damage the gasket or affect thesealing performance, since the rings are provided as acompression limiting stop.FlangesCheck that the flange faces are clean, in good condition and with a turned surface finish within the following range Ra 3.2 to 6.3 micrometres (125 to 250 micro inches).BoltingEnsure that the correct bolting material is utilized to suit the operating conditions, taking into account the limitation of low yield strengthbolts.Ensure that the use of bolt lubrication is employed. For torque tightening methods Flexitallic recommends the use of molybdenum disulphidebolt lubrication or similar nickel based compound. Do not apply any lubricants when using PTFE coated fasteners. Consult with thecoating manufacturers for product specific friction coefficients.Stress Relaxation of Bolt Steels and Alloysat Upper Temperature LimitsThe Importance of Bolt LubricationResidual Stress (% of initial stress retainedafter 1000 hours)100755025B8Carbon SteelB17/660B8MB7B16B80ALoad KN (tons)100 (10)80 (8)60 (6)40 (4)20 (2)Lubricated withmolybdenumdisulphideAs receivedcondition frommanufacturerDry bolt withno lubrication00212 392 572 752 932 1112 1292Temperature °F147227 (20)54 (40) 81 (60) 108 (80) 136 (100) 163 (120)Torque Nm (lbft)Tightening ProceduresControlled tightening procedures should be used when installing spiral wound gaskets. Flexitallicrecommends that the use of hydraulic tensioning equipment be considered where possible for bolt diameters 1-1/4" and above.Please refer to Flexitallic's Design Criteria for futher technical information.32 Y O U R G L O B A L G A S K E T P R O V I D E R
RECOMMENDED TORQUETorque Table for CG Spiral Wound GasketsTABLE22NPS (in.)Class 150 Class 300 Class 400 Class 600Min Torque Max Torque Min Torque Max Torque Min Torque Max Torque Min Torque Max Torque0.5 30 40 30 40 30 40 30 400.75 30 40 60 70 60 70 60 701 30 40 60 70 60 70 60 701.25 30 40 60 70 60 70 60 701.5 30 60 100 120 100 120 100 1202 60 90 60 70 60 70 60 702.5 60 110 100 120 100 120 100 1203 90 120 100 120 100 120 100 1203.5 60 90 100 120 160 190 170 2104 70 120 100 140 160 200 190 2405 100 160 110 160 210 260 280 3606 130 200 110 160 190 240 260 3308 180 200 180 260 310 400 400 51010 170 320 250 290 340 440 500 59012 240 320 360 420 510 640 500 61014 300 490 360 420 500 890 680 80016 310 490 500 590 680 800 800 94018 500 710 500 680 680 810 1100 129020 430 710 500 740 800 940 1100 129024 620 1000 800 1030 1500 1750 2000 2340NPS (in.)Class 900 Class 1500 Class 2500Min Torque Max Torque Min Torque Max Torque Min Torque Max Torque0.5 70 120 70 100 50 1000.75 70 120 70 100 70 1001 110 190 110 160 110 1601.25 110 190 135 170 210 2501.5 170 290 200 250 310 3602 110 190 130 170 220 2502.5 170 290 190 250 300 3603 140 230 265 360 460 5004 255 420 415 5205 360 600 585 8006 300 500 530 6808 485 800 845 1100Not Applicable Use CGI10 505 800 1565 200012 570 85014 630 94016 910 129018 1570 2340Not Applicable Use CGI20 1745 257024 Not Applicable Use CGINotes:Torque Values are in ft.-lbs., and assume Alloy Steel Bolts (A193 B7 w/ 2H Nuts) with oil/graphite lubrication.(Nut factors used on these charts are within .15 to .19)Flexitallic does not generally recommend a bolt stress above 60,000 PSI.Torque values limit minimum and maximum gasket seating stresses based upon pressure class and certain operating conditions.(i.e: maximum pressure ratings forgiven pressure class,not hydrotest pressure), Extreme operating conditions such as high temperature may reduce bolt yield strength. Caution should be used inthese applications. The above torque values are for general use only. For critical or extreme applications (high temperature/pressure) consult with Flexitallic engineering.Flexitallic does not accept responsibility for the misuse of this information.Y O U R G L O B A L G A S K E T P R O V I D E R33
Page 2 and 3: YOUR GLOBAL GASKET PROVIDERFLEXITAL
Page 4 and 5: MANUFACTURING UNITSOwned Manufactur
Page 6 and 7: GASKET IDENTIFICATIONGaskets are co
Page 8 and 9: GASKET SELECTIONWHAT STYLE OF GASKE
Page 10 and 11: STYLE CG & CGI* TO ASME B16.20TO SU
Page 12 and 13: STANDARD INSIDE DIAMETERS OF INNER
Page 14 and 15: STYLE CG & CGI TO ASME B16.20TO SUI
Page 22 and 23: STYLE CG & CGITO SUIT LARGE DIAMETE
Page 24 and 25: STYLE CG & CGI TO BS3381TO SUIT BS1
Page 26 and 27: STYLE CG & CGITO SUIT BS1O FLANGEST
Page 28 and 29: STYLE CG & CGITO SUIT DIN FLANGES P
Page 30 and 31: STYLE RIRFOR USE WTH LARGE MALE & F
Page 32 and 33: STYLE CG-RJ & CGI-RJ SPIRAL WOUND G
Page 36 and 37: RECOMMENDED TORQUETorque Table for
Page 38 and 39: FACING DIMENSIONS FOR ASME B16.5 &
Page 40 and 41: CARRIER RING GASKETSThe carrier rin
Page 42 and 43: SPIRAL WOUND GASKETS FOR BOILER CAP
Page 44 and 45: STYLE T FOR BOILER HANDHOLE AND TUB
Page 46 and 47: MULTI-CLASS SPIRAL WOUND GASKET•
Page 48 and 49: Y O U R G L O B A L G A S K E T P R
Page 50: Flexitallic L.P.6915 Highway 225Dee

Spiral Wound Gaskets - The Flexitallic Group

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