ASMEB16.20.Прокладочныйкоэффициент

Gasket Factors "M"and "Y""M"and "Y"data are to be used for flange designsM=(W-A2P)/A Ponly as specified in the ASME Boiler and PressureWhere:W=Total Fastener force(Ib.or N)Vessel Code Division 1,Section VIll,Appendix 2.TheyA2=Inside area of gasket(in.2 or mm2)are not meant to be used as gasket seating stressP=Test pressure (psig or N/mm2)values in actual service.Our bolt torque tables giveA1 Gasket area (in.2 or mm2)that information and should be used as such."Y"-Minimum Design Seating Stress"M"-Maintenance FactorThe minimum compressive stress in pounds perA factor that provides the additional preloadsquare inch (or bar)on the contact area of the gasketneeded in the flange fasteners to maintain the com-that is required to provide a seal at an internal pressurepressive load on a gasket after intemal pressure isof 2 psig (0.14 bar).applied to a joint.Y=WIA1GasketMin.DesignGasket DesignGasket MaterialFactorSeating Stress"M""Y"(psi)Spiral wound metalStainless steel or MONEL3.0010.000non-asbestos filledGarlock CONTROLLEDDENSITY flexible graphite-Stainless steel or MONEL3.007.500filled spiral woundGarlock EDGEStainless steel or MONEL2.005.000Corrugated metal,Soft aluminum2.502.900non-asbestosSoft copper or brass2.753.700orIron or soft steel3.004.500Corrugated metaljacketed,MONELe or 4%-6%chrome3.255.500non-asbestos filledStainless steel3.506.500Soft aluminum2.753.700Soft copper or brass3.004.500Corrugated metalIron or soft steel3.255.500MONELe or 4%-6%chrome3.506.500Stainless steel3.757.600Soft aluminum3.255.500Soft copper or brass3.506.500Flat metal-jacketed,Iron or soft steel3.757.600non-asbestos filled鞋MONEL3.508.0004%-6%chrome3.759.000Stainless steel3.759.000Soft aluminum3.255.500Soft copper or brass3.506.500Grooved metalIron or soft steel3.757.600MONELe or 4%-6%chrome3.759.000Stainless steel4.2510,100Soft aluminum4.008.800Soft copper or brass4.7513.000Solid flat metalIron or soft steel5.5018.000MONEL or 4%-6%chrome6.0021.800Stainless steel6.5026,000Iron or soft steel5.5018.000Ring jointMONELe or 4%-6%chrome6.0021,800Stainless steel6.5026.000This table lists many commonly used gasket materials and contact facings with suggestedMONEL is a registered trademarkdesign values of"Mand that generally have proven satisfactory in actual service whenof Intemational Nickel.using effective gasket seating width B described in the fommula on page 26.The designvalues and other details given in this table are suggested only and are not mandatory.27