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The Saint Ferrer® Pipe Flange Gasket 

Gaskets don’t have a pressure rating

Media Compatibility, Temperature Resistance and Design Values


The role of the gaskets is to flow into flange face imperfections. They do not have a pressure rating. The bolt load provides the clamping force to overcome system pressures. That bolt load also properly seats the gasket to close off the leak path; loss of bolt load, open up the leak path. If the gasket deteriorates, open up the leak path. Choose your Saint Ferrer® Pipe Flange Gasket Series by media compatibility. See each Saint Ferrer Series for temperature resistance and optional ASME design values


Ring Style Gasket 


Ring style gaskets are best purposed when mated with paired raised face flanges. Using ring style gaskets with flat face flanges increases the potential for flange rotation and ultimately flange misalignment. Gasket thickness should take into account flange compatibility, surface finish and torque achievement


Full Face Style Gasket


Full face style gaskets are best purposed when mated with paired flat face flanges. Their use with raised face flanges have no injurious impact on assembly or performance. Gasket thickness should take into account flange compatibility, surface finish and torque achievement


Spiral Wound Gasket


The spiral wound gasket has intervening metallic reinforcements that together serve as a means of producing strength to resist compressive and lateral forces tending to cause undesirable conditions. The reinforcements improve general efficiency of the gasket to withstand higher pressures; better than elastomers and compressed elastomer-fiber matrix gaskets. The steel outer ring guide (0.125 in.) centers the spirally wound gasket (0.175 in.) within the bolt hole circle. To mitigate the possibility of flange rotation, gasket buckling, or outer ring guide dishing, limit the assembly bolt load to compress the spiral wound gasket portion only


Flange facing and available compressive load determine gasket thickness where; rougher surfaces and lower available compressive loads require thicker gasket materials. Although the thickness decision is not a settled science, for all practical purposes when suitable for the flange and operating conditions, 0.125 in. thick elastomer and 0.125 in. thick elastomer-fiber compressed matrix gaskets will seat at low bolt loads. Experience has also shown that 0.625 in. thick elastomer-fiber compressed matrix gaskets subject to high compressive bolt loads are desirable for improving joint stiffness

ASME Gasket Group Number and Gasket Design Values

The ASME has assigned each different gasket material constructions, e.g. elastomer, compressed fiber, spiral wound, a specific group number. This group number is helpful when making using ASME rules to make a bolting material and strength decision. Each group number is assigned two gasket design values, m factor and y minimum seating stress. These values are useful when chooses to understand joint behavior or optimize their component decisions by using the ASME’s minimum required bolt load formula


Elastomer Series 


Consistent quality means consistent service


The Saint Ferrer® Elastomer Series contains rubber with fillers lessening the probability of being crushed at high torque values while retaining their consistent chemical and temperature resistance. Saint Ferrer® Elastomer Series gaskets are marked with a style number for identification. Marking is an important consideration since many elastomer materials appear to be identical



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 CNA Series


Design values consistent with ASME


Suitable for water, oil, gas, and steam pressure vessel applications, the consistent fiber and elastomer content of Saint Ferrer® CNA Series gasket materials offer compressive “yield” characteristics similar to ASME gasket design values. The Saint Ferrer® CNA Series is an excellent choice for high or low bolt load assembly conditions where higher bolt loads equates to a tighter, leak free, joint



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 Spiral Wound Series


Use High Strength Bolting


Saint Ferrer ® Spiral Wound gasket have excellent winding density characteristics. This equates to consistent sealing performance for a given assembly bolt load. Coupled with the strain energy of high strength bolting, Saint Ferrer® Spiral Wound gaskets are an excellent choice for blow out resistance as defined by the “leak before break” design criteria


 Fleur® PTFE Series


When applications demand PTFE

Demanding applications deserve the latest in gasket technology. The Saint Ferrer ® Fleur® PTFE Series is dedicated to the latest in PTFE gasket design. This line consist of the legacy sintered PTFE through the latest generations of modified and expanded PTFE – each generation improving on the performance of its predecessor