Neoprene Faced PhenolicGaskets have been used as standard ''flat'' isolating gaskets in the oil and gas industries for many years. Soft neoprene rubber sheets are factory applied to both sides of a laminated phenolic retainer providing an effective sealing surface. The temperature limit of these gaskets is approximately +175o F. (+80o C.).

• To limit the extent and cost of cathodic protection current to only those pipes that need to be protected from the main cathodic protection system
• To electrically "split up" long pipelines into distinctive cathodic protection systems
• To isolate a pipeline to ensure that cathodic protection or stray electricity currents do not cause increased corrosion, or cause a hazard
• To isolate piping systems where dissimilar metals are present
• To eliminate static loading charge transfer in discharge or loading operations at oil storage terminals
  
  Gasket Type:
  Type E (Full Face Gasket)
  This gasket kit provides complete protection of both flange faces. The gasket has same outside diameter of flanges. This feature will prevent collection of foreign matter between the flange faces to ensure complete cathodic isolation.
  Type F (Ring Gasket)

  This gasket is manufactured to fit only the raised face surface of the flanges. Outside diameter of the gasket is designed to be slightly less than the inside diameter of the bolt circle. It is recommended that the flanges be wrapped to prevent foreign material from "shorting out" the flanges.

   

  Performance of Neoprene Coated Phenolic Gaskets

  Material	Dielectric Strength	Water Absorption	Compressive Strength	Maximum Temperature
  Plain Faced Phenolic	500Volts/Mil	1.6%	25,000psi	-54 to +104 oC
  Neoprene Faced Phenolic	500Volts/Mil	1.6%	25,000psi	-54 to +79 oC