Neoprene Faced Phenolic Gaskets 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.).
Application of Neoprene Faced Phenolic Gaskets
-
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
|
|