Insulation Gasket Kits


Flanges, the most common trouble area, need to be sealed properly to prevent leakage and must also be cathodically isolated to prevent stray currents which cause undo corrosion and eventual breakdown of the metal. Insulation gasket kits help to solve most flange sealing problems, therefore preventing subsequent corrosion and saving the integrity of the pipeline.

Type D gaskets are specifically designed to fit into the ring groove of ring-type-joint flanges. They are manufactured of a medium weave, fabric-reinforced phenolic material and are sized to ANSI specifications available in basic oval as well as octagonal shape. Also available are BX gaskets with pressure ratings to 15,000 PSI.

Type E is a full-faced gasket with the same outside diameter as the flange and precision cut bolt holes. This design facilitates proper alignment of the gasket during installation and foreign material prevented from shorting the flange isolation. Type E gaskets are available in plain face or Nitrile faced phenolic, as well as a variety of high temperature materials. Standard thickness of 1/8″.

Type F gaskets are made to fit the raised face portion of the flange only. As there are no bolt holes in the F gasket, the inside diameter of the bolt hole circle is slightly smaller than the outside diameter of the gasket, assuring an exact, automatic positioning of the gasket. Type F gaskets are available in the same materials as the type E gasket. Standard thickness of 1/8″.


One-Piece Sleeve and Washer Set
One – one-piece isolating sleeve
Two – ⅛” Steel or Stainless Washers

Double Washer and Full Length Sleeve Set
One – Full Length Sleeve
Two – ⅛ ” Steel or Stainless Steel Washers
Two – ⅛ ” Isolating Washers

Type “E” Full Face Isolating Gasket

Type “F” &qot;Raised Face” Isolating Gasket

Type “D” Ring Type Joint Gasket

Type “O-Ring Seal” Isolating Gasket


Flange Insulation Kit Material Specifications
Dielectric Strength Max. Temp. Water Absorption
Gaskets: Neoprene faced Phenolic 500 175 F 0.45%
Plain Phenolic 500 225 F 1.10%
Garlock 3400 630 700 F
Klinger C4401 300 750 F
Insul-Seal 500 175 F 0.50%
JM940 Red Devil 2400 700 F
Phenolic RTJ Type D 500 225 F 1.00%
Nema G10 UL94VO FR 0.01%
Teflon 600 450 F 0.01%
Sleeves Phenolic 500 250 F 2.00%
Mylar 4000 350 F 0.22%
NEMA G10 UL94VO FR 0.01%
Minlon 450 300 F 0.90%
Washers Phenolic 500 225 F 1.10%
Non-Asb 300 750 F
NEMA G11 UL94VO FR 0.01%
Teflon 600 450 F 0.01%


Color :
Type :
Size :