Type D flange insulation gasket kits are used for controlling losses due to corrosion.Type D flange insulation gasket kits can be used to control stray electric currents in piping at oil, gas, water, refinery, and chemical plants, to increase the effectiveness of cathodic protection systems.
Sealing Gasket Physical Properties
|
Property
|
Plain
Phenolic |
Silicone
Glass G-7* |
Epoxy
Glass G-10 |
Epoxy
Glass G-11 |
Dielectric strengths,
Volts/mil |
500
|
350-400
|
550
|
550
|
Compressive strength,
psi |
25,000
|
40,000
|
50,000
|
50,000+
|
Water absorption, %
|
1.6
|
0.07
|
0.10
|
0.10
|
Insulating Resistance,
Meg Ohms |
40,000
|
2,500
|
200,000
|
200,000
|
Flexural strength, psi
|
22,500
|
27,000
|
45,000
|
43,000
|
Operating temp, ºF
|
-65 to +220
|
-292 to +450
|
-292 to +280
|
-292 to +350
|
Operating temp, ºC
|
-54 to +104
|
-180 to +232
|
-180 to +138
|
-180 to +177
|
* = G-7 material should not be used with hydrocarbons, not even trace amounts.
|