Cathodic Insulation Kits: Material Specs
Material Specifications
Flange insulation products are used worldwide for all types of piping and pipeline systems to isolate and prevent the flow of electric currents through a fluid or gas pipe system. A primary benefit is the control of damage caused by "electrolysis" and the danger of static electrical build up and subsequent discharge.
Kit Contents
Each insulation kit contains an isulating gasket, insulating washers, steel washers and sleeves for each bolt or stud. Flange insulation gaskets are made in all sizes, pressure ratings and virtually all suitable materials. The size and shape of each varies depending on the flange type, size and pressure. Gaskets may be purchased in kits or separately. Related sleeves and washers are provided in the kits and available in all sizes and materials.
Flange insulation kits for large diameter flanges, flanges with special bolt hole configurations, or for uses in unique or unusual environments are available by special order.
| Type E and F Gasket Materials |
Temp. Limits |
Dielectric V/mil |
Water Absorption |
| Aramid Fiber (Green Sheet) |
750°F |
300 |
--- |
| RD 940 (Red Devil) |
600°F |
500 |
--- |
| CE Grade Phenolic |
225°F (-100°F) |
400-500 |
1.10% |
| G-10 Epoxy/Glass |
250°F (-200°F) |
500 |
0.02% |
| G-11 Epoxy/Glass |
300°F (-200°F) |
500 |
0.10% |
| XX Grade Phenolic |
175°F (-50°F) |
500 |
0.02% |
| Nitrile Faced Phenolic (Rubber Clad) |
175°F (-40°F) |
500 |
0.02% |
| HTG-3 Phenolic/Glass (600°F Short Time) |
450°F |
600 |
0.15% |
| Garlock Bluegard 3400 |
700°F |
630 |
--- |
| Klinger C-4401 |
750°F |
300 |
--- |
| 25% Glass Filled Teflon |
500°F |
235 |
--- |
| Type D RTJ Gasket Materials |
Temp. Limits |
Dielectric V/mil |
Water Absorption |
| CE Grade Phenolic |
225°F (-100°F) |
500 |
1.10% |
| G-10 Epoxy/Glass |
250°F (-200°F) |
500 |
0.02% |
| HTG-3 Phenolic/Glass (600°F Short Time) |
450°F |
600 |
0.15% |
| 25% Glass Filled Teflon |
500°F |
235 |
--- |
| Sleeve Material |
Temp. Limits |
Dielectric V/mil |
Water Absorption |
| Polythylene |
180°F |
450 |
0.01% |
| Mylar |
350°F |
4000 |
0.22% |
| Phenolic |
250°F (-100°F) |
500 |
1.10% |
| Minlon (Sleeve and Washer) |
300°F |
450 |
0.90% |
| Nomex |
425°F |
690 |
10%/humidity |
| RD 940 (Red Devil) |
600°F |
500 |
--- |
| G-10 Epoxy/Glass |
250°F (-200°F) |
500 |
0.02% |
| PTFE |
Cryo-500°F |
1400 |
--- |
| Washers Material |
Compressive Strength |
Temp. Limits |
Dielectric V/mil |
Water Absorption |
CE Grade Phenolic
|
39000 PSI |
225°F (-100°F) |
400-500 |
1.10% |
| G-10 Epoxy/Glass |
60000 PSI |
250°F (-200°F) |
500 |
0.02% |
| G-11 Epoxy/Glass |
75000 PSI |
300°F (-200°F) |
500 |
0.10% |
| HTG-3 Phenolic/Glass (600°F Short Time) |
60000 PSI |
450°F |
600 |
0.15% |
| Minlon* |
4500 PSI |
300°F |
450 |
0.90% |
| * Minlon washers are not recommended for flange ratings above 150 pounds |
All technical advise and recommendation are rendered by Seller free of charge. While based on data believed to be reliable, seller assumes no responsibility.
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