CONSTRUCTION
Style 2660
flexible graphite sheet is
made from exfoliated graphite flake which is compressed into
foil by a carefully controlled calendering process. In this
process, the expanded flake particles are mechanically locked
together without the use of fibers, binders or other additives.
Sheets of foil are then adhesive bonded and laminated to the
required thickness.
APPLICATION /
SERVICE
Style 2660
flexible graphite sheet
has pressure-temperature sealability capabilities that are far
superior to all asbestos reinforced and non-asbestos reinforced
sheet products. It is resistant to chemical attack by virtually
all organic and inorganic fluids with the exception of
concentrated, highly oxidizing acids.
Gaskets cut from Style 2660 flexible graphite sheet seal with
low to moderate bolt loads and because of very low creep
relaxation, re-torquing is rarely required. Flexible graphite
conforms to irregular flange sealing surfaces and readily flows
into flange irregularities enabling it to seal both smooth and
coarse surface finishes.
|
SERVICE LIMITS |
| Type |
Description |
Value |
| Temperature
Limits: |
Minimum |
-328°F (-200°C) |
| |
Maximum |
|
| |
In air
|
840°F (450°C) |
| |
In steam
|
1200°F (650°C) |
| |
In reducing or inert media
|
5400°F (3000°C) |
| Pressure
Limits: |
|
2000 psi (140 bar) |
|
Typical Properties: |
Compressibility |
45% (Tested under
5000 psi) |
| |
Recovery |
20% (Tested under
5000 psi) |
| |
Creep Relaxation |
5% |
| |
Tensile Strength |
650 psi |
| |
Compressive
Strength |
35, 000 psi |
| |
Density |
62.4 lbs/ft³ |
|
|
Carbon Content |
98%
minimum |
| |
Total sulfur |
1200 ppm maximum |
| |
Leachable
Chlorides |
50 ppm maximum |
| Available
Sheet Sizes: |
Thickness |
1/64", 1/32",
1/16", 1/8" |
| |
Sheet Sizes |
39.4" x 39.4" |
| |
NOTE:
Rolls, 108’ long, are available in 1/64” and 1/32”
thicknesses. |
