Graphite foil TENSOGRAPH®
Product portfolio of Tensograph® graphite foils is aimed to cover whole range of requirements starting from basic industrial needs and up to demanding nuclear or high-temperature applications.
Graphite foil Tensograph® is manufactured from natural graphite flakes by chemical and thermal treatment according to the patented technology of UNICHIMTEK, followed by rolling on automatic lines without use of any binder. In the process of production, continuous non-destructive control of density, thickness and homogeneity of the material along and across the rolling line is performed, which ensures highest quality of Tensograph® foil and subsequent products based on it.
Industrial grades offer highly reliable and feasible solution whereas high spec grades are suitable for оxidising, corrosive and high-temperature conditions as well as nuclear norms.
MAIN FEATURES AND PROPERTIES
-
Compliance to MESC 85/203 and EN 14772 §6.7 (Tensograph® C);
-
High purity: up to 99,9% of carbon content;
-
No corrosion;
-
All grades are sulphur free;
-
No aging effect – suitable for long-term applications;
-
High tensile strength grade (5,0 MPa / 725 psi) for high-volume production
APPLICATIONS
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Production of spiral wound, kammprofile and corrugated gaskets, braided packings and rings for stuffing boxes;
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Power generation, chemical, oil and gas industries;
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Oxidizing and corrosive medias (Tensograph® C);
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Nuclear industry (Tensograph® D).
OPERATING RANGE
Temperature range from -195°C / -319°F up to 450°C / 842°F (in water steam - 650°C / 1202°F).
FORMS OF SUPPLY
Thickness …………………….. 0.38, 0.5, 0.76, 1.0, 1.5 mm / .015, .020, .030, .040, .060”
Width ……………………………1000, 1500 mm / 40, 60”
Length of winding ……….. 30, 50, 60, 90, 100 m / 100, 165, 200, 330’
Density …………………………. 1.0, 0.7, 1.12 g/cc / 62, 44, 70 lb/ft3
AVAILABLE OPTIONS OF GRAPHITE FOIL TENSOGRAPH®
|
Parameter |
Grade B Industrial |
Grade G High-purity |
Grade D Nuclear |
Grade C Anti-oxidation and аnti-corrosion |
Grade T High-purity and oxidation resistant |
Grade 1T Ultra-low losses |
|
Carbon, % |
> 98,0 |
> 99,0 |
> 99,85 |
> 98,0 (99,0*) |
> 99,0 |
> 98,0 |
|
Ash, % |
< 2,0 |
< 1,0 |
< 0,15 |
< 2,0 |
< 1,0 |
< 2,0 |
|
Sulfur, ppm |
< 200 |
< 100 |
< 50 |
< 100 |
< 100 |
< 100 |
|
Chlorine**, ppm |
< 40 |
< 40 |
< 20 |
< 40 |
< 20 |
< 20 |
|
Fluorine**, ppm |
< 20 |
< 10 |
< 10 |
< 10 |
< 10 |
< 10 |
|
Total halogens (Cl+F+Br)** , ppm |
< 200 |
< 100 |
< 50 |
< 200 |
< 100 |
< 100 |
|
Tensile strength, MPa |
> 4,5 (> 700 psi) |
> 4,5 (> 700 psi) |
> 4,0 (> 700 psi) |
> 5,0 (> 725 psi) |
> 5,0 (> 725 psi) |
> 5,0 (> 725 psi) |
|
Compressibility, % |
> 40 |
> 40 |
> 40 |
> 40 |
> 40 |
> 40 |
|
Recoverability, % |
> 10 |
> 10 |
> 8 |
> 10 |
> 10 |
> 10 |
|
Oxidation and corrosion inhibitor |
- |
- |
- |
yes |
yes |
yes |
|
Weight loss (670 °C / 1238 °F), %/h |
< 12 |
< 12 |
- |
< 4 |
< 3 |
< 1 |
|
Compliance to special requirements |
DVGW DIN 3535-6 |
BAM; ASTM F2168 class 2 (B) |
PMUC norms; GS RC PVE 011; BAM; ASTM F2168 class 2 (B) |
MESC 85/203; EN 14772 §6.7; ASTM F2168 class 2 (A); DIN-28091-4 |
MESC 85/203; EN 14772 §6.7; ASTM F2168 class 2 (A); DIN-28091-4 |
MESC 85/203; EN 14772 §6.7; ASTM F2168 class 2 (A); DIN-28091-4 |
* initial carbon content (before inhibitors added)
**leachable
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