Graphite foil Hexaflex™ is manufactured from natural flakes of graphite through a chemical and thermal process which leaves behind flexible graphite of highest purity without the presence of any binders, sulfur and halogens.
Hexaflex™ foil is further processed by rolling on automatic lines. The process of production is continuous and there are several non-destructive control measures for density, thickness and homogeneity of the material along and across the rolling line – this ensures highest and consistent quality of Hexaflex™ foil and subsequent products based on it.
Hexaflex™ graphite foil is aimed to cover whole range of requirements starting from basic industrial needs and up to demanding high-temperature applications. 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 (Hexaflex™ Σ Sigma);
- 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
- Production of spiral wound, kammprofile and corrugated gaskets, braided packings and rings for stuffing boxes;
- Power generation, chemical, oil and gas industries;
- Oxidizing and corrosive medias (Hexaflex™ Σ Sigma).
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 HEXAFLEX™
| Parameter | Grade Β Beta Industrial | Grade Γ Gamma High-purity | Grade Δ Delta Ultra-high purity | Grade Σ Sigma Anti-oxidation and аnti-corrosion | Grade Θ Theta High-purity and oxidation resistant | Grade 1Θ 1Theta 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 | > 9 | > 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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