Flexible Graphite Sheet is an excellent sealing material for high temperature, high-pressure transfer of liquids, gases, steam, chemicals and corrosives. It is manufactured from high purity, high crystalline natural graphite flakes, which are processed into continuous foil by a special acid and thermal treatment to produce expanded graphite crystals. The expanded graphite crystals are then formed into foil through an extensive calendaring process without any resins and binders.
| PROPERTY | UNIT | Grade AA | Grade A | Grade B | Grade C |
| Carbon(minimum) | % | 99.5 | 99 | 99 | 98 |
| Ash(maximum) | % | 0.5 | 1.0 | 1.0 | 2.0 |
| Density | g/cc | 0.7 ?C 1.2 | 0.7 ?C 1.2 | 0.7 ?C 1.2 | 0.7 ?C 1.2 |
| Tensile Strength | MPa | 5.2 | 4.5 | 4.5 | 4.0 |
| Chloride | ppm | ??35 | ??40 | ??45 | ??50 |
| Sulphur | ppm | ??500 | ??1000 | ??1200 | ??1500 |
| Compressibility | % | >40 | >40 | >40 | >40 |
| Recovery | % | >15 | >15 | >15 | >15 |
| Compatible pH Range | pH | 0 ?C 14 | 0 ?C 14 | 0 ?C 14 | 0 ?C 14 |
| Application Temperature(Minimum) | Deg. C/(Deg.F) | -200/(-328) | -200/(-328) | -200/(-328) | -200 /(-328) |
| Application Temperature (Maximum) | |||||
| In Air | Deg. C/(Deg.F) | 450/(842) | 450/(842) | 450/(842) | 450 /( 842 ) |
| In Steam | Deg. C/(Deg.F) | 700/(1292) | 700/(1292) | 700/(1292) | 700/(1292) |
| In reducing environment | Deg.C/(Deg.F) | 3000/(5432) | 3000/(5432) | 3000/(5432) | 3000/(5432) |
| Width | mm | 3~1500 | 3~1500 | 3~1500 | 3~1500 |
| Thickness | mm | 0.15~5.0 | 0.15~5.0 | 0.15~5.0 | 0.15~5.0 |
| Length | m | 0~300(Rolls); 0~2(sheets) | 0~300(Rolls); 0~2(sheets) | 0~300(Rolls); 0~2(sheets) |
