Soft Graphite Felt vs Rigid Graphite Felt
Soft graphite felt and rigid graphite felt are both carbon insulation materials, but they serve different installation needs.
Main Difference
Soft graphite felt is flexible and useful for lining, wrapping and layered insulation. Rigid graphite felt is self-supporting and better suited to boards, cylinders and formed insulation structures. In some hot-zone designs the two forms are used together for different functions.
Selection Factors
The choice should consider furnace geometry, atmosphere, required thickness, handling method and purity requirement. If the insulation must hold shape during installation or service, rigid felt may be the better starting point. Soft felt may be easier where a curved surface, joint or compressible layer needs to be covered.
Technical Data
The soft felt page includes RG-SP, RG-HP, RG-SV and RG-HV data. The rigid felt section separates long fiber and short fiber specification tables.
Practical Buying Checklist
- Identify flexible lining areas and self-supporting sections.
- Confirm required thickness and available installation space.
- Review atmosphere, purity and contamination requirements.
- Provide hot-zone drawings when several insulation forms are combined.
What to Discuss With a Supplier
Do not choose only by product name or thickness. Share the furnace geometry, working atmosphere, installation method and whether the material must support itself so the supplier can review the correct form and grade.
Verify Before a Volume Order
Compare samples for dimensional fit, edge condition and handling before changing a hot-zone design. The final order should state material type, grade, thickness, size, quantity and agreed inspection requirements.
