Calcium Silicate Board 650C | Wedge CalSil650LD
Wedge Calcium Silicate Board 650°C grade CalSil650LD is a premium-grade, low-density calcium silicate insulation board designed for high-temperature industrial applications up to 650°C. Engineered for superior thermal efficiency, this rigid board combines low thermal conductivity with excellent mechanical strength, making it ideal for insulation of pipes, boilers, furnaces, and process equipment. Manufactured in compliance with international standards such as ASTM C533, the material is inorganic, non-combustible, and asbestos-free, ensuring high safety and long-term durability in demanding environments . Its low-density structure enables easier handling and installation while maintaining strong structural integrity and resistance to thermal shrinkage.
Calcium Silicate Board 650C Insulation – Technical Specification
| Property | Unit | CalSil650LD 230) | CalSil650LD 230) |
| Bulk Density | kg/m³ | 230 (±10%) | 250 (±10%) |
| Compressive Strength | MPa | ≥0.50 | ≥0.75 |
| Flexural Strength | MPa | ≥0.30 | ≥0.45 |
| Thermal Conductivity | W/m·K | ≤0.060 | ≤0.062 |
| Maximum Service Temperature | °C | 650 | 650 |
| Linear Shrinkage | % | ≤2 | ≤2 |
Thermal Conductivity (W/m·K) of Calcium Silicate Board 650°C
| Temperature | ASTM C533 | Wedge CalSil650LD |
| 50°C | ≤0.060 | ≤0.052 |
| 93°C | ≤0.065 | ≤0.0535 |
| 100°C | — | — |
| 149°C | ≤0.072 | ≤0.054 |
| 200°C | ≤0.079 | ≤0.056 |
| 260°C | ≤0.087 | ≤0.0757 |
| 300°C | — | — |
| 371°C | ≤0.102 | ≤0.0923 |
| 400°C | — | — |
| 500°C | — | ≤0.098 |
| 538°C | ≤0.111 | ≤0.1002 |
Dimensions & Tolerances
| Product Form | Length (mm) | Width (mm) | Thickness (mm) | Inside Diameter (ID) |
| Slab / Board | 100 – 600 | 100 – 300 | 30 – 100 | — |
| Pipe Section | 100 – 600 | 100 – 300 | 30 – 100 | As per requirement |
Dimensional Tolerances:
Length: ±2 mm | Width: ±2 mm | Thickness: ±1.5 mm
Chemical Composition Calcium Silicate Board 650°C
| Component | Content (%) |
| SiO₂ | 37 – 42% |
| CaO | 29 – 34% |
| Al₂O₃ | 10 – 12% |
| MgO | 1.8 – 2.1% |
| Fe₂O₃ | 3 – 4% |
| Na₂O + K₂O | 0.9 – 1.2% |
| Loss on Ignition (mainly H₂O) | 12 – 17% |
Calcium Silicate Board 650°C Key Features
- Low density for easy handling and reduced structural load
- Excellent thermal insulation performance
- High compressive and flexural strength
- Non-combustible and fire-safe material
- Low shrinkage at high temperatures
- Long service life with stable performance
Applications of Calcium Silicate Board 650°C
- Industrial piping insulation
- Boilers and furnaces
- Petrochemical plants
- Power plants
- Equipment and vessel insulation
Safety & Handling Calcium Silicate Board 650°C
- Non-toxic and asbestos-free
- Use protective equipment during cutting/installation
- Store in dry conditions to maintain performance
Standards
- ASTM C533
- GB/T 10699
- JIS A9510
Why Choose Wedge CalSil650LD?
Unlike conventional insulation materials, Wedge CalSil650LD offers a perfect balance of:
- Lower thermal conductivity → better energy savings
- Higher strength → longer durability
- Fire-safe composition → zero risk
- Easy handling → faster installation
Packaging & Delivery
- Standard export packaging
- Bulk & customized orders available
- Pan India & international shipping
Calcium Silicate Board 650°C is is a high-quality, rigid calcium silicate insulation material engineered for demanding industrial applications. Available in both boards (slabs) and pipe sections, it provides superior thermal insulation, structural strength, and long-term durability. Manufactured in compliance with international standards such as ASTM C533, the material is inorganic, non-combustible, and asbestos-free, ensuring high safety and long-term durability in demanding environments . Its low-density structure enables easier handling and installation while maintaining strong structural integrity and resistance to thermal shrinkage.
Wedge CalSil650LD boards are specifically developed to deliver consistent performance, reduced heat loss, and enhanced energy efficiency, making them a reliable solution for modern insulation and fire protection systems.
Calcium Silicate Insulation is a high-performance, rigid thermal insulation material widely used in industrial and commercial applications for effective heat management and fire protection. Designed to operate at temperatures up to 650°C, it offers excellent thermal stability, low thermal conductivity, and superior mechanical strength.
This material is particularly suitable for piping systems, boilers, furnaces, and equipment insulation where durability, moisture resistance, and non-combustibility are critical. Compared to conventional insulation materials, calcium silicate provides enhanced dimensional stability, low shrinkage, and long service life, making it a reliable choice for energy efficiency and safety in demanding environments.
The following specification table highlights the key physical, thermal, and mechanical properties in accordance with ASTM C533.
