λ = 0.093 W/m·K at mean temperature ((800+20)/2 = 410 °C, from the published curve). Pipe losses per metre, four thicknesses, savings vs bare.
| Pipe | 30 mm W/m | 50 mm W/m | 80 mm W/m | 100 mm W/m | BARE W/m | Surface @50 mm | Saving €/m·yr @50 mm | t CO2/m·yr |
|---|---|---|---|---|---|---|---|---|
| DN25 | 371 | 299 | 246 | 225 | 818 | 91 °C | €253 | 0.93 |
| DN50 | 539 | 417 | 330 | 297 | 1,478 | 103 °C | €518 | 1.89 |
| DN80 | 711 | 535 | 413 | 367 | 2,178 | 110 °C | €802 | 2.93 |
| DN100 | 862 | 637 | 483 | 426 | 2,801 | 115 °C | €1,055 | 3.86 |
| DN150 | 1,180 | 851 | 629 | 547 | 4,124 | 121 °C | €1,597 | 5.84 |
| DN200 | 1,477 | 1,050 | 763 | 658 | 5,369 | 125 °C | €2,107 | 7.71 |
| DN300 | 2,087 | 1,456 | 1,036 | 883 | 7,937 | 129 °C | €3,161 | 11.57 |
Assumptions: 20 °C ambient, still air (h=10 W/m²·K combined), €0.05/kWh fuel, 8000 h/yr, 82% efficiency, 0.183 kg CO2e/kWh (DESNZ 2024). Flat surfaces at this duty: bare 7,800 W/m² → 1,223 W/m² at 50 mm (≈€3,208/m²·yr saved). Method: ASTM C680 simplified — methodology. Your exact case: free calculator.
| Material | λ W/m·K | Loss W/m | Surface | Saving €/m·yr | t CO2/m·yr |
|---|---|---|---|---|---|
| Ceramic fibre (RCF / AES blanket) | 0.093 | 637 | 115 °C | €1,055 | 3.9 |
| Microporous (fumed-silica) panels | 0.028 | 212 | 51 °C | €1,263 | 4.6 |
| Silica needle mat / fabric | 0.082 | 567 | 104 °C | €1,090 | 4.0 |
DN100 pipe at 800 °C, 50 mm insulation, per metre of pipe; bare loss 2,801 W/m. λ at mean temperature; € and CO2 per metre·year at €0.05/kWh, 8000 h, 82% efficiency. Method: ASTM C680 simplified (h=10).
Material datasheet: Ceramic fibre (RCF / AES blanket) → · temperature class: by temperature →
