λ = 0.026 W/m·K at mean temperature ((600+20)/2 = 310 °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 | 88 | 67 | 54 | 49 | 609 | 36 °C | €264 | 0.97 |
| DN50 | 130 | 94 | 72 | 64 | 1,099 | 39 °C | €490 | 1.79 |
| DN80 | 173 | 122 | 91 | 80 | 1,620 | 41 °C | €731 | 2.67 |
| DN100 | 211 | 146 | 107 | 93 | 2,083 | 42 °C | €945 | 3.46 |
| DN150 | 291 | 197 | 140 | 120 | 3,067 | 43 °C | €1,400 | 5.12 |
| DN200 | 366 | 243 | 170 | 144 | 3,992 | 44 °C | €1,829 | 6.69 |
| DN300 | 520 | 339 | 232 | 195 | 5,902 | 45 °C | €2,713 | 9.93 |
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 5,800 W/m² → 289 W/m² at 50 mm (≈€2,688/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 |
|---|---|---|---|---|---|
| Stone wool (mineral wool) | 0.092 | 470 | 90 °C | €787 | 2.9 |
| Ceramic fibre (RCF / AES blanket) | 0.076 | 398 | 79 °C | €822 | 3.0 |
| Aerogel blanket | 0.043 | 236 | 55 °C | €901 | 3.3 |
| Calcium silicate | 0.090 | 463 | 89 °C | €790 | 2.9 |
| Expanded perlite | 0.092 | 469 | 90 °C | €787 | 2.9 |
| Microporous (fumed-silica) panels | 0.026 | 146 | 42 °C | €945 | 3.5 |
| Silica needle mat / fabric | 0.069 | 362 | 74 °C | €840 | 3.1 |
DN100 pipe at 600 °C, 50 mm insulation, per metre of pipe; bare loss 2,083 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: Microporous (fumed-silica) panels → · temperature class: by temperature →
