λ = 0.092 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 | 274 | 220 | 181 | 166 | 609 | 73 °C | €189 | 0.69 |
| DN50 | 397 | 307 | 243 | 219 | 1,099 | 81 °C | €386 | 1.41 |
| DN80 | 524 | 394 | 304 | 270 | 1,620 | 86 °C | €598 | 2.19 |
| DN100 | 636 | 469 | 356 | 313 | 2,083 | 90 °C | €787 | 2.88 |
| DN150 | 870 | 627 | 463 | 402 | 3,067 | 94 °C | €1,190 | 4.36 |
| DN200 | 1,089 | 773 | 562 | 484 | 3,992 | 97 °C | €1,570 | 5.75 |
| DN300 | 1,539 | 1,073 | 763 | 650 | 5,902 | 101 °C | €2,356 | 8.62 |
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 → 901 W/m² at 50 mm (≈€2,390/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: Expanded perlite → · temperature class: by temperature →
