λ = 0.069 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 | 213 | 168 | 137 | 125 | 609 | 60 °C | €215 | 0.79 |
| DN50 | 311 | 236 | 184 | 165 | 1,099 | 67 °C | €421 | 1.54 |
| DN80 | 412 | 303 | 231 | 204 | 1,620 | 71 °C | €642 | 2.35 |
| DN100 | 500 | 362 | 271 | 237 | 2,083 | 74 °C | €840 | 3.07 |
| DN150 | 686 | 484 | 353 | 305 | 3,067 | 77 °C | €1,260 | 4.61 |
| DN200 | 860 | 598 | 429 | 368 | 3,992 | 80 °C | €1,656 | 6.06 |
| DN300 | 1,218 | 831 | 583 | 494 | 5,902 | 82 °C | €2,474 | 9.05 |
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 → 701 W/m² at 50 mm (≈€2,487/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: Silica needle mat / fabric → · temperature class: by temperature →
