λ = 0.028 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 | 127 | 97 | 78 | 70 | 818 | 43 °C | €352 | 1.29 |
| DN50 | 188 | 137 | 105 | 93 | 1,478 | 47 °C | €654 | 2.39 |
| DN80 | 250 | 177 | 132 | 116 | 2,178 | 50 °C | €976 | 3.57 |
| DN100 | 305 | 212 | 155 | 135 | 2,801 | 51 °C | €1,263 | 4.62 |
| DN150 | 421 | 285 | 202 | 174 | 4,124 | 54 °C | €1,873 | 6.86 |
| DN200 | 529 | 352 | 246 | 209 | 5,369 | 55 °C | €2,447 | 8.96 |
| DN300 | 751 | 491 | 336 | 282 | 7,937 | 57 °C | €3,632 | 13.29 |
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 → 418 W/m² at 50 mm (≈€3,601/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: Microporous (fumed-silica) panels → · temperature class: by temperature →
