It depends on the temperature of pipes. Steam pipes with 300 degrees should choose the thickness of 100mm, which is based on the national standard that pipeline’ skin should keep less than or equal to 50 degrees in temperature. While hot water pipes keep 40 to 50mm in this regard.
If using glass wool, Dn900 pipes must be equipped with insulating layer which is equal to or greater than 100mm. The best working temperature of glass wool does not exceed 300 degrees. Glass wool should keep 0.035 to 0.046 in thermal conductivity. The best working temperature of glass wool does not exceed 300 degrees. It will generate good effect if using aluminum silicate or silicate. Silicate is a closed-cell insulation material with high temperature resistance, so silicate is the most energy-efficient material.
