Glass wool, now rock wool seems to be out of date.
If the long-term working temperature is higher than 200 ℃, glass wool is not suitable. Weinai thermal insulation blanket is a good piping insulation material. Besides, glass wool has better thermal insulation property than rock wool, but poorer temperature resistance.
Glass wool can only be used in about 260℃, but the highest operating temperature of rock wool is about 600℃. It is easy to construct and install, and can be used for many years with good effect of energy conservation, suitable for small storage tanks and cambered surface with small surface curvature radius and equipments with irregular surface. Rock wool has low heat conductivity coefficient, usually used in thermal insulation places at 450℃. Glass wool has lighter unit weight, lower shot content and higher cost performance ratio than rock wool, so it is widely used in insulation of general buildings and low temperature pipes, building air condition piping insulation and wall sound absorption. While rock wool felt is a quality thermal insulation material with low heat conductivity coefficient. Rock wool felt, with excellent insulation property and low price, is widely used in insulation for high temperature heat pipelines or electrical equipments. While glass wool is usually used in insulation places under 200℃。 Suitable for pipes with medium and large diameter. Fiber has strong toughness. That depends on your need.
