... a board or roll product with certain strength. Thermal insulation mineral wool board is a board or roll product with certain ... proof in partition wall and wall curtain, thermal insulation in roof, retaining structure, floor heating system, industrial kiln, oven, large sized ... ≥0.25mm).%≤10.0ASTM C 1335 / BS 2972 SECTION 14Average fiber diameter,µm4-6ASTM C 303BS 2972 Section 3Density tolerance,+10 ...