... resistance,shock-proof,low factor of heat conduction and sound insulation.It is widely used in central air condition, ships, petroleum ... /m31) board : Thickness (mm) : 10-30 , Width (mm): 500 or 1000 Length(mm) :10,000 or 20,0002) Pipe : Thickness(mm ... ovr 89 mm ,board would be better choose.2) Thermal insulation material's thickness over 25 mm adoption many layers laps ...