... steam pervasion are all lower than those of other board heat preservasion materials and they have the characteristics ... power kw 75 9090 110 110132 Thickness of board mm 20,25,30,40,50,60,75, ... 600,900,1200 Length of board mm 1200,1250,2450,2500 Edge of board SS flat head (SL lap joint, ... ripple title; For making up the heat insulation board in the refrige ration storehouse for cold preservation and ...