... on researching and manufacturing of various polyurethane color steel panel, widely used in house,freezing house,clean room,garage ... fireproofing,sound and heat insulting .Widely used in wall,fireproof door and other buildings with high resisting requirements,places ... Supervision Center GB8624-1997 standardPhenolic Foam Pre-insulated Ducting Panel Compounded color steel is of high strength, which takes ...