... cost 2. easily installment 3. movable Sandwich panel Two sides of color steel or aluminum with high-density of Phenolic (The ... 1..Focus on researching and manufacturing of various polyurethane color steel panel, widely used in house, freezing house,clean room, ... Center GB8624-1997 standardPhenolic Foam Pre-insulated Ducting Panel Compounded color steel is of high strength, which takes phenolic foam ...