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Air deliverying duct system--PIP ductis factory pre-fabricated The ALP panels are aluminum/polyurethane sandwich panels composed of an expanded polyurethane rigid foam covered on both sides by an aluminum foil.the air ducts made from ALP panels are tested and certified for fire resistance,noise insulation,high air-pressure ressitance,heat insulation.The ALP ducting system is versatile,strong-structureed,extremely light,easy to install and reassembly. The duct is specially suitable for commercial/industrial applications with hygienic requirements. Key Features of PIP Cellduct System:better aesthetical designunique pre-insulated closed cellslow air resistanceminimum permeabilitylight and safehygienic and environmentally friendlyeasy to cleaneasy to reassemblePanel Technical Specification: Panel Thickness: 20mm Foam Density: 50-55 kg/M3 Aluminum Facing Thickness: 80 micron Thermal Conductivity: 0.02 W/m.k Fire Retardance: B1 Aluminum finishing: EmbossedPIP duct Technical Specification:water absorption: 0.05-0.06%working temperature: -60oC +80oCaging resistance: goodenvironmental friendliness:standard metRemark: More than 2000 sizesare available, customed design is welcome. Kindly suggest your port, so that we can offer you the CIF price