This procedure applies to the production, installation and inspection of metal, non-metal and composite ventilation ducts (referred to as air ducts) in industrial and civil buildings.
GB/T 20247 Acoustics.Measurement of sound absorption in a reverberation room
GB/T 2518 Continuously hot-dip zinc and zinc alloy coated steel sheet and strip*, 2019-12-10 Update
GB/T 25516 Acoustics.Laboratory measurement produres for ducted silencers and air.Terminal units loss,flow noise and total pressure loss
GB/T 2624.2 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full Part 2: Orifice plates
GB/T 3198 Aluminium and aluminium alloy foils*, 2020-03-31 Update
GB/T 3280 Cold rolled stainless steel plate, sheet and strip
GB/T 3880.2 Wrought aluminium and aluminium alloy plates,sheets and strips for general engineering.Part 2:Mechanical properties
GB/T 3917.1 Textiles.Tear properties of fabrics.Part 1:Determination of tear force using ballistic pendulum method(Elmendorf)
GB/T 5453 Textiles--Determination of the permeability of fabrics to air
GB/T 702 Hot-rolled steel bars—Dimensions,shape,weight and tolerances*, 2017-09-29 Update