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(Annex 7) duct design code
Time: 2017-12-26
3.2. Design Rules for Ducts 3.2.1. Design Basis Design Code for Heating Ventilation and Air Conditioning - GB50019-2003 "Code for Fire Protection of Building Design" - GB50016--2006 Scope of application: This section is applicable to the wind of swimming pool space Tube design.
3.2.2. Air duct design General provisions 3.2.2.1. Ventilation, air conditioning system duct, should adopt a circular or long, short side ratio of not more than 4 rectangular cross-section, the maximum length of short side ratio should not exceed 10.
Duct cross-sectional dimensions, should be the current national "ventilation and air conditioning construction quality acceptance norms" (GB 50243) in the provisions of the implementation.
Metal duct diameter should be outside diameter or outside length, non-metallic duct diameter should be inside diameter or length.
3.2.2.2 The thickness of the board in the air duct system shall not be less than the thickness of the steel sheet or galvanized steel sheet as specified in Table 3.2.2.2-1; the thickness of the stainless steel sheet shall not be less than the thickness specified in Table 3.2.2.2-2.
Table 3.2.2.2-1 Thickness of Steel Duct Material Thickness Type Duct Diameter (D) or Long Edge Dimension (d) Round Duct Rectangular Duct D (d)
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