1.1所有的风管及配件均采用镀锌。
1.1 All air ducts and fittings shall be galvanized.
1.2风管法兰采用角钢，法兰铆接必须用镀锌铆钉铆接。
1.2 The air duct flange is made of angle steel, and the flange riveting must be riveted with galvanized rivets.
1.3风管制作采用单咬口或转角咬口，接缝处涂密封胶，法兰螺钉孔和铆钉孔的间距不大于100mm，法兰四角应设螺钉
1.3 The air duct shall be manufactured with single or corner bite, and the joint shall be coated with sealant. The distance between flange screw hole and rivet hole shall not be greater than 100mm. The four corners of the flange shall be equipped with screws
1.4普通区风管板材拼接的咬口缝应错开，不得有十字型拼接缝;
1.4 The seam of air duct plate splicing in common area shall be staggered and there shall be no cross seam;
1.5矩形风管弯头采用外弧形或内弧形，其中弧形弯头当宽边尺寸大于500mm时应设导流叶片
1.5 The rectangular air duct elbow shall be of external or internal arc, and the arc elbow shall be provided with guide vanes when its width is greater than 500mm
2、施工方法 2.1风管制作 2.1.1对于镀锌板风管的制作，其规格多、工程量大，为了节约成本，提高工作效率，不仅要对图纸进行仔细的消化，而且在购料前还考虑到材料的合理利用，为此，采用定尺购料，减少边角余料。
2. Construction method 2.1 Air duct fabrication 2.1.1 For the fabrication of galvanized sheet air duct, there are many specifications and large quantities of work. In order to save costs and improve work efficiency, not only the drawings should be carefully digested, but also the reasonable use of materials should be considered before purchasing materials. For this reason, the materials should be purchased at a fixed length to reduce the leftover materials at the edges and corners.
2.1.2定尺板料完成后,便可进行风管的成型制作，先将板料在咬口机上折边,然后再划线进行折方，后合缝成型。风管壁厚小于1.2mm、截面大边尺寸小于1.5米的，均采用一条合缝，联合角咬口。单节风管在上法兰之前，必须检查截面尺寸，防止风管的扭曲，以及组对后风管的整体扭曲。风管法兰之间的联接，对于镀锌板风管，采用翻边铆接。
2.1.2 After the completion of the fixed-length sheet, the air duct can be formed. First fold the sheet on the seaming machine, then draw a line to fold the square, and then form the joint. If the wall thickness of the air duct is less than 1.2mm and the size of the large side of the section is less than 1.5m, a seam shall be used, and the joint angle seam shall be used. Before the upper flange of a single section of air duct, the section size must be checked to prevent the distortion of the air duct and the overall distortion of the assembled air duct. For the connection between the air duct flanges, the galvanized sheet air duct shall be flanged and riveted.
2.1.3风管的翻边宽度应为6~9mm,不允许过联接螺栓孔,铆钉必须用镀锌铆钉，铆钉间距100~150mm，风管法兰应保证平行，且垂直风管的轴线，风管翻边应平整，有裂缝的地方应涂密封胶。
2.1.3 The flanging width of the air duct shall be 6~9mm, and it is not allowed to pass through the connecting bolt hole. The rivets must be galvanized, with the rivet spacing of 100~150mm. The air duct flange shall be parallel and perpendicular to the axis of the air duct. The air duct flanging shall be flat, and the places with cracks shall be coated with sealant.
2.1.4为避免矩形风管变形和减少系统运行时管壁振动而产生噪声需进行风管加固,.当矩形风管大边长≥630mm时、保温风管大边长≥800mm时、风管长度大于1250mm时，均应采取加固措施，用扁钢、角钢加固，以保证风管壁的强度。
2.1.4 In order to avoid the deformation of rectangular air duct and reduce the noise caused by pipe wall vibration during system operation, the air duct shall be reinforced. When the large side length of rectangular air duct is ≥ 630 mm, the large side length of insulated air duct is ≥ 800 mm, and the length of air duct is greater than 1250 mm, reinforcement measures shall be taken, and flat steel and angle steel shall be used for reinforcement to ensure the strength of air duct wall.
2.2风管安装 2.2.1风管吊装前，其单节之间的组对工作尤为重要。组对前应先确定风管的组对场地，一般选在风管安装位置的正下方，以避免组对好的风管来回搬运所产生的变形，组对现场必须打扫干净。将制作合格的单节风管运现场，按编号顺序进行组对，联接时送风管所采用的法兰密封垫选用3~5mm闭口密封海绵橡胶片。
2.2 Air duct installation 2.2.1 Before the air duct is hoisted, the assembly between its single sections is particularly important. Before assembly, the assembly site of the air duct shall be determined, which is generally selected directly below the installation location of the air duct to avoid the deformation caused by the transportation of the assembled air duct back and forth. The assembly site must be cleaned. The qualified single-section air duct shall be transported to the site and assembled according to the numbering sequence. The flange sealing gasket used for the air supply duct shall be 3~5mm closed seal sponge rubber sheet.
2.2.2风管安装前，应内外杂物，并做好清洁和保护工作，现场风管接口的配置，不得缩小其有效截面。洁净区风管安装时要检查风管洁净，安装完成及时进行密封保护。
2.2.2 Before the installation of the air duct, the sundries inside and outside should be removed, and the cleaning and protection work should be done well. The configuration of the air duct interface on the site should not reduce its effective section. When installing the air duct in the clean area, check that the air duct is clean, and seal and protect it timely after installation.
2.2.3连接法兰的螺栓应均匀拧紧，其螺母宜在同一-侧;风管接口的连接应严密、牢固。风管法兰的垫片材质应符合系统功能的要求，垫片不应凸入管内，亦不宜法兰内外。
2.2.3 The bolts connecting the flange should be tightened evenly, and the nuts should be on the same side; The connection of air duct interface shall be tight and firm. The gasket material of the air duct flange should meet the requirements of the system function. The gasket should not protrude into the pipe, nor should it be inside and outside the flange.
2.2.4柔性短管的安装，应松紧适度，无明显扭曲;可伸缩性金属或非金属软风管的长度不宜过2m，并不应有死弯或塌凹。
2.2.4 The flexible short pipe shall be installed with proper tightness without obvious distortion; The length of flexible flexible metal or non-metallic air duct should not exceed 2m, and there should be no dead bend or collapse.
2.2.5风管的连接应平直、不扭曲。明装风管水平安装,水平度的允许偏差为3/1000,总偏差不应大于20mm。
2.2.5 The connection of air duct shall be straight without distortion. The exposed air duct shall be installed horizontally. The allowable deviation of levelness is 3/1000, and the total deviation shall not be greater than 20mm.
2.2.6风管水平安装，直径或长边尺寸小于等于400mm，则风管支吊架的间距不应大于4m;大于400mm,不应大于3mm;风管垂直安装支架间距不应大于3m.。
2.2.6 When the air duct is installed horizontally and the diameter or long side size is less than or equal to 400mm, the spacing between the air duct supports and hangers shall not be greater than 4m; More than 400mm, not more than 3mm; The spacing between vertical installation supports of air duct shall not be greater than 3 m.
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