1.1所有的風(fēng)管及配件均采用鍍鋅。
1.1 All air ducts and fittings shall be galvanized.
1.2風(fēng)管法蘭采用角鋼，法蘭鉚接必須用鍍鋅鉚釘鉚接。
1.2 The air duct flange is made of angle steel, and the flange riveting must be riveted with galvanized rivets.
1.3風(fēng)管制作采用單咬口或轉(zhuǎn)角咬口，接縫處涂密封膠，法蘭螺釘孔和鉚釘孔的間距不大于100mm，法蘭四角應(yīng)設(shè)螺釘
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普通區(qū)風(fēng)管板材拼接的咬口縫應(yīng)錯(cuò)開，不得有十字型拼接縫;
1.4 The seam of air duct plate splicing in common area shall be staggered and there shall be no cross seam;
1.5矩形風(fēng)管彎頭采用外弧形或內(nèi)弧形，其中弧形彎頭當(dāng)寬邊尺寸大于500mm時(shí)應(yīng)設(shè)導(dǎo)流葉片
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風(fēng)管制作 2.1.1對(duì)于鍍鋅板風(fēng)管的制作，其規(guī)格多、工程量大，為了節(jié)約成本，提高工作效率，不僅要對(duì)圖紙進(jìn)行仔細(xì)的消化，而且在購(gòu)料前還考慮到材料的合理利用，為此，采用定尺購(gòu)料，減少邊角余料。
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,便可進(jìn)行風(fēng)管的成型制作，先將板料在咬口機(jī)上折邊,然后再劃線進(jìn)行折方，后合縫成型。風(fēng)管壁厚小于1.2mm、截面大邊尺寸小于1.5米的，均采用一條合縫，聯(lián)合角咬口。單節(jié)風(fēng)管在上法蘭之前，必須檢查截面尺寸，防止風(fēng)管的扭曲，以及組對(duì)后風(fēng)管的整體扭曲。風(fēng)管法蘭之間的聯(lián)接，對(duì)于鍍鋅板風(fēng)管，采用翻邊鉚接。
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風(fēng)管的翻邊寬度應(yīng)為6~9mm,不允許過聯(lián)接螺栓孔,鉚釘必須用鍍鋅鉚釘，鉚釘間距100~150mm，風(fēng)管法蘭應(yīng)保證平行，且垂直風(fēng)管的軸線，風(fēng)管翻邊應(yīng)平整，有裂縫的地方應(yīng)涂密封膠。
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為避免矩形風(fēng)管變形和減少系統(tǒng)運(yùn)行時(shí)管壁振動(dòng)而產(chǎn)生噪聲需進(jìn)行風(fēng)管加固,.當(dāng)矩形風(fēng)管大邊長(zhǎng)≥630mm時(shí)、保溫風(fēng)管大邊長(zhǎng)≥800mm時(shí)、風(fēng)管長(zhǎng)度大于1250mm時(shí)，均應(yīng)采取加固措施，用扁鋼、角鋼加固，以保證風(fēng)管壁的強(qiáng)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風(fēng)管安裝 2.2.1風(fēng)管吊裝前，其單節(jié)之間的組對(duì)工作尤為重要。組對(duì)前應(yīng)先確定風(fēng)管的組對(duì)場(chǎng)地，一般選在風(fēng)管安裝位置的正下方，以避免組對(duì)好的風(fēng)管來回搬運(yùn)所產(chǎn)生的變形，組對(duì)現(xiàn)場(chǎng)必須打掃干凈。將制作合格的單節(jié)風(fēng)管運(yùn)現(xiàn)場(chǎng)，按編號(hào)順序進(jìn)行組對(duì)，聯(lián)接時(shí)送風(fēng)管所采用的法蘭密封墊選用3~5mm閉口密封海綿橡膠片。
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風(fēng)管安裝前，應(yīng)內(nèi)外雜物，并做好清潔和保護(hù)工作，現(xiàn)場(chǎng)風(fēng)管接口的配置，不得縮小其有效截面。潔凈區(qū)風(fēng)管安裝時(shí)要檢查風(fēng)管潔凈，安裝完成及時(shí)進(jìn)行密封保護(hù)。
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連接法蘭的螺栓應(yīng)均勻擰緊，其螺母宜在同一-側(cè);風(fēng)管接口的連接應(yīng)嚴(yán)密、牢固。風(fēng)管法蘭的墊片材質(zhì)應(yīng)符合系統(tǒng)功能的要求，墊片不應(yīng)凸入管內(nèi)，亦不宜法蘭內(nèi)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柔性短管的安裝，應(yīng)松緊適度，無明顯扭曲;可伸縮性金屬或非金屬軟風(fēng)管的長(zhǎng)度不宜過2m，并不應(yīng)有死彎或塌凹。
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風(fēng)管的連接應(yīng)平直、不扭曲。明裝風(fēng)管水平安裝,水平度的允許偏差為3/1000,總偏差不應(yīng)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風(fēng)管水平安裝，直徑或長(zhǎng)邊尺寸小于等于400mm，則風(fēng)管支吊架的間距不應(yīng)大于4m;大于400mm,不應(yīng)大于3mm;風(fēng)管垂直安裝支架間距不應(yīng)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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