Problems needing attention in the process of air duct processing

　　風管不得采用S型插條、C型直角插條及立聯合角插條的連接方式。空氣潔凈等級為1～5級的風管不得采用按扣式咬口。

　　Air ducts shall not be connected by S-type, C-type right-angle and vertical joint-angle inserts. No button bite shall be used for air ducts with air cleanliness grades of 1-5.

　　凈化空調系統風管的法蘭鉚釘間距應小于100 mm，空氣潔凈等級為1～5的風管法蘭鉚釘間距應小于65mm。

　　The flange rivet spacing of air duct in purified air conditioning system should be less than 100 mm, and that of air duct flange rivet spacing of air cleanliness grade 1-5 should be less than 65 mm.

　　風管內不得設置加固框或加固筋。

　　Reinforcement frames or reinforcement bars shall not be installed in air ducts.

　　風管加工前應采用清洗液去除板材表面油污及積塵，清洗液應采用對板材表面無損害、干燥后不產生粉塵，且對人體無危害的中性清潔劑。

　　Before air duct processing, cleaning fluid should be used to remove oil and dust on the surface of sheet metal. Cleaning fluid should be neutral detergent which is harmless to the surface of sheet metal, does not produce dust after drying, and does not harm to human body.

　　通風管道制作完畢應使用清洗液清洗，清洗后經白綢布擦拭檢查達到要求后，酚醛板，應及時封口。

　　Ventilation pipes should be cleaned with cleaning fluid after production. After cleaning, the phenolic board should be sealed in time after the requirements are met by the white silk cloth wiping inspection.

　　彩色涂層鋼板風管的內壁應光滑;板材加工時不得損壞涂層，被損壞的部位應涂環氧樹脂。

　　The inner wall of the air duct of the color coated steel plate shall be smooth; the coatings shall not be damaged during the processing of the plate, and the damaged parts shall be coated with epoxy resin.

　　風管的咬口縫、鉚接縫以及法蘭翻邊四角縫隙處，應按設計及潔凈等級要求，采用涂密封膠或其他密封措施堵嚴。密封材料宜采用異丁基橡膠、氯丁橡膠、變性硅膠等為基材的材料。風管板材連接縫的密封面應設在風管壁的正壓側。

　　The bite seam, rivet seam and flange flange flange flange corner seam should be sealed with sealant or other sealing measures according to the requirements of design and cleanliness grade. Isobutyl rubber, chloroprene rubber and modified silica gel are suitable for sealing materials. The sealing surface of the connecting joint of the air pipe sheet should be located at the positive pressure side of the air pipe wall.

　　風管制作場所應相對封閉，制作場地宜鋪設不易產生灰塵的軟性材料

　　Ventilation control workplaces should be relatively closed, and production sites should be laid with soft materials which are not easy to produce dust.

　　風管應減少縱向接縫，玻璃鋼通風管道，且不得有橫向接縫。

　　The air duct should reduce the longitudinal joints and the FRP ventilation duct, and there should be no transverse joints.

　　風管加工連接螺栓、螺母、墊圈和鉚釘應采用鍍鋅或其他防腐措施，不得使用抽芯鉚釘。

　　Galvanizing or other anti-corrosion measures shall be adopted for connecting bolts, nuts, washers and rivets in air duct processing, and core-pulling rivets shall not be used.