风管外观质量应到达折角平直，圆弧平均，两端面平行，无翘角，外表凹凸不大于10mm；风管外边长的允许偏向；当小于或等于300mm时，为2mm；当大于300mm时，为3mm。管口平面度的允许偏向为2mm，对角线长度之差不应大于3mm；风管与法兰衔接结实，翻边平整，宽度在6-9mm并紧贴法兰。
The appearance quality of the air duct shall be straight, the arc is average, the two ends are parallel, there is no warping angle, and the concave and convex surface is not more than 10 mm; the allowable deviation of the outer length of the air duct is 2 mm when it is less than or equal to 300 mm, and 3 mm when it is more than 300 mm. The allowable deviation of nozzle flatness is 2mm, and the difference of diagonal length shall not be greater than 3mm; the connection between air duct and flange shall be firm, the flanging shall be smooth, and the width shall be 6-9mm and close to the flange.
风管加工使用的金属板材应符合下列规定：
The sheet metal used for air duct processing shall meet the following requirements:
1、普通钢板的表面应平整光滑,厚度应均匀，不得有裂纹结疤等缺陷，其材质应符合现行标准的规定。
1. The surface of ordinary steel plate shall be flat and smooth, the thickness shall be uniform, and there shall be no crack, scar and other defects. Its material shall comply with the current national standards.
2、镀锌钢板(带)宜选用机械咬合类，镀锌层为100号以上的材料，其材质应符合现行标准的规定。
2. The galvanized steel sheet (strip) should be of mechanical bite type, and the galvanized layer should be more than 100, and its material should meet the current national standards.
山东通风管道加工
Shandong ventilation pipe processing
3、不锈钢板应采用奥氏体不锈钢材料，其表面不得有明显的划痕、刮伤、斑痕和凹穴等缺陷，风管加工材质应符合现行标准的规定。
3. The stainless steel plate shall be made of austenitic stainless steel, and its surface shall be free of obvious scratch, scratch, spot, dent and other defects. The material of air duct processing shall comply with the current national standards.
4、铝板应采用纯铝板或防锈铝合金板，其表面不得有明显的划痕、刮伤、斑痕和凹穴等缺陷，材质应符合现行标准的规定。
4. The aluminum plate shall be pure aluminum plate or antirust aluminum alloy plate, and its surface shall be free from obvious scratch, scratch, spot, cavity and other defects. The material shall comply with the current national standards.
(1)济南风管加工应在建筑物围护构造施工完成，以及场所清算完成后停止风管的装置。
(1) Jinan air duct processing should be completed in the building envelope construction, and after the completion of the site clearing, stop the installation of air duct.
(2)装置风管前，应对风管的位置，标高以及走向等停止复核，要契合设计请求，预留孔的位置应正确，孔洞的大小应大于风管外边尺寸的100mm及以上。
(2) Before installing the air duct, the position, elevation and direction of the air duct shall be rechecked to meet the design requirements. The position of the reserved hole shall be correct, and the size of the hole shall be greater than 100 mm or more of the outer size of the air duct.
(3)风管搬运时应避免发作碰撞或摔打，以免损伤风管。装置前应清算掉粉尘以及杂物，装置过程中如有停顿，应封锁风管口，以防有灰尘及异物进入风管。
(3) When handling the air duct, avoid collision or falling to avoid damaging the air duct. Dust and sundries shall be cleared before installation. If there is a pause in the process of installation, the air duct orifice shall be blocked to prevent dust and foreign matters from entering the air duct.
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