风管加固内支撑件和管外壁加固件应采用镀锌螺栓连接，螺栓穿过管壁处应进行密封处理。
The inner support and outer wall reinforcement of air duct reinforcement shall be connected by galvanized bolts, and the bolt passing through the pipe wall shall be sealed.
风管成型后，管端为阴、阳榫的管段应水平放置，管端为法兰的管段可以立放。风管应待胶液干燥固化后方可挪动、叠放或安装。风管应存放在防潮、防雨和防风沙的场地。
After the air duct is formed, the pipe section with female and male tenons at the pipe end shall be placed horizontally, and the pipe section with flange at the pipe end can be placed vertically. The air duct shall not be moved, stacked or installed until the glue solution is dry and solidified. The air duct shall be stored in a damp proof, rain proof and sand proof site.
风管漏风量应符合本规程定，采用法兰连接时，其漏风量应满足B级或以上要求；采用非法兰连接时，其漏风量应满足C级或以上要求。
The air leakage rate of air duct shall comply with the regulations. When flange connection is adopted, the air leakage rate shall meet the requirements of Class B or above; When non flange connection is adopted, the air leakage rate shall meet the requirements of Class C or above.
风管吸声降噪性能的测试应符合现行标准《声?混响室吸声测量》GB／T?20247测试方法的规定，吸声系数(降噪系数)应大于或等于0．6。
The test of sound absorption and noise reduction performance of air duct shall comply with the current national standard Measurement of Sound Absorption in Sound Reverberation Room GB/T? According to the 20247 test method, the sound absorption coefficient (noise reduction coefficient) shall be greater than or equal to 0.6.
°直角弯管的制作可采用直管侧面开口、端面封堵的方式或采用45°角裁切风管拼接的方式制作。导流片的制作参照规程第的规定，或采用与本体材料相同的专用件制作，采用专用件制作导流叶片的片距控制在75mm～80mm，合管时一定要保证导流片垂直于板面。
The angle elbow can be made by means of side opening and end sealing of straight pipe or splicing of 45 ° angle cut air duct. The guide vane shall be made in accordance with the provisions of the regulations, or the special parts with the same material as the body shall be used. The distance between the guide vanes made of the special parts shall be controlled within 75mm~80mm. The guide vane must be perpendicular to the plate surface when closing the pipe.
三通与90°直角弯头的制作方法基本相同。
The fabrication method of tee and 90 ° right angle elbow is basically the same.
变径管与直管的制作基本相同，端面边长差值超过80mm的应采用拼接法制作，管长不宜小于600mm。
The fabrication of reducing pipe is basically the same as that of straight pipe. If the difference of end face side length exceeds 80mm, the splicing method shall be used for fabrication, and the pipe length shall not be less than 600mm.
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