1. 尺寸偏差：通风管道的尺寸偏差可能会导致安装不准确或连接不紧密，影响通风效果。尺寸偏差主要是由于制造工艺、设备精度等方面引起的。

1. Size deviation: The size deviation of ventilation ducts may lead to inaccurate installation or loose connections, affecting the ventilation effect. Dimensional deviation is mainly caused by manufacturing processes, equipment accuracy, and other factors.

2. 焊接质量问题：焊接是通风管道制作中的重要工艺，焊接质量不合格会导致焊缝强度不够、气密性差、易发生裂纹等问题。

2. Welding quality issues: Welding is an important process in the production of ventilation ducts, and unqualified welding quality can lead to insufficient weld strength, poor airtightness, and easy occurrence of cracks.

3. 表面处理不当：通风管道表面处理不当可能导致腐蚀、氧化等问题，影响通风管道的使用寿命和外观质量。

3. Improper surface treatment: Improper surface treatment of ventilation ducts may lead to corrosion, oxidation, and other problems, affecting the service life and appearance quality of ventilation ducts.

4. 连接件失效：通风管道连接件如法兰、螺纹接头等如果选择不当或安装不正确，容易出现松动、渗漏等问题，影响管道的连接牢固性和气密性。

4. Failure of connectors: Improper selection or installation of ventilation duct connectors such as flanges and threaded joints can lead to problems such as looseness and leakage, affecting the firmness and airtightness of the pipeline connection.

5. 材料质量问题：通风管道所使用的材料质量不合格，如镀锌层不均匀、厚度不够、铝合金含杂质等，会影响通风管道的耐腐蚀性能和机械强度。

5. Material quality issue: The materials used for ventilation ducts are of substandard quality, such as uneven galvanized layer, insufficient thickness, aluminum alloy containing impurities, etc., which can affect the corrosion resistance and mechanical strength of the ventilation ducts.

6. 防火性能不达标：通风管道在防火性能方面要求一定的耐火时间和防火等级，如果材料选择不当或防火处理不到位，容易引发火灾隐患。

6. Non compliant fire performance: Ventilation ducts require a certain fire resistance time and fire rating in terms of fire performance. Improper material selection or inadequate fire prevention treatment can easily lead to fire safety hazards.

7. 气密性问题：通风管道的气密性是保证通风效果的重要因素，如果安装过程中存在漏风现象，会导致通风效果下降或无法实现预期效果。

7. Airtightness issue: The airtightness of ventilation ducts is an important factor in ensuring ventilation effectiveness. If there is air leakage during installation, it can lead to a decrease in ventilation effectiveness or the inability to achieve the expected results.

8. 声学性能不佳：通风管道在声学性能方面要求一定的隔声效果，如果材料选择不当或内衬处理不到位，会导致噪音传播影响周围环境。

8. Poor acoustic performance: Ventilation ducts require a certain level of sound insulation effect in terms of acoustic performance. If the material selection is improper or the lining treatment is not in place, it can lead to noise propagation and affect the surrounding environment.