General ventilation engineering and air conditioning engineering are inseparable from the opening of the air duct, and there are many strict requirements for the anticorrosion or color of the project, which requires anti-corrosion coating or paint. Precautions for painting of ventilation duct system are as follows:

1.所运用的油漆号有必要符合设计要求或施工质量查验标准，并具有产品出厂合格证。油漆有有用运用时刻的约束，有必要在有用期内运用，如已超过规则时刻，应送技能查验部分鉴定，承认合格后方可运用。假如因为贮存保管欠好，即便在有用期内，但有显着的蜕变，也不能运用。

1. The paint number used must meet the design requirements or construction quality inspection standards, and have the product factory certificate. It is necessary to use the paint within the useful period. If it has exceeded the regular time, it should be sent to the skill inspection part for identification, and it can be used only after it is recognized as qualified. If because the storage is not good, even in the useful period, but there is a significant transformation, also can not be used.

2.涂装前，检查管道或设备的外表处理是否符合要求。河南通风管道或设备的外表在油漆前有必要彻底干燥。

2. Before coating, check whether the surface treatment of pipeline or equipment meets the requirements. It is necessary to dry the surface of ventilation pipes or equipment thoroughly before painting.

3.涂刷油漆的环境湿度不能过低或相对湿度不能过高，不然会使油漆蒸发时刻过长，影响防腐性能。涂刷油漆时，有必要掌握环境条件，一般要求环境湿度不能低于5摄氏度，湿度要低于85%。

3. The environmental humidity of painting should not be too low or the relative humidity should not be too high, otherwise the evaporation time of the paint will be too long, which will affect the anti-corrosion performance. When painting, it is necessary to master the environmental conditions. Generally, the ambient humidity should not be lower than 5 ℃, and the humidity should be lower than 85%.

4.为了确保涂膜厚度均匀，涂膜后无渗漏、起泡、底部起泡等现象，涂膜稠度不能太大，也不能太小。稠度过大不只糟蹋涂料，而且还会产生掉落、卷取等现象;稠度过小则会产生漏涂、起泡、底部起泡等现象。

4. In order to ensure that the thickness of the film is uniform and there is no leakage, blistering and foaming at the bottom after coating, the consistency of the film should not be too large or too small. If the thickness is too large, it will not only spoil the coating, but also cause the phenomenon of falling and coiling; if the thickness is too small, the coating will be missed, bubbling and foaming at the bottom.

5.为使漆膜与漆膜之间结实，涂刷2遍防锈时，有必要比及防锈漆彻底枯燥后进行，不然会产生漆层掉落现象。

5. In order to make the paint film and the paint film firm, it is necessary to compare with the first antirust paint completely dry before painting twice, otherwise the paint layer will drop.

6.钢板风管的防腐作业一般选用出产前和出产后两种方式。风前的出产管提前钢板涂上防锈底漆,其长处是质量的涂料刷,不漏涂现象,延伸风管道的运用寿命,和之后的资料不会在短时刻内生锈,能够收回,出产后的风管漆刷油漆。在制造风管的过程中，钢板有必要先在咬口处涂上防锈底漆。

6. The anticorrosion operation of steel plate air duct generally adopts two ways: before production and after production. Before the wind, the production pipe should be coated with antirust primer in advance. Its advantage is that the quality of the paint brush does not miss the coating phenomenon. It can extend the service life of the air duct, and the subsequent data will not rust in a short time, so it can be recovered. The air duct paint after production is painted. In the process of manufacturing air duct, it is necessary to apply anti rust primer on the bite of steel plate.

7.管法兰或角钢加固后,应涂上防锈底漆之前与许昌通风管道安装,安装后,不得涂上防锈底漆,不然,法兰或角钢加固和管的触摸外表将防锈底漆覆盖,导致腐蚀。

7. After the reinforcement of pipe flange or angle steel, it should be installed with Xuchang ventilation pipeline before applying anti rust primer. After installation, it is not allowed to apply anti rust primer, otherwise, the reinforcement of flange or angle steel and the touch surface of pipe will cover the anti rust primer, which will lead to corrosion.

8.出风口和风阀的叶片和本体在安装前应根据工艺条件涂防锈底漆，避免呈现漏涂现象。如安装涂刷防腐底漆，形成部分位置渗漏，并产生锈蚀。

8. Before installation, the blade and body of air outlet and air valve should be coated with anti rust primer according to the process conditions to avoid coating leakage. If the installation is coated with anti-corrosion primer, the leakage of some positions will be formed and corrosion will occur.

9.管道支架、吊车、支架的防腐作业有必要在预制完成后进行。管道应避免被吊到支架上，然后油漆，这将使支架的部分，起重机，支架和管道触摸泄漏涂层。

9. It is necessary to carry out anti-corrosion work of pipe support, crane and support after prefabrication. Piping should be avoided from being lifted onto supports and then painted, which will allow the support sections, cranes, supports and piping to touch the leaking coating.

10.运用的各类油漆应了解其物理化学性质，并按技能条件操作，以避免事端的发作。

10. The physical and chemical properties of all kinds of paints used should be understood, and the operation should be carried out according to the technical safety conditions, so as to avoid the occurrence of incidents.