Hot dip galvanized ventilation pipe occupies a key influence in urban construction.
1. Preparation before construction
As the saying goes, "the skill of sharpening a knife does not miss the skill of chopping firewood". Adequate preparation in advance is the prerequisite to ensure the installation quality of air duct. When the purification treatment air duct is prepared for production and manufacturing in advance, whether it is centralized production and manufacturing in the plant or on the spot production and manufacturing, it is necessary to ensure that the closed type is cleaned on the spot and there are standard lighting lamps and lighting lamps. In addition, the produced and processed square steel pipes should be transported carefully to minimize environmental pollution.
2. Selection of pipeline raw materials
The selection of air duct raw materials is also very harmful to the construction quality of air duct. Generally speaking, in order to better ensure the net weight of the air duct, the air duct with smaller thickness must be selected, but the specification and working pressure level of the air duct must be comprehensively considered. From the perspective of design scheme, it should be noted that a system software can match the thickness of several cylinders with different negative pressure levels.
3. Horizontal connection of air duct
风管水准联接有一定的独特性。这类接口方式能够 说成增加风管长短的方式，还具备提高风管弯曲刚度、维持风管水准规格的功效。水准联接一般 是角活套法兰。这类联接在于墙面的薄厚，也在于墙面的联接和加固。
The horizontal connection of air duct has certain uniqueness. This kind of interface mode can be described as a way to increase the length of the air duct, and also has the effect of improving the bending stiffness of the air duct and maintaining the standard specification of the air duct. Horizontal connection is generally angle looper flange. This kind of connection lies not only in the thickness of the wall, but also in the connection and reinforcement of the wall.
4. Longitudinal joint of air duct
风管纵缝方式可依据具体情况挑选。中底压管道中常会选用扣子牙齿咬合联接。针对矩形框管道，没有连接头堵塞的工作压力等级。因而，选用扣子牙齿咬合能够 节约反边工艺流程。现阶段，大部分软管是竖向接缝处。按键用以联接。可选用螺栓、自攻螺丝、焊接、压纹、压印等方式 拧紧立缝和帽型立缝。
The longitudinal joint mode of air duct can be selected according to specific conditions. The middle and bottom pressure pipes are usually connected by the bite of buttons and teeth. For rectangular box pipes, there is no working pressure level with connector blockage. Therefore, the selection of button teeth can save the reverse edge process. At this stage, most hoses are at vertical joints. The key is used to connect. Bolts, self tapping screws, welding, embossing, embossing and other methods can be used to tighten the vertical seam and cap type vertical seam.
5. Air duct storage
The air duct of prefabricated components shall be properly stored to prevent secondary pollution. The branch pipe can be sealed with rubber seals such as plastic film, and then the pipe can be classified and stacked. Pay attention to cleaning the air duct before application to ensure that the surface is corrosion-resistant, and there is no vacuum pump after dryness.