通風管安裝工程中風管的加固和防火做法

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風管是整個工程的“呼吸道”，風管系統(tǒng)在安裝時關重要，不僅決定了系統(tǒng)安裝后的美觀度更重要的是決定了系統(tǒng)的功能性，因此控制風管安裝的質量關重要。

Air duct is the "respiratory tract" of the whole project. Air duct system is very important during installation, which not only determines the aesthetics of the system after installation, but also determines the functionality of the system. Therefore, it is very important to control the quality of air duct installation.

風管安裝時應嚴格按照圖紙施工，正式施工前應做好進度策劃并提前制定好施工方案，對操作工人及時做好技術交底。

During the installation of air duct, the construction shall be carried out in strict accordance with the drawings. Before the formal construction, the progress planning shall be made and the construction scheme shall be prepared in advance, and the technical disclosure shall be made to the operators in time.

同時，風管的安裝施工，除自身工作外，還需要做好與土建之間的協(xié)調配合，避免交叉作業(yè)給管道施工帶來不便和影響。

At the same time, in addition to their own work, the installation and construction of air ducts also need to coordinate with the civil engineering discipline to avoid the inconvenience and impact of cross operation on pipeline construction.

通風管安裝中，也一定要按規(guī)范要求采取加固措施

During the installation of ventilation pipe, reinforcement measures must also be taken according to the specification requirements

1、圓形風管的加固：圓形風管由于其本身的強度較高，而且風管兩端的法蘭起到一定的加固作用

1. Reinforcement of round air duct: because of its high strength, the flanges at both ends of the round air duct play a certain role in reinforcement

當圓形風管的直徑大于或等于800mm，且其管段長度大于1250mm或管段總表面積大于4m2時，每隔l500mm才加設一個扁鋼加固圈，并用鉚釘固定。

When the diameter of the circular air duct is greater than or equal to 800mm, and the length of the pipe section is greater than 1250mm or the total surface area of the pipe section is greater than 4m2, a flat steel reinforcement ring is added every l500mm and fixed with rivets.

為了防止咬口在運輸或吊裝時裂開，圓形風管的直徑大于500mm時，其縱向咬口的兩端用鉚釘或點焊固定。

In order to prevent the undercut from cracking during transportation or hoisting, when the diameter of the circular air duct is greater than 500mm, both ends of the longitudinal undercut shall be fixed with rivets or spot welding.

2、矩形風管的加固：與圓形風管相比，矩形風管自身的強度低，易于產生變形。

2. Reinforcement of rectangular air duct: compared with circular air duct, rectangular air duct has low strength and is prone to deformation.

當矩形風管的大邊長大于或等于630mm，保溫風管大邊長大于800mm，管段長度在1250mm以上，或低壓風管的單邊平面積大于1.2m2，中、高壓風管大于1.0m2時，

When the large side length of rectangular air duct is greater than or equal to 630mm, the large side length of insulation air duct is greater than 800mm, the length of pipe section is more than 1250mm, or the single side flat area of low-pressure air duct is greater than 1.2m2, and the medium and high-pressure air duct is greater than 1.0m2,

為了減少風管在運輸和安裝中的變形，制作時采取加固措施。

In order to reduce the deformation of air duct during transportation and installation, reinforcement measures shall be taken during fabrication.

通風管防火包裹的做法

Practice of fire-proof wrapping of ventilation pipe

1、如果風管的材料不耐火，但是又有可能接觸明火，比如說一段PVC材料的通風管被架設在加熱器附近，那么就有必要做防火處理。

1. If the material of the air duct is not fire-resistant, but it may be exposed to open fire. For example, a section of PVC air duct is erected near the heater, then it is necessary to carry out fire prevention treatment.

2、如果風管輸送的氣體易燃易爆好是有防火包裹。比如一個正壓風管輸送帶有油煙的廢氣，防火包裹能延長通風管耐受時間，避免風管燒毀，大量氣體溢出會導致爆燃。

2. If the gas conveyed by the air duct is flammable and explosive, it is better to have a fire-proof package. For example, a positive pressure air duct transports exhaust gas with oil smoke, and the fire-proof wrapping can prolong the withstand time of the ventilation duct to avoid the burning of the air duct, and a large amount of gas overflow will lead to deflagration.

3、如果風管輸送的氣體對溫度敏感，可能是氣體組分對溫度敏感、容易溫度變性。這時不僅要有恒溫處理，也要有防火處理，以免意外情況發(fā)生。

3. If the gas conveyed by the air duct is sensitive to temperature, it may be that the gas components are sensitive to temperature and easy to change temperature. At this time, there should be not only constant temperature treatment, but also fire prevention treatment to avoid accidents.

4、如果是暴露在高溫易燃環(huán)境，風管一般都要有防火處理。飯店的火灶上部的排風管除外，其一般用花鐵皮板打造，很多時候火焰能燒到。

4. In case of exposure to high temperature and flammable environment, the air duct shall be generally provided with fire prevention treatment. Except for the exhaust pipe on the upper part of the hotel stove, it is usually made of painted iron sheet, and the flame can burn in many cases.

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