In the manufacturing process of smoke exhaust pipe, the thickness of galvanized steel plate is selected according to the manufacturing list of air duct materials in the processing workshop. The galvanized steel plate is loaded into the leveling machine from the loading frame, and the end of the steel plate is cut off after startup. During feeding, check whether the steel plate is inclined, try to cut a steel plate, measure whether the cutting line and edge line of the cut steel plate are straight, and whether the diagonal line is common.

根據料單的切割長度和數量輸入電腦，啟動機器，電腦會主動切割并壓筋。有必要重新檢查用于剪板的材料，以避免錯誤。ACL3100等離子切割機用于特殊形狀的板材，電動剪刀用于切割零散材料。使用固定式移動剪刀時，鋼板應雙手支撐，雙手離刀口不小于5厘米，用力應均勻適當。

Input the cutting length and quantity of the material list into the computer, start the machine, and the computer will actively cut and press the reinforcement. It is necessary to recheck the material used for shearing to avoid errors. Acl3100 plasma cutting machine is used for special shape plates, and electric scissors are used for cutting scattered materials. When using fixed mobile scissors, the steel plate shall be supported by both hands, and the distance between both hands and the knife edge shall not be less than 5cm, and the force shall be uniform and appropriate.

倒角和咬邊連接的風管的咬邊寬度和余量根據板材的厚度確定。底切寬度如下表所示。在各種空調通風風管的制造和施工過程中，采用法蘭角鋼法蘭連接方式：方形法蘭由四根角鋼焊接在一起。劃線下料時要注意保證焊接法蘭內徑不能小于風道外徑，并用砂輪切割機將風道用線截取。

The undercut width and allowance of the air duct connected by chamfer and undercut shall be determined according to the thickness of the plate. The undercut width is shown in the table below. During the manufacturing and construction of various air conditioning and ventilation ducts, flange angle steel flange connection mode is adopted: the square flange is welded together by four angle steel. During marking and blanking, pay attention to ensure that the inner diameter of the welding flange shall not be less than the outer diameter of the air duct, and cut the air duct with a grinding wheel cutter.

下料調直后，在鉆床上鉆鉚釘孔和螺栓孔。通風空調系統的孔間距應大于150m，排煙系統的孔間距不應大于100 mm，將沖孔角鋼均勻分割，放在焊接平臺上進行焊接。焊接時，根據各種標準模具夾緊并壓平。焊接后，在臺鉆上鉆螺栓孔；螺栓孔間距與鉚釘孔間距相同，分布均勻。

After blanking and straightening, drill rivet holes and bolt holes on the drilling machine. The hole spacing of ventilation and air conditioning system shall be greater than 150m, and the hole spacing of smoke exhaust system shall not be greater than 100mm. The punched angle steel shall be evenly divided and placed on the welding platform for welding. During welding, clamp and flatten according to various standard molds. After welding, drill bolt holes on bench drill; The spacing between bolt holes is the same as that of rivet holes and is evenly distributed.

在整個通風系統的設計和施工中，應該注意的是，排煙管道的質量將直接影響整個建筑的通風和通風功能。因此，山東排煙管道對排煙管道加工技術提出了更高的要求。因此，在主樓的排煙管道工程施工中，盡量選擇較大的排煙管道公司，生產設備會更先進，這樣整個排煙管道施工技術才能得到保證，因為生產技術直接關系到排煙管道將來能否使用好。

In the design and construction of the whole ventilation system, it should be noted that the quality of smoke exhaust pipe will directly affect the ventilation and ventilation function of the whole building. Therefore, Shandong smoke exhaust pipe puts forward higher requirements for the processing technology of smoke exhaust pipe. Therefore, in the construction of the smoke exhaust pipe project of the main building, try to select a larger smoke exhaust pipe company, and the production equipment will be more advanced, so that the whole smoke exhaust pipe construction technology can be guaranteed, because the production technology is directly related to whether the smoke exhaust pipe can be used well in the future.

減少有害氣體濃度的市政基礎設施。選擇排煙管道時建議注意。風管生產安裝使用的板材、型材等主要成品是否符合現行國家設計及相關產品標準的規定，并應申請出廠檢驗證書。材料進場時，應按現行國家相關標準進行驗收

Municipal infrastructure to reduce the concentration of harmful gases. Attention must be paid to when selecting smoke exhaust pipe. Whether the main finished products such as plates and profiles used in the production and installation of air ducts comply with the provisions of the current national design and relevant product standards, and the factory inspection certificate shall be applied. When materials enter the site, they shall be accepted according to the current relevant national standards