With the improvement of the living standard of decoration, the hotels where people need to eat can be cheap and have a good environment. If the exhaust pipe of the kitchen is not handled well, it will affect people's dining room. Day by day, people gradually find that the installation of the ventilation pipe some years ago has certain damage, or it doesn't work, and Shandong ventilation cabinet can't smoke out. What should we do to fight for it?

　　(1)設置在排煙系統排煙口的上方，設置在有隔墻分隔的機房內，隔墻的耐火極限不得小于2.5h。機房門為防火門，防火極限不小于0.6h。

　　(1) It shall be set above the highest smoke outlet of the smoke exhaust system and in the machine room separated by partition wall, and the fire resistance limit of the partition wall shall not be less than 2.5h. The door of the machine room is fire door, and the fire limit is not less than 0.6h.

　　(2)為方便維護，風機機殼與墻壁或設備的距離不應小于60cm。

　　(2) For the convenience of maintenance, the distance between fan shell and wall or equipment shall not be less than 60cm.

　　(3)排風扇與排氣管的連接應合理。實踐證明，排氣扇與排氣管道連接不當，經常導致風機性能顯著下降。

　　(3) The connection between exhaust fan and exhaust pipe shall be reasonable. Practice has proved that the improper connection between exhaust fan and exhaust pipe often leads to a significant decline in fan performance.

　　(4)排氣扇與排氣口之間應有聯動裝置。當任何一個排氣口被打開時，排風扇可以自動啟動。一旦報警,一頭牛火被證實,煙出口應打開手動或由消防控制室遠程和排煙風機應立即投入使用,通風和空調系統在火災區域應立即關閉。

　　(4) There shall be linkage between exhaust fan and exhaust port. When any exhaust port is opened, the exhaust fan can start automatically. Once the alarm is given, a cow fire is confirmed, the smoke outlet shall be opened manually or remotely by the fire control room and the smoke exhaust fan shall be put into use immediately, and the ventilation and air conditioning system shall be closed immediately in the fire area.

　　(5)排風扇應設置在混凝土或鋼材基礎上，但不得設置減振器，風扇吸水管上不得設置調節裝置。

　　(5) Exhaust fan shall be set on concrete or steel foundation, but vibration damper shall not be set, and regulating device shall not be set on fan suction pipe.

　　1. 管下料

　　1. pipe blanking

　　(1)嚴格按照圖紙執行。切割前應仔細檢查材料的尺寸是否正確。

　　(1) Strictly follow the drawings. Before cutting, carefully check whether the size of the material is correct.

　　(2)切割時應避免材料浪費。

　　(2) Material waste shall be avoided during cutting.

　　(3)管材特殊時，應先出料后切料，以控制管材用量。

　　(3) When the pipe is special, the material shall be discharged first and then cut to control the pipe consumption.

　　(4)若采用不銹鋼管，則應采用機械切割或等離子切割，其余可采用火焰切割。

　　(4) If stainless steel pipe is adopted, mechanical cutting or plasma cutting shall be adopted, and flame cutting can be adopted for the rest.

　　(5)切口端面傾斜偏差不超過2mm。

　　(5) The inclination deviation of the end face of the incision shall not exceed 2mm.

　　2. 坡口制備

　　2. Groove preparation

　　應按照規范要求，連接方式主要是焊接。如果是中低壓管道坡口，則宜采用v型;對于高壓管道，使用YV槽。坡口加工應平整，無任何缺陷。

　　According to the requirements of the specification, the connection mode is mainly welding. If it is the groove of medium and low pressure pipeline, V type shall be used; for high pressure pipeline, YV groove shall be used. Groove processing shall be flat and free from any defects.

　　3.焊接接頭組對

　　3. Welding joint assembly

　　這是針對管道組的，在此之前，我們必須清理管道接口。

　　This is for the pipeline group, before that, we have to clean up the pipeline interface.

　　4. 管道預制

　　4. Pipeline prefabrication

　　管道預制應嚴格按照預制公差進行，預制件應按質量控制要求編號。

　　Pipe prefabrication shall be carried out in strict accordance with prefabrication tolerance, and prefabricated parts shall be numbered according to quality control requirements.