It is suitable for kitchen oil fume exhaust pipes. Since the melting temperature of PVC material is between 185~205°C, its stability is very strong, and the temperature of oil fume is far from this temperature. PVC material has high chemical stability, so it can be used to manufacture anti-corrosion pipelines, pipeline fittings, oil pipelines, etc. PVC material is one of the largest plastic products in the world, cheap and versatile.
For long-term consideration, please use 160# PVC pipe to connect it to the top of the range hood. You need a hose that is long enough. Under the working conditions of the range hood, the hose will tremble constantly due to the wind, and the new air pipe will be no problem. But it has been a long time, the air duct is aging, and the vibration is enough to cause the duct to rupture and leak oil. And PVC pipes do not have this problem, you can safely seal them on the ceiling, you can use them for a lifetime. The section from the bottom of the range hood to the PVC nozzle is sufficient.
Second, the installation design of the kitchen exhaust pipe
The plumbing layout of the kitchen should follow the “shortest” principle, and use fewer elbows, especially large-angle elbows. This piping arrangement is different from the “horizontal and vertical arrangement” of air conditioners. The purpose is to ensure the smoke exhaust effect and save investment. The main outlet cover of the air collector is located in the center above the cover.
The silencer is installed on the fresh air duct and the exhaust duct through the room partition wall. The exhaust pipe of the kitchen should try to avoid excessively long horizontal air ducts.
Otherwise, it is not conducive to the rapid emission of flue gas and affects the exhaust effect. Generally, the maximum distance of the exhaust pipe does not exceed 15m. The inclination of the horizontal pipeline should be greater than 2%, the exhaust hood should be inclined, and an oil collecting tank should be installed in the lower part of the pipeline.
The mechanical or natural vertical exhaust pipe of the kitchen should take measures to prevent backflow. The ends of the horizontal pipes are connected by movable flanges to remove grease. In principle, it is not allowed to discharge oil fume into underground sewage or drainage wells, the effect is extremely poor, and it is impossible from a health and safety point of view.
The main air inlet and smoke outlet of the kitchen should be set separately to prevent short circuit, and the distance between the air inlet and the outdoor natural ground should be greater than 2m. If the air inlet and air outlet are located on the same floor, facing the same direction and approaching, the air inlet must be lower than the air outlet.
The airflow from the air outlet must not flow back to the air inlet in different directions. When the height of the building where the kitchen is located is less than or equal to 15m, the smoke outlet should be higher than the roof. In principle, the smoke outlet should be 2m higher than the building. When the height of the building is greater than 15m, the height of the smoke outlet should be greater than 15m. A pipe cap (pipe cover) should be installed at the outdoor exhaust port of the oil fume exhaust pipe to avoid the influence of outdoor wind pressure.
Based on the knowledge introduced for everyone above, we know that PVC pipe is a high temperature resistant and stable material used to make kitchen oil fume exhaust pipes. You can choose and design according to actual needs. Hope the above knowledge is helpful to you.