Is The Kitchen Exhausting Smoke Smoothly? Try The Hidden Solution Of 304 Stainless Steel Welded Air Duct

Is the kitchen exhausting smoke smoothly? Try the hidden solution of 304 stainless steel welded air duct

The exhaust pipe in that old house was yellowed after only two years of use, and there was rust in the corners. When I went to wipe it, it felt like I was conducting an archaeological excavation. The problem occurs not in the range hood itself, but in the passage above your head that cannot be directly seen.

The air duct material is the culprit of oil stains

The zinc layer of ordinary galvanized pipes is relatively thin and cannot withstand repeated erosion by high-temperature oil and vapor dozens of times every day. As a result, it corroded and fell off within half a year, causing the pipe walls to become very rough and covered with sludge. My family installed the galvanized pipes in 2019. When I dismantled the pipes for observation in 2021, I found that the inner walls were all covered with yellowish-brown scale.

The pipe body is made of 304 stainless steel. This metal internal structure itself has corrosion resistance, so sticky substances such as cooking oil and smoke cannot hang on it. Therefore, there is no need to wipe the pipe system during daily cooking. This reduces the number of times the range hood filter needs to be cleaned by at least half.

High temperature resistance without softening is the bottom line

When stir-frying, the temperature in front of the stove will exceed 180 degrees. Thin-walled pipes will deform and collapse when encountering such high temperatures, causing the air duct to be blocked. In 2023, a community in Hangzhou collectively complained about oil fume backflow. After investigation, it was discovered that the root cause of the problem was that the polyvinyl chloride pipes in the suspended ceiling had deformed due to heat.

Its melting point is one thousand five hundred degrees, which is the characteristic of 304 stainless steel. In the face of the high heat generated in the kitchen, this is nothing at all. Therefore, the pipe wall will not soften or collapse. Whether in the cold environment of winter or the hot climate of summer, its shape is always round and will not change. In this way, the air flow channel will not be narrowed.

The smoothness of the inner wall determines whether oil will hang on it or not.

After completing the riveting and welding process, you need to smooth out the welds. This will make the inner wall of the tube very rounded and feel like a metal esophagus. The airflow will be gone in a whoosh, and the wind resistance will be so small that you can hardly hear the whirring sound. After the installation was completed, I went to measure it and found that the pressure drop at the elbow was only a dozen Pascals.

For joints with a lot of stubble, such as galvanized pipes, it is easy for oil stains to stick to them. Over time, hard scale will form. If they are not cleaned for three years, the pipes will be blocked. In contrast, the inner wall of a stainless steel pipe with a smooth surface basically does not have this problem.

Dense welds prevent air leakage

There are bulges in the welds of inferior pipes, and there are very many and dense pores, causing oil smoke to penetrate from these gaps into the ceiling next door. When neighbors are cooking and producing a spicy smell, you can clearly smell the smell. In 2024, a concentrated complaint incident occurred in a building in Beijing, China after the house was delivered. After taking the pipes apart and examining them, it was found that the interior was full of tiny sand holes like sand eyes.

The one-piece riveted-welded pipe interface is in a tight state, and there are no unnecessary seams at the arc transition part of the elbow. The air leakage rate is close to zero, and the phenomenon of return air backflow is completely gone.

Circular pipes can withstand pressure for ten years without deformation

With a circular cross-section, it is inherently better at resisting pressure. After hanging it from the ceiling, even if someone is stepping on it upstairs, it will not be afraid at all. I have a friend who is an owner here. When he renovated in 2016, he installed 304 model round pipes.

In 2024, when he was dismantling the old equipment and replacing it with new ones, he took out the old pipe he had used before and inspected it. He found that the pipe was still round in shape and had not been deformed.

There are stress concentrations on the four corners of the square tube. When the temperature is high or low, the phenomenon of bulging may occur. When the time is longer, deformation will occur and the impeller will be stuck, causing the air volume to be directly reduced by 30%.

Customize the size and it will fit properly

This factory does the material cutting work based on the specific height of the ceiling in your home, the diameter of the fan, and the arc of the pipeline. The round pipe elbow and straight pipe components are formed at one time during the production process, so there is no need for cutting operations during on-site construction. After all the accessories are installed, the ceiling cover is added. When combined, it looks like a hidden design style.

On the day after the installation was completed, I turned on the highest setting and stir-fried vigorously. The fumes were sucked away as soon as they rose, and the area around the stove was kept very clean. The complete refreshing feeling comes from the sufficient support provided by the high-quality air duct, and there is no need to worry about yellowing next year.

Please tell me what kind of material is used to make the exhaust pipe in the kitchen of your home. I have been using it for several years. Have there been any signs of yellowing or adhering grease and dirt on the surface? You are welcome to discuss and comment in the comment area. If you think this content is of value, you can click like it and tell it to your friends who are preparing to decorate their houses.