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High temp flexible duct is a flexible hose with silicone coating. Silicone coated fibreglass fabric absorbs fibreglass cloth as the raw material. Then coat the silicone evenly and formed with rolling. Coated on the fibreglass fabric, the density is high. While the quality silicone distributes evenly. Such structure has excellent air tightness. Thus it can cut off water, steam and other chemical solvents. Meanwhile, it has good tearing strength. Thus it can prevent the hose from the damage by sharp things.
How high temp flexible duct bear the pressure
Such high temp flex duct is mainly reinforced by the steel rings on the surface. While the pressure that it bear is also depend on the steel ring. Mainly by the thickness and density. The thick the steel ring is, the better the pressure resistance is. But the space of each will be large. On the contrary, the thin the steel ring is, the poorer the pressure resistance will be.
The duct widely serves in high temp areas such as steel factory and refinery. Besides, it becomes more and more popular. Thus the develop prospect is wide. Why it’s popular in such places is because its great temp resistance. It can bear max 400℃. Thus we can say it’s the necessary material in high temp apps.
Then what cause high temp flexible duct burst?
The first reason is quality problem. Some supplier cheats on material to save cost and earn more profit. For example, there should be 50 steel rings on the hose. But in fact there are only 40. That will cause the silicone duct fail earlier. Some even fail within few hours.
Another reason is the pressure problem. If the space among steel rings is too large, the low pressure resistance will be poor. Then it cause crack on the duct hose. So you should make sure the pressure first. Then adjust the steel ring space.
Orientflex is an expert in duct hose solution. If you have any question or inquiry about duct hose, feel free to contact us.
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