Who knows anything about PVDF and PPH materials?
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The company has a triple-effect evaporator; the pipes used before were made of 316L material, which simply could not withstand saline solutions containing saturated sodium chloride, especially at high temperatures. Titanium is expensive and difficult to process. I’ve seen information stating that PVDF and PPH are resistant to high temperatures and corrosion. In practice, is it okay to use these materials in the saltwater pipes of triple-effect evaporators?
The temperature in the first effect should not exceed 100 degrees, while that in the second and third effects should not exceed 80 degrees. The actual temperature should be 10 degrees lower.
It’s mainly to see if everyone has experience using these two materials.
The heat transfer of organic materials is very poor; how do you take heat transfer efficiency into account when operating them?
Our pipes need to be insulated; no heating is required.
When used on pipes, it can be determined based on the operating temperature and pressure of the plastic; alternatively, a simulation can be carried out first. Additionally, the method of applying an anti-corrosion coating to carbon steel pipes can be considered.
Fluoroplastic pipes are corrosion-resistant and perform well at temperatures below 150 degrees; a shipment was just sent out a few days ago.
It can be made from PVDF, PPH, FRPP, or PP materials; it is best to use FRPP pipes with a casting pressure resistance of 10 kg. Pay attention to the issue of thermal expansion. For elbows, straight sections, and tees, it is best to use socket-type fittings that are cast in one piece.
Will the fluorine-coated layer come off easily? It is rather prone to corrosion.
No, provided the quality is good