93% acid pipeline
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Our factory uses ordinary carbon steel transfer pipes for 93% acid. At slightly higher temperatures, corrosion often occurs at the water inlet elbow and the acid return elbow. How should this be handled? Replace with a thicker elbow and add a sleeve (I don’t think this method has been used before)
The elbow is lined with steel; the lining is carbon steel for fluorocarbon corrosion resistance
If the pressure is not high, it is recommended to replace the entire pipe with a fluorinated-lined pipe
Use internal interweaving; an inner lining will do
PO materials are generally at room temperature, and the use of 93% sulfuric acid is not recommended. PTFE can basically work at any temperature and concentration. It’s just that PTFE is more expensive than PO