Dear sea friends, I have a question regarding polyphosphoric acid that I’d like to ask everyone
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I would like to ask everyone: when polyphosphoric acid is produced industrially, given its corrosive nature, what material should be used for the pipelines used to transport this substance? How to choose the material for polyphosphoric acid storage tanks? Our installation will soon be put into industrial use, and it requires large heating storage tanks and pipelines for polyphosphoric acid – will carbon steel work?
I would like to thank everyone in advance here
Where are you from? Polyphosphoric acid is required:)
Yes, I’m planning to conduct experiments to verify it recently
Can we chat privately? Some samples are needed for testing
The medium temperature, concentration, and positive/negative pressure must be provided. Specific recommendations can be made: internal PTFE coating, or PTFE sheets, rotational-molded PE, PO, and so on.
The medium temperature, concentration, and positive/negative pressure must be provided. Specific recommendations can be made: internal PTFE coating, or PTFE sheets, rotational-molded PE, PO, and so on.
Our medium is asphalt, the reaction temperature is 180 degrees, and the polyphosphoric acid concentration is 115%. Can the coating you mentioned be used under these conditions?
A great deal of experimentation has already been done on this; 316L will suffice.
Thank you very much for your reply. The cost of 316L is relatively high. Do you have any other materials with a lower cost? The reaction temperature is 170°C, the reaction pressure is at atmospheric pressure, and the medium consists of polyphosphoric acid and asphalt.
This is probably the lowest value for metals