The issue of pipeline corrosion caused by low and high amine flow rates
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Are there requirements for the flow rate of lean and rich amine streams in the pipelines? Will too low a level accelerate corrosion?
The flow rate of the lean amine stream should not exceed 6 m/s. The flow velocity of the rich amine liquid in the pipes should not exceed 1.5 m/s; in the heat exchanger tubes, it should not be higher than 0.9 m/s. The flow velocity of the rich liquid as it enters the regeneration tower should not exceed 1.2 m/s. In the acidic water system at the top of the regeneration tower, the controlled flow velocity for carbon steel pipelines should not exceed 5 m/s, while for austenitic stainless steel pipelines it should not exceed 15 m/s.
That’s quite detailed; it shows that the higher the flow rate, the greater the corrosion. ------Reduce erosion corrosion.
Amine solution is mainly used to absorb carbon dioxide, and its pH is slightly alkaline.
Personal experience or standard?