Seeking help regarding the differences between ammonia storage tanks and liquid ammonia storage tanks
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There are currently two storage tanks, containing liquid ammonia and ammonia gas respectively. The storage tank material is Q345R. May I ask how to determine the corrosion margin for the two storage tanks? Do ammonia storage tanks require heat treatment?
If the poster is using anhydrous ammonia, it is non-corrosive; the corrosion allowance can be selected according to the requirements. Heat treatment should be required for all of them.
It seems that different media fall into different categories, and containers may also be classified differently, which leads to differences in manufacturing and inspection processes
The corrosion allowance is selected according to standards, while whether heat treatment is applied is determined based on the material and wall thickness.
NB/T 47012-2010 9.4.1 stipulates that post-weld heat treatment shall be carried out if one of the following conditions is met: (a) Ammonia storage containers made of Q345