Heat exchanger model issue
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To this day, many design institutes still determine the design pressure based on the model of the equipment selected for heat exchanger applications; for example, for the standard model BES900-4.0-210-6/25-4I, the design pressure is 4.0 Mpa. The same applies to cases where the entire equipment is made of stainless steel. No matter how low the operating pressure is, it still has to be done according to the model – really impressive.
Using a higher grade instead of a lower one has no downsides apart from the higher cost. :lol