I believe there is some misunderstanding about this query.
Liquid Carbon Dioxide is a saturated liquid at the conditions of 250 psig and approximately -8 oF. This saturated liquid is essentially totally anhydrous (it contains no water). All CO2 stored or distributed at these conditions (which is the generally standard, industrial method) is previously dried in fixed-bed adsorbers to an average water content of 1.0 PPM (or less) prior to being liquefied. As a result of this process, there is no plausible reason to design for - or expect - any corrosion from so-called "carbonic acid" (a combination of CO2 gas and water - which IS corrosive). All manufacturers and distributors of bulk Liquid CO2 handle this product in standard, insulated. (usually A516 steel) "bullet" type tanks and carbon steel pipe.
NACE does not (& has never entered) into this application. NACE's understandable concern would be applicable if we were dealing with a corrosive fluid. However, pure, anhydrous, LIQUID CO2 IS NOT A CORROSIVE FLUID. That has been a proven fact for as long as I've been in that business. I don't believe there is any need for concern with corrosion in this relatively benign operation.
If the liquid CO2 has water in it, then that's another story. But the OP has not stated that.