guys, i want to ask... i calculated co2 snuffing requirement for vent based on nfpa 12 section 6 (local application system). i determined vent gas rate first, from psv rated capacity.

my question, however, in api 521 section 6.3.3.2, it is mentioned the criteria of maximum reynold number before the gas fully dispersed. my calculation give result that all of the existing psv rates will be fully dispersed if vented (based on the api 521 criteria).

now... can i say that in that case, a co2 snuffing is not required? i mean, a vent is usually sized for the gas to be fully dispersed, right..?

please kindly advice me on this. thank you.