Hi we have a steam-assisted flare using MP steam (min 19 barg, 275°C). The piping is approximately 1.7 km long and this line normally has no flow (NNF). We're concerned about continuous condensate formation hence continuous loss of steam during normal operation. In addition, the flare vendor wants to know condensate inventory that can be expected when flaring operation commences.
I have seen condensate calculation which is based on heat loss via conduction etc, and based on continuous flow of steam (albeit at turndown conditions), but I can't seem to find references for condensate formed in NNF lines.
Appreciate any guidance/feedback