AP-42 §7.1.4 / API MPMS 19.2 Rim + Fittings + Withdrawal + Seam
Detailed EFR / IFR / Domed-EFR loss calculation per AP-42 §7.1.4 — decomposes into rim seal, deck-fitting, withdrawal, and (bolted-only) deck-seam losses with seal-type wind exponent and fitting-by-fitting K factors. Replaces the simplified 3–5% reduction factor in the basic Tank Emissions calc.
Tank & Liquid
ft
bbl/yr
psi
°F
psia
lb/lbmol
mph
Seals
bbl/1000 ft²
Deck & Fittings
📚 Theory
Rim-seal wind dependence, P* function derivation, fitting K_F table.