API MPMS Chapter 19.2 2003

This publication contains methods for estimating the total evaporative losses or the equivalent atmospheric hydrocarbon emissions from external floating-roof tanks (EFRTs) and freely vented internal floating-roof tanks (IFRTs), as well as for tanks with external-type floating roofs that also have a freely vented fixed roof. This type of tank is referred to as a covered floating-roof tank (CFRT) in this document.