Work out vapour loss instantly with clear inputs, formula shown and shareable results.
Tank vapour loss splits into working loss, which occurs when product is pumped in and displaces vapour, and standing loss, which is the daily breathing caused by temperature and pressure cycling. Working loss scales with throughput; standing loss scales with roof area and is what floating roofs and vapour recovery target.
Vapour loss
Working loss = throughput x working loss factor; standing loss = roof area x standing loss factor
Volatile organic compound emissions from storage tanks are regulated. Use the estimation method prescribed by your air quality authority for any compliance reporting.
Internal or external floating roofs cut standing loss by 90% or more, and vapour recovery units capture displaced vapour during filling. Both also reduce fire risk and odour complaints.
Yes in most jurisdictions. Volatile organic compound emissions from storage are inventoried under air quality regulation, usually using a published estimation method such as the AP-42 tank equations.