Since 1924, The American Petroleum Institute (API) has been the leader in developing equipment and operating standards for the oil and natural gas industry.
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API Chapter 11.1 C-Code: Temperature and Pressure Volume Correction Factors for Generalized Crude Oils, Refined Products, Special Applications, and Lubricating Oils (Flow-Cal website opens in a new window)
E&P Tanks Software: Production Tank Emissions Model, a software program for estimating emissions from hydrocarbon production tanks (API Pbl 4697).
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API Weekly Statistical Bulletin (WSB)
SANGEA 4.1 GHG Emissions Estimating System
Electronic Greenhouse Gas (GHG) emissions calculator tool for the petroleum and natural gas industry