In This Issue

New Edition of API Primary Measurement Property Standard

API has released the second edition of Chapter 9, Section 3 of the Manual of Petroleum Measurement covering the standard test method for determining API gravity by thermo-hydrometer for crude oil and finished products. API gravity (also known as relative density) is one of the basic measures of liquid hydrocarbons and is used worldwide for custody transfer calculations. For additional information, contact Paula Watkins, Standards, 202-682-8197 or