ASTM D287 API Gravity of Crude Petroleum and Petroleum Products (Hydrometer Method)

The API gravity system, a time honored and very widely accepted measurement, determines specific gravity of petroleum materials in °API.   API gravity can be converted to pounds per gallon, relative density, and many other useful units of measure with the conversion tables available for this purpose. API gravities decrease with increasing densities – light crude oil has an API gravity greater than 31.1°API and extra heavy crude oil has a value less than 10°API.   This method determines the °API of petroleum and petroleum products.

The sample is poured into a jacketed glass cylinder and brought to the test temperature.  A hydrometer is placed in the sample, gently spun to dislodge any adhering air bubbles, given time to equilibrate and the scale is read.  API gravity is reported in °API. 

Price: $75.00

Sample size: 500 ml

Related tests:

• ASTM D891A – Specific Gravity Procedure A Hydrometer @ 20°C
• ASTM D891B – Specific Gravity Procedure B Pycnometer @ 20°C
• ASTM D1122 – Specific Gravity @ 60°F
• ASTM D1298 – Gravity, Specific @ 60°/60°F
• ASTM D1481 – Density by Lipkin Bicapillary Pycnometer up to 100°C – per temp
• ASTM D4052 – Specific Gravity by Digital Density Meter at one temperature