ASTM D2069 Standard Specification for Marine Fuels
3. Classification
3.1 The marine fuels are classified into two types, distillate and residual fuels.
3.2 The basis for the classification in 3.1 is shown in Annex A1.
4. Materials and Manufacture
4.1 The fuels shall be blends of hydrocarbons derived from petroleum refining. This shall not preclude the addition of small amounts of additives intended to improve some aspect of performance. The fuels shall be free from inorganic acid.
NOTE 2 - For the purpose of this test method, the term "petroleum" is used to include oil from tar sands and from shale.
5. Other Requirements
5.1 The various grades of marine distillate fuels shall conform to the limiting requirements shown in Table 1. A representative distillate fuel sample shall be taken for testing in accordance with Practice D4057 (or equivalent ISO 3170).
5.2 The various grades of marine residual fuels shall conform to the limiting requirements shown in Table 2. A representative residual fuel sample shall be taken for testing in accordance with Practice D4057 (or equivalent ISO 3170).
NOTE 3 - Specific energy is not a part of this specification. If required, the net and gross heat of combustion can be estimated using Test Method D4868.
