ASTM D4740 for cleanliness and compatibility of residual fuels by Spot test
1. Scope
1.1 This test method describes separate procedures for determining the cleanliness of residual fuel oil and the compatibility of a residual fuel oil with a blend stock. It is applicable to residual fuel oils with viscosities up to 50 cSt (1 cSt = 1 mm2s) at 100°C.
1.2 The values stated in SI units are to be regarded as the standard. The inch-pound units given in parentheses are for information only.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents
2.1 ASTM Standards:
D4057 Practice for Manual Sampling of Petroleum and Petroleum Products
D4177 Practice for Automatic Sampling of Petroleum and Petroleum Products
E 1 Specification for ASTM Thermometers
2.2 ASTM Adjuncts:
Reference Spot Sheet (D4740)
3. Terminology
3.1 Descriptions of Terms Specific to This Standard:
3.1.1 blend stock, n - a finished residual fuel oil or fuel oil component, including petroleum streams ranging from kerosine to residuals and asphalt.
3.1.2 cleanliness, n - of residual fuel, the absence of suspended solids in a finished sample.
3.1.3 compatibility, n - of residual fuel, the absence of suspended solids when equal volumes of a sample and a blend stock are mixed together.
