Standard Test Method for
Water and Sediment in Crude Oil by the Centrifuge Method
This standard is issued under the fixed designation D 4007; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of the last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1.1 This test method describes the laboratory determination
of water and sediment in crude oils by means of the centrifuge
procedure. This centrifuge method for determining water and
sediment in crude oils is not entirely satisfactory. The amount
of water detected is almost always lower than the actual water
content. When a highly accurate value is required, the revised
procedures for water by distillation, Test Method D 4006 (API
MPMS Chapter 10.2) (Note 1), and sediment by extraction,
Test Method D 473 (API MPMS Chapter 10.1), shall be used.
NOTE 1—Test Method D 4006 (API MPMS Chapter 10.2) has been
determined to be the preferred and most accurate method for the
determination of water.
1.2 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are for information
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. For specific
precautionary statements, see 6.1.
2. Referenced Documents
2.1 ASTM Standards:
D 95 Test Method for Water in Petroleum Products and
Bituminous Materials by Distillation (API MPMS Chapter
D 473 Test Method for Sediment in Crude Oils and Fuel
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