ASTM D4006 is the ASTM standard for water in crude oil by distillation, providing a defined test approach for measuring water content in crude oil samples. This matters because water content can affect product quality, handling, and downstream processing decisions. By using a standardized distillation-based method, laboratories and operators can support more consistent results and clearer comparison between samples. ASTM D4006 helps anchor routine testing in a recognized technical framework.

ASTM D4006 standard overview

The ASTM D4006 standard focuses on determining water in crude oil through distillation, making it a practical reference for analytical testing. Its title indicates a laboratory method built around separating and measuring water content rather than estimating it indirectly. That makes the standard useful where consistent, repeatable results are needed for crude oil evaluation. As an ASTM standard, it supports common testing workflows and helps align measurement practices with an established industry method.

Where is ASTM D4006 used?

This standard is commonly used in crude oil testing settings where water content needs to be measured as part of incoming inspection, routine quality checks, or batch evaluation. It is relevant to laboratories, field-support testing programs, and other workflows that handle crude oil samples. In practice, ASTM D4006 may be used anywhere a distillation-based method is needed to assess water in crude oil with a recognized and repeatable procedure.

Practical importance of ASTM D4006

ASTM D4006 is important because water content can influence quality decisions, transfer acceptance, and overall product evaluation for crude oil. A standardized method helps improve consistency across laboratories and reduce ambiguity in reporting. It can also support procurement and compliance processes by giving buyers and sellers a common technical reference. For quality control teams, the standard provides a reliable basis for comparing results over time and across different samples.

• Water determination in crude oil
• Distillation-based test method
• Laboratory quality control support
• Consistent sample comparison
• Technical reference for testing workflows