TS 9353

TS 9353 addresses the charts and equations used to convert kinematic viscosity to Saybolt Universal or Saybolt Furol viscosity. Viscosity is a fluid’s resistance to flow; kinematic viscosity expresses that property in a form that accounts for density and is widely used for oils, fuels and other industrial fluids. The Saybolt scales are time-based viscosity expressions with long-standing use in technical practice, especially where flow-time measurements are part of the terminology.

How kinematic viscosity relates to the Saybolt scales

The focus of this standard is the comparison of the same fluid property across two different expressions. Kinematic viscosity is typically used in SI-based technical work, while Saybolt Universal and Saybolt Furol values may appear in applications that still rely on legacy time-based reporting. Conversion charts and equations help users interpret results consistently when the unit of expression is not the same as the unit used in a specification or record.

Technical content covered by the standard

• Charts and equations for converting kinematic viscosities to Saybolt Universal viscosities.
• Charts and equations for converting kinematic viscosities to Saybolt Furol viscosities.
• A reference framework for comparing viscosity quantities expressed in different units.
• A national standard prepared with reference to ASTM D2161:2010.

Standards of this type are useful in laboratory reporting, technical specifications and situations where newer measurements must be reconciled with legacy viscosity terms. The key point is that the document is about conversion between established expressions of the same property, not about defining a new viscosity test method; users should therefore apply the correct Saybolt scale for the intended comparison.