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Norm

ISO 23581:2024

Issue date: 2024 05 14

Petroleum products and related products — Determination of kinematic viscosity — Method by Stabinger type viscometer

This document specifies a procedure for the determination of kinematic viscosity, ¿, by calculation from dynamic viscosity, ¿, and density, ¿, of both transparent and opa...
Valid
Publisher:
International Organization for Standardization
Format:
Digital | 18 Pages
Language:
English

This document specifies a procedure for the determination of kinematic viscosity, ¿, by calculation from dynamic viscosity, ¿, and density, ¿, of both transparent and opaque liquid petroleum products and crude oils using the Stabinger type viscometer.

The result obtained using the procedure described in this document depends on the rheological behaviour of the sample. This document is predominantly applicable to liquids whose shear stress and shear rate are proportional (Newtonian flow behaviour). If the viscosity changes significantly with the shear rate, comparison with other measuring methods is not possible except at similar shear rates.

The precision has been determined only for the materials, density ranges and temperatures described in Clause 13. The test method can be applied to a wider range of viscosity, density, temperature and materials. It is possible that the precision and bias are applicable for materials which are not listed in Clause 13.

ISO 23581:2024
2024 05 14
Petroleum products and related products — Determination of kinematic viscosity — Method by Stabinger...
Norm
ISO 23581:2020
2020 07 17
Petroleum products and related products — Determination of kinematic viscosity — Method by Stabinger...
Norm