BS ISO 6072:2011

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Test elastomers
5 Designation system for the elastomer
  compatibility index (ECI)
6 Determination of the ECI
7 Test report
8 Identification statement (reference to
  this International Standard)
Annex A (informative) - Further information on
        Hydraulic fluids and the types of
        elastomer used with them
Annex B (informative) - Example of test
        report - Fluid-elastomer compatibility
        index (ECI)
Annex C (informative) - Rapid method for
        indicating, by measuring the volume
        change index (VCI), the change in
        volume of commercial rubbers
        when treated with mineral-based oils
National Annex NA (informative) - Guidelines on
                  elastomer compatibility
Bibliography

Describes test methods for evaluating the Effect of hydraulic fluids on standard Elastomeric materials that have been manufactured in accordance with specified processes.

This International Standard specifies test methods for evaluating the effect of hydraulic fluids on standard elastomeric materials that have been manufactured in accordance with specified processes. It allows baseline comparisons of fluids with standard elastomers. This International Standard provides formulations, mixing procedures and vulcanization procedures for five types of elastomeric composition: acrylonitrile-butadiene rubbers (NBR 1 and NBR 2); fluorocarbon rubber (FKM 2); ethylene propylene diene rubber (EPDM 1); hydrogenated acrylonitrile-butadiene rubber (HNBR 1). These procedures evaluate the effect of mineral-based, fire-resistant and biodegradable hydraulic fluids on such compositions by measurement, under controlled conditions, of physical properties of standard test pieces of the elastomer before and after immersion in the fluids. This International Standard does not provide formulations of elastomeric materials for actual service, although service elastomers may be tested using these compatibility procedures if required. NOTE The elastomeric materials used in these formulations are sensitive to fluid variations and have comparatively high swelling characteristics. Stable cure systems can be used to give adequate storage life.