BS ISO 6072:2011:2012 Edition
$142.49
Rubber. Compatibility between hydraulic fluids and standard elastomeric materials
Published By | Publication Date | Number of Pages |
BSI | 2012 | 30 |
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.
PDF Catalog
PDF Pages | PDF Title |
---|---|
7 | Foreword |
8 | Introduction |
9 | Scope_Exist 1 Scope 2 Normative references |
10 | 3 Terms and definitions 4 Test elastomers 4.1 General 4.2 Standard acrylonitrile-butadiene rubber with 28 % acrylonitrile content (NBR 1) |
12 | 4.3 Standard acrylonitrile-butadiene rubber with 34 % acrylonitrile content (NBR 2) |
13 | 4.4 Standard fluorocarbon rubber (FKM 2) |
15 | 4.5 Standard peroxide-vulcanized ethylene propylene diene rubber (EPDM 1) |
16 | 4.6 Standard hydrogenated acrylonitrile-butadiene rubber with 35 % acrylonitrile content (HNBR 1) |
18 | 5 Designation system for the elastomer compatibility index (ECI) 6 Determination of the ECI 6.1 Test conditions |
20 | 6.2 Determination of change in volume, change in hardness and change in tensile strength and elongation at break 7 Test report |
21 | 8 Identification statement (reference to this International Standard) |
22 | Annex A (informative) Further information on hydraulic fluids and the types of elastomer used with them |
24 | Annex B (informative) Example of test report — Fluid-elastomer compatibility index (ECI) |
25 | Annex C (informative) Rapid method for indicating, by measuring the volume change |
27 | Bibliography |