NFPA has been instrumental in developing standards tools for assessing the reliability of fluid power
components. These standards can be used to:
The following standards have been published:
To purchase NFPA/T2.12.11-2-2007, Hydraulic fluid power components – Assessment of reliability by testing,
ISO has also published ISO/TR 19972 1:2009, Hydraulic fluid power — Methods to assess the reliability of
hydraulic components — Part 1: General procedures and calculation method, which lists a number of methods
that can be used to assess the reliability of hydraulic components, including several that do not require testing.
All of the parts of ISO 19973 are available for purchase—click
All of these parts are currently under revision, and a new Part 5 for non-return, shuttle, dual pressure, one-way
adjustable flow control and quick-exhaust valves, is in development.
International round robin test programs were conducted to verify the procedures specified in these International
For more information about the NFPA documents, contact Carrie Tatman Schwartz, (414) 778-3347. For more information about the ISO documents, contact Denise Rockhill, (414) 778-3354.