Recommended Practice – Hydraulic Fluid Power – Fluids – Viscosity Selection Criteria for Hydraulic Motors and Pumps
standard by National Fluid Power Association, 04/04/2002

Hydraulic fluid power components – Assessment of reliability by testing
standard by National Fluid Power Association, 02/22/2007

Fluid power systems and components – Reliability analysis, field data reporting format and database compilation
standard by National Fluid Power Association, 04/02/2009

Hydraulic fluid power – Systems and products – Testing general measurement principles and techniques [to be used in conjunction with NFPA/T2.12.1]
standard by National Fluid Power Association, 07/01/2002

Hydraulic fluid power – Systems and products – Method of measuring average steady-state pressure [to be used in conjunction with NFPA T2.12.10]
standard by National Fluid Power Association, 07/01/2002

Symbols for marking electrical leads and ports on fluid power valves
standard by National Fluid Power Association, 09/01/1969

Groove dimensions for fluid power radial compression type piston rings
standard by National Fluid Power Association, 12/18/1973

Air line filter, regulator and/or lubricator – Pressure rating supplement to NFPA/T2.6.1 R2-2000, Fluid power components – Method for verifying the fatigue and establishing the burst pressure ratings of the pressure containing envelope of a metal fluid po
standard by National Fluid Power Association, 03/15/2000

Hydraulic filter/separator housing – Pressure rating supplement to NFPA/T2.6.1 R2-2000, Fluid power components – Method for verifying the fatigue and establishing the burst pressure ratings of the pressure containing envelope of a metal fluid power hydrau
standard by National Fluid Power Association, 03/15/2000

Finite Life Hydraulic Filter Pressure/Life Rating – Method For Verifying The Fatigue Life Rating And The Burst Pressure Rating Of The Pressure Containing Envelope Of A Spin-On Hydraulic Filter
standard by National Fluid Power Association, 05/10/1995