NFPA (Fluid) T3.5.26 R2-2000 (R2019)

NFPA (Fluid) T3.5.26 R2-2000 (R2019)

Hydraulic valve - 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 hydraulic valve

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Details

1.1 This standard provides:
test and statistical methods for generating fatigue distribution data,
test and statistical methods for conducting a verification of the pressure ratings on fluid power hydraulic valves,
common requirements and an industry-wide philosophy in judging one type of pressure capability for hydraulic valves typically used in fluid power applications,
uniform methods of product comparison,
hydraulic valves may contain one or more pressure zones. Each pressure zone may have pressure ratings based on a maximum differential pressure to an adjacent lower pressure zone or atmosphere,
attachments (see 3.3) can be rated as integral parts of hydraulic valves or as an independent components.
1.2 This standard limits conditions as follows:
constant amplitude, pressure induced loading of the elements that constitute or maintain the pressure containing envelope,
product life of at least 100,000 cycles,
pressure levels and pulse durations as defined in NFPA/T2.6.1 R2-2000,
temperatures from the charpy impact transition temperature to the threshold of creep sensitivity,
environments which are chemically compatible with the materials of the pressure containing envelope,
materials that are aluminum, magnesium, steel, iron, copper based alloys, cobalt, titanium, stainless steels, nickel steels and monel. Specifically excluded are more creep sensitive materials such as: zinc, plastic, rubber and sealing devices.
1.3 This standard encourages manufacturers to use this common method to enhance the credibility of their pressure ratings.

Additional Info

Author National Fluid Power Association
Published by NFPA-FLUID
Document type Standard
Confirmation date 2019-01-01
Edition 3
Number of pages 9
Keyword NFPA (Fluid) T3.5.26 R2-2000 (R2019)