Standard: (NFPA) - NFPA T3.29.2

PRESSURE SWITCH – 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 PRESSURE SWITCH

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Scope:

This standard provides:

− test procedures for conducting a verification of the fatigue and establishment of burst pressure ratings on pressure switch envelopes;

− test and statistical methods for generating fatigue distribution data;

− common requirements and an industry wide philosophy in judging one type of pressure capability for fluid power pressure switches;

− Uniform methods of product comparison.

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;

− defined conditions for pressure levels and pulse durations;

− 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 creep sensitive materials such as: zinc, plastic, rubber, and sealing devices.

This standard does not include functional performance of a pressure switch, nor the ability to maintain a set point, when either the rated fatigue pressure or the rated burst pressure has been applied to the pressure containing envelope.

Organization: National Fluid Power Association
Document Number: nfpa t3.29.2
Publish Date: 2000-03-15
Page Count: 8
Change Type: REAF
Available Languages: EN
DOD Adopted: NO
ANSI Approved: NO
Most Recent Revision: YES
Current Version: YES
Status: Active

Document History

Document # Change Type Update Date Revision Status
NFPA T3.29.2 Change Type: REAF Update Date: 2000-03-15 Revision: R2 Status: INAC
NFPA T3.29.2 Change Type: REAF Update Date: 2000-03-15 Revision: R2 Status: INAC
NFPA T3.29.2 Change Type: Update Date: 2000-03-15 Revision: R2 Status: INAC

This Standard References

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