NFPA (Fluid) T3.29.2 R2-2000 (R2019)

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1.1 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.

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;
– 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.

1.3 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.

Product Details

Edition:

3rd

Published:

03/15/2000

Number of Pages:

8

File Size:

1 file , 180 KB