ANSI/(NFPA)T3.21.4 R2-2000 (R2005)

Pneumatic valve - Pressure rating supplement to NFPA/T2.6.1 R1-1991, Fluid power systems and products - Method for verifying the fatigue and establishing the burst pressure ratings of the pressure containing envelope of a metal fluid power pneumatic valve

This standard provides: test & statistical methods for generating fatigue distribution data; test & statistical methods for conducting a verification of the pressure ratings on pneumatic valves; common requirements & an industry-wide philosophy in judging one type of pressure capability for pneumatic valves; uniform methods of product comparison. This standard limits the conditions as follows: constant amplitude, pressure induced loadings of the elements that constitute or maintain the pressure containing envelope; defined conditions for pressure levels & pulse durations; temperatures from the charpy impact transition temperature to the threshold of creep sensitivity.