NFPA/T3.21.4 R2-2000 (R2014)

NFPA/T3.21.4 R2-2000 (R2014)

Standard Title:Pneumatic 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 pneumatic valveReferenced Standards:NFPA/T2.6.1 R2, ISO 1000, ASTM E466, ISO 5598Standard Scope: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 pneumatic valves; common requirements and 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; product life of at last 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 encourages manufacturers to use this common method to enhance the credibility of their pressur ratings.

Contact Info

6737 W. Washington Street, Suite 2350

Milwaukee, WI 53214

(414) 778-3344 (o)

(414) 778-3361 (f)