NFPA (Fluid) T3.20.8 R2-2000 (R2019)

NFPA (Fluid) T3.20.8 R2-2000 (R2019)

Quick-action coupling - Pressure rating supplement to NFPA/T2.6.1 R2-2000, Fluid power components - Method for verifying the fatigue and establishing the burst pressure rating of the pressure containing envelope of a metal fluid power quick-action couplin



1.1 This standard provides:
- test and statistical methods for generating fatigue-distribution data,
- test and statistical methods for verifying the pressure ratings of quick-action couplings,
- common requirements and an industry-wide philosophy for judging one type of pressure capability for quick-action couplings,
- uniform methods of product comparison.
1.2 This standard limits conditions as follows:
- pressure-induced loadings of constant amplitude,
- product life of at least 100,000 cycles,
- pressure levels and pulse durations as defined in NFPA/T2.6.1 R2, clause 8,
- temperatures that range from the Charpy impact transition temperature to the threshold of creep sensitivity,
- environments which are chemically compatible with the materials in the pressure-containing envelope,
- materials that are aluminum, magnesium, iron, steel, stainless steel, cobalt, titanium, copper-based alloys, nickelbased alloys, or monel. Specifically excluded are creep-sensitive materials such as zinc, plastic, rubber and sealing devices,
- quick-action couplings which are connected and disconnected by a linear or rotational motion, or both,
- quick-action couplings with or without sealing means when uncoupled.
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) T3.20.8 R2-2000 (R2019)