New Reduced price! NFPA (Fluid) T3.20.8 R2-2000 (R2019) View larger

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

M00016023

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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

standard by National Fluid Power Association, 03/15/2000

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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.