(NFPA) - NFPA T3.20.8
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 quickaction coupling
| Organization: | (NFPA) |
| Publication Date: | 15 March 2000 |
| Status: | active |
| Page Count: | 9 |
scope:
This standard provides: − test and statistical methods for
generating fatigue-distribution
− 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.
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.
This standard encourages manufacturers to use this common method to enhance the credibility of their pressure ratings.
Document History
