This standard provides: âˆ’ test and statistical methods forgenerating fatigue-distribution data;
âˆ’ test and statistical methods for verifying the pressureratings of quick-action couplings;
âˆ’ common requirements and an industry-wide philosophy forjudging one type of pressure capability for quick-actioncouplings;
âˆ’ uniform methods of product comparison.
This standard limits conditions as follows:
âˆ’ pressure-induced loadings of constant amplitude;
âˆ’ product life of at least 100,000 cycles;
âˆ’ pressure levels and pulse durations as defined in NFPA/T2.6.1R2, clause 8;
âˆ’ temperatures that range from the Charpy impact transitiontemperature to the threshold of creep sensitivity;
âˆ’ environments which are chemically compatible with thematerials in the pressure-containing envelope;
âˆ’ materials that are aluminum, magnesium, iron, steel, stainlesssteel, cobalt, titanium, copper-based alloys, nickelbased alloys,or monel. Specifically excluded are creep-sensitive materials suchas zinc, plastic, rubber and sealing devices;
âˆ’ quick-action couplings which are connected and disconnected bya linear or rotational motion, or both;
âˆ’ quick-action couplings with or without sealing means whenuncoupled.
This standard encourages manufacturers to use this common methodto enhance the credibility of their pressure ratings.