This standard provides:
âˆ’ test and statistical methods for generating fatigue distribution data;
âˆ’ test and statistical methods for conducting a verification of the pressure ratings on FRLs;
âˆ’ common requirements and an industry-wide philosophy in judging one type of pressure capability for FRLs;
âˆ’ uniform methods of product comparison.
This standard limits conditions as follows:
âˆ’ constant amplitude, pressure-induced loading of the elements that constitute or maintain the pressure containing envelope;
âˆ’ product life of at least 100,000 cycles;
âˆ’ defined conditions for pressure levels and pulse durations;
âˆ’ temperatures from the charpy impact transition temperature to the threshold of creep sensitivity;
âˆ’ environments which are chemically compatible with the materials of the pressure containing envelope;
âˆ’ 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;
âˆ’ pressure gauges are specifically excluded.
This standard encourages manufacturers to use this common method to enhance the credibility of their pressure ratings.