This standard provides:
âˆ’ test procedures for conducting a verification of the fatigueand establishment of burst pressure ratings on pressure switchenvelopes;
âˆ’ test and statistical methods for generating fatiguedistribution data;
âˆ’ common requirements and an industry wide philosophy in judgingone type of pressure capability for fluid power pressureswitches;
âˆ’ Uniform methods of product comparison.
This standard limits conditions as follows:
âˆ’ constant amplitude, pressure induced loading of the elementsthat constitute or maintain the pressure containing envelope;
âˆ’ product life of at least 100,000 cycles;
âˆ’ defined conditions for pressure levels and pulsedurations;
âˆ’ temperatures from the charpy impact transition temperature tothe threshold of creep sensitivity;
âˆ’ environments which are chemically compatible with thematerials of the pressure containing envelope;
âˆ’ materials that are aluminum, magnesium, steel, iron, copperbased alloys, cobalt, titanium, stainless steels, nickel steels andMonel. Specifically excluded are creep sensitive materials such as:zinc, plastic, rubber, and sealing devices.
This standard does not include functional performance of apressure switch, nor the ability to maintain a set point, wheneither the rated fatigue pressure or the rated burst pressure hasbeen applied to the pressure containing envelope.