scope:

This part of ISO 10771 specifies a method of fatigue testing the pressure-containing envelopes of components used in hydraulic fluid power systems under sustained steady cyclic internal pressure loads. This part of ISO 10771 is only applicable to component pressure-containing envelopes that: .are manufactured from metals; .are operated at temperatures that exclude creep and low-temperature embrittlement; .are only subjected to pressure-induced stresses; .are not subjected to loss of strength due to corrosion or other chemical action; .may include gaskets, seals and other non-metallic components; however, these are not considered part of the pressure-containing envelope being tested, (see note 3 in 5.5).