This International Standard specifies general rules and safety requirements for hydraulic fluid power systems and components used on machinery as defined by ISO 12100:2010, 3.1. It deals with all significant hazards associated with hydraulic fluid power systems and specifies the principles to apply in order to avoid those hazards when the systems are put to their intended use. NOTE 1 See Clause 4 and Annex A. The significant hazard noise is incompletely deal with in this International Standard. NOTE 2 Noise emission depends especially on the installation of hydraulic components or systems into machinery. This International Standard applies to the design, construction and modification of systems and their components, also taking into account the following aspects: a) assembly; b) installation; c) adjustment; d) uninterrupted system operation; e) ease and economy of maintenance and cleaning; f) reliable operation in all intended uses; g) energy efficiency; and h) environment.