This standard applies to hydraulic hose assemblies consisting of rubber and plastic hoses of several types and hose fittings in accordance with DIN ISO 12151-2 and DIN ISO 12151-3. It defines the most important features for the selection and assignment of hoses and fittings, installation and connection dimensions as well as requirements for the installation of hose assemblies. It also gives guidelines for the selection of hoses and suitable fittings if the piping of a system has already been determined. This standard also provides guidelines for storage, duration of use and required inspections.