This standard specifies requirements for five types of rubber hose and
hose assembly used in automobile power-steering systems, the five
types differing in their pressure ratings and volumetric expansion. They
are for use with fluids in the temperature range − 40 °C to + 135 °C. This
standard is based on performance tests and, in order to take account of
technological developments, no requirements are included for specific
materials, detailed construction or manufacturing methods.