This International Standard specifies the requirements for straight or pre-formed rubber hoses and tubing for
use in pressurized or unpressurized cooling circuits containing 1,2-ethanediol-based coolants in internalcombustion
engines for vehicles with an unladen mass (as defined in ISO 1176) of 3,5 t or less. In addition,
this specification may also be applied as a classification system to enable original equipment manufacturers
(OEMs) to detail a “line call-out” of tests for specific applications where these are not covered by the main
types specified (see example in Annex D). In this case, the hose or tubing would not carry any marking
showing this ISO specification number but may detail the OEM's own identification markings as shown on
their part drawings.