BS ISO 22241-4:2009

1   Scope This part of ISO 22241 specifies the refilling interface for the NOx reduction agent AUS 32 in compliance with ISO 22241-1, which is needed to operate converters with a selective catalytic reduction (SCR) exhaust treatment system. This part of ISO 22241 specifies the minimum functional and geometric requirements of an open refilling system , in order to ensure compatibility between the on-board refilling system and the off-board refilling system . Compatibility conditions for a sealed refilling system are provided in Annex A. This part of ISO 22241 applies to commercial vehicles and buses as defined in ISO 3833 and having a gross vehicle mass of more than 3,5 t, designed to use stationary off-board refilling systems . This part of ISO 22241 also applies to the nozzle of stationary off-board refilling systems .

   NOTE  Throughout this part of [ISO 22241](/search?q=ISO%C2%A022241), the term “NOx reduction agent AUS 32” is abbreviated as “AUS 32”.