ISO 7421:1991 PDF

Scope: This International Standard specifies requirements with reference to safety for installing liquefied pet-roleum gas systems and appliances supplied solely from liquefied petroleum gas cylinders, in leisure accommodation vehicles. It does not cover portable appliances or requirements for post-catalytic heat-ers in which the fuel remixing of gas and air is ef-fected before the catalytic bed is reached; nor does it cover appliances employing after-burners in which the products of incomplete combustion from normal flames are further oxidized over a catalyst. Special requirements for the installation of space heaters in motor caravans are specified in ISO 8377-2. NOTE 1 This International Standard is one of a series for the habitation aspects of leisure accommodation ve-hicles.

ISO 7421:1991 history

1991 ISO 7421:1991 Leisure accomodation vehicles; liquefied petroleum gas systems