This Part of BS 5482 gives guidance and recommendations for the installation of liquefied petroleum gas (LPG) supply systems at permanent dwellings, including residential park homes, and small commercial premises, with installation pipework sizes not exceeding DN 25 for steel and DN 28 for corrugated stainless steel or copper. It applies to systems using either commercial propane from cylinders or bulk supply at a pressure of 37 mbar, or commercial butane from cylinders at a pressure of 28 mbar. It makes recommendations on the selection of materials and components, on design considerations, on installation, on inspection and testing and on user instructions.NOTE 1 Gas storage and distribution systems for multiple consumers are outside the scope of this standard.This standard does not cover the installation requirements of bulk tanks supplying LPG, for which guidance is given in LPGA Code of Practice 1, Parts 1. 2, and 4. [7].Appliances incorporating their own gas supply, such as mobile heaters, are not considered to be part of the installation and are thus outside the scope of this standard.NOTE 2 It is recognized that this standard may be referred to for LPG installations other than those concerned with domestic systems at permanent dwellings and residential park homes. In these instances it has to be borne in mind that other codes of practice, standards and regulations may apply.This standard does not cover leisure accommodation vehicles (see BS EN 1949).