BS 5306-6.2:1989 specifies requirements and gives recommendations for the design, installation and maintenance of fixed and semi-fixed systems; ancillary portable or transportable equipment provided as part of a pre-planned scheme for applying medium and high expansion foam to fires in buildings, industrial plant and storage facilities. Application rates are specified for medium expansion foam to flammable liquid fires, and for high expansion foam to flammable liquid fires and combustible solid fires.