This document specifies: the properties and performance requirements for tubing, hoses and assemblies made of either rubber or plastics in sizes up to a nominal diameter of 12,5 mm for use with commercial propane and butane and mixtures thereof, in the vapour phase, for the connection of appliances (i.e. for instance, from a cylinder to a regulator, a regulator to an appliance or to a metal tube) in environments in a temperature range from -30 °C to +60 °C. Working pressures are from 0,2 bar to 20 bar.1); the characteristics and performance requirements of the coupling tails and hose assemblies used with, or manufactured from rubber and plastic hoses and tubing at the above temperature range. One class of tubing and three classes of hoses are specified. The class 1, 2 and 3 hoses may be used inside or outside; class 4 hoses are only for outdoor use since their level of permeation is not appropriate for indoor use. NOTE Rubber and plastics tubing, hoses and assemblies conforming to this standard may be used where contact with appliances having a maximum surface temperature of 90 °C may occur. This document does not apply to hoses for welding purposes.