This International Standard specifies requirements for elastomeric materials used in seals for supply pipes and fittings, ancillaries and valves at operating temperatures in general from –5 °C up to 50 °C and in special cases from –15 °C up to 50 °C, for the following:
a) general applications (see Table 4, type G series):
gaseous fuel [manufactured, natural and liquefied petroleum gas (LPG) in the gaseous phase],
hydrocarbon fluids with an aromatic content up to 30 % (by volume), including LPG in the liquid phase;
b) special applications (see Table 4, type H):
materials suitable for carrying gaseous fuels containing gas condensates and hydrocarbon fluids of unrestricted aromatic content.