ISO 4639-3:1995

Rubber tubing and hoses for fuel circuits for internal-combustion engines — Specification — Part 3: Oxidized fuels

Specifies requirements for rubber tubing and hoses for use in fuel circuits where the fuel can become oxidized or “sour”. Does not cover any equipment used for the distribution of liquid fuels, nor tubing totally immersed in fuel tanks. The hoses and tubing are used in recirculating fuel injection systems and in other systems which, having been charged with fuel, may be subject to exceptional storage conditions at high ambient temperatures.