The new flat-face series FFH has notably higher performances than FFI couplings. They also exceed the performances requested by ISO 16028 regulations. Working pressure has been raised to 35MPa and the flow rates have been highly improved. FFH couplings have undergone severe impulse tests in order to check their resistance to pressure peaks within the systems. A further plus is the Zinc-Nickel surface treatment which improves their resistance to corrosion (min 500h to red corrosion).