7. Fire resistance

In general, fire resistance must be taken into account in all hydraulic applications involving fluids at risk of ignition. This is particularly important in the iron and steel industry, as well as in the automotive, rail, maritime and aeronautical transport sectors.

Supersonic aeronautics requires impressive lengths of hydraulic piping lines to power moving parts, up to 1,500 m in length. As a result, the hydraulic fluid operates at high pressures of up to 25-30 MPa. The diversity of the hydraulic system's functions means that it passes through every part of the aircraft, and the circuits necessarily run alongside the hottest areas of the aircraft. Furthermore, during rapid descent, high temperatures are associated with more or less atmospheric air pressure. The high pressures used certainly increase the risk of leaks. Spraying hydraulic fluid onto hot parts or...