BS ISO 9528. Aerospace. Standard-weight polytetrafluoroethylene (PTFE) hose assemblies, classification 204 °C/21 000 kPa. Procurement specification|Pipes, Performance testing, Reinforcing steels, Corrosion-resistant steels, Dimensions, Thermoplastic polymers, Salt-spray tests, High temperatures, Polytetrafluoroethylene, Aviation fuels, Lubricating oils, Test equipment, Resistance measurement, Pressure testing, Quality assurance systems, Vacuum techniques, Performance, Qualification approval, Leak tests, Reinforced materials, Design, Aircraft components, Flexible pipes, Chemical-resistance tests