BS ISO 7313:2020 pdf free.Aircraft一High temperature convoluted hose assemblies in polytetrafluoroethylene (PTFE). BS ISO 7313 This document specifies characteristics of hose assemblies with corrosion-resistant metallic braid and convoluted polytetrafluoroethylene (PTFE) inner tube for use in aircraft fluid systems at temperatures between -55 °C and +200 °C and at nominal pressures, depending on bore size, up to 6,8 MPa. Special approval...