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standard by International Organization for Standardization, 04/01/2020
ISO 7313:2020 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 from the proper national authority can be required if these hoses are to be part of a pressurized gas storage system.
Two types of hose assembly are covered in this document:
Type 1: Non-conductive inner tube; and
Type 2: Conductive inner tube.