This standard specifies the characteristics of gasket seal with nickel alloy C seal on heat resisting steel, 3 holes, for pipe couplings for inch series aerospace applications.Nominal pressure: up to 21 000 kPa; depends on the associated tube material and tube wall thickness in the assembly (see EN 4814).Temperature range: - 55 °C to 600 °C.NOTEAssembly in accordance with TR 4815.This part should not be reused after disassembling.