The word ‘separate’ is defined in the IBC Code 1.23.24 as ‘Separate’ means that a cargo piping system or cargo vent system, for example, is not connected to another cargo piping or cargo vent system. This separation may be achieved by the use of design or operational methods. Operational methods should not be used within a cargo tank and should consist of one of the following types:
.1 Removing spool-pieces or valves and blanking the pipe ends.
.2 Arrangement of two spectacle flanges in series, with provisions for detecting leakage into the pipe between the two spectacle flanges.