7.2.1 Pipes, valves and fittings are to be constructed of steel or other
approved materials suitable for the intended service. Where applicable, the
materials are to comply with the requirements of Pt 5, Ch 12 Piping Design Requirements, or an acceptable Standard or Code.
7.2.2 Piping systems for the oil storage or process transport systems are, in
general, to be separate and distinct from marine and utility piping systems
essential to the safety of the unit. Substances which are known to present a hazard
due to a reaction when mixed are to be kept entirely separate.
7.2.3 The oil process transport piping systems, piping and fittings forming
parts of such systems are to comply with Chapter 8. For units with oil storage
tanks, the requirements of Pt 5, Ch 15 Piping Systems For Oil Storage Tanks are applicable.
7.2.5 Loading and discharging hoses are to be designed in accordance with
acceptable recognised Standards. The selected hose is to be designed and constructed
such that it is suitable for its intended purpose, taking into account pressure,
temperature, fluid compatibility and mechanical loading, see also
Pt 5, Ch 15, 3.4 Terminal fittings at cargo loading stations of the Rules for Ships.
7.2.6 Instrument control isolation valves are to be in the locked open
position.
7.2.8 Where valves of the piping systems are arranged for remote control and
are power-operated, a secondary means of operating the valves is to be
considered.
7.2.9 Watertight compartments are to be provided with power pump suctions for
dealing with their drainage. Special attention is to be given to compartments
containing equipment which is essential to the safe operation of the installation.
The drainage systems are to comply with the requirements of Pt 5, Ch 12 Piping Design Requirements.