Section 5 Piping systems
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Ships, July 2022 - Part 5 Main and Auxiliary Machinery - Chapter 4 Gas Turbines - Section 5 Piping systems

Section 5 Piping systems

Parent topic: Chapter 4 Gas Turbines

5.1 General

5.1.1 Gas turbine piping systems are, in general, to comply with the requirements given in Pt 5, Ch 12 Piping Design Requirements and Pt 5, Ch 14 Machinery Piping Systems, due regard being paid to the particular type of installation. For the burning of compressed natural gas, see the Rules and Regulations for the Construction and Classification of Ships for the Carriage of Liquefied Gases in Bulk, July 2022 .

5.1.2 The materials and/or their surface treatment used for the storage and distribution of fuel oil are to be selected such that they do not introduce contamination or modify the properties of the fuel.

5.1.3 Corrosion resistant materials are to be used in all fuel pipes between the treatment and combustion systems.

5.1.4 Suitable fuel treatment systems, including filtration and centrifuging, are to be provided to control the level of water and particulate contamination within the engine manufacturer's specified limits.

5.1.5 The gas turbine design and construction is to minimise the possibility of a fire fed by fuel or lubricating oil leaks.

5.1.6 In dual-fuel applications, provision is to be made for automatic isolation of both primary and standby fuel supplies to the engine in the event of a fire.

5.2 Fuel oil systems

5.2.1 Fuel oil arrangements are to comply with the requirements of Pt 5, Ch 14 Machinery Piping Systems.

5.2.2 All external high pressure fuel oil delivery lines between the pressure fuel pumps and fuel metering valves are to be protected with a jacketed piping system capable of containing fuel from a high pressure line failure to prevent fuel oil or fuel oil mist from reaching a source of ignition on the engine or its surroundings.

5.2.3 Suitable arrangements are to be made for draining any fuel oil leakage from the protection required by Pt 5, Ch 4, 5.2 Fuel oil systems 5.2.2 and to prevent contamination of the lubricating oil by fuel oil. An alarm is to be provided to indicate that leakage is taking place.

5.2.4 At least two filters are to be fitted in the fuel oil supply lines to the gas turbine and be so arranged that any filter may be cleaned without interrupting the supply of filtered fuel oil to the gas turbine.

5.3 Lubricating oil systems

5.3.1 Lubricating oil arrangements are to comply with the requirements of Pt 5, Ch 14 Machinery Piping Systems.

5.3.2 Where the lubricating oil for gas turbines is circulated under pressure, provision is to be made for the efficient filtration of the oil. At least two filters are to be fitted in the lubricating oil supply lines to the gas turbine and be so arranged that any filter may be cleaned without interrupting the supply of filtered lubricating oil to the gas turbine.

5.4 Cooling systems

5.4.1 Cooling water arrangements are to comply with the requirements of Pt 5, Ch 14 Machinery Piping Systems, where appropriate.

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