Section 1 General requirements
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Naval Ships, January 2023 - Volume 2 Machinery and Engineering Systems - Part 7 Piping Systems - Chapter 5 Ship Type Piping Systems - Section 1 General requirements

Section 1 General requirements

Parent topic: Chapter 5 Ship Type Piping Systems

1.1 General

1.1.1 This Chapter states the requirements for piping systems installed in naval ships for the operation and functioning of equipment installed for purposes relating to the Ship Type.

1.1.2 The requirements in this Chapter cover piping and control systems necessary for ships that have Ship Type piping systems and equipment configured such that, in the event of a single failure or damage in any part of a piping system, the ship will continue to retain availability of services relating to the Ship Type.

1.2 Scope

1.2.1 Ship Type piping systems included in this Chapter are:

  1. Chilled water systems used for:
    1. Weapons and electrical equipment cooling.
    2. Air conditioning systems.
  2. High pressure compressed air systems used for:
    1. Filling breathing air bottles used for diving and firefighting.
    2. Starting air for engines and gas turbines.
    3. Machinery shaft brakes.
    4. Weapon handling and control.
    5. Supply to low pressure compressed air systems through reducing stations.
  3. Low pressure compressed air systems used for:
    1. Control systems for machinery and weapons.
    2. Air tools.
    3. Valve actuation.
    4. General supplies to seals, filters, sewage plant, etc.
  4. High pressure sea-water systems used for:
    1. Fire-fighting and boundary cooling.
    2. Pre-wetting.
    3. Bilge and dewatering eductors.
    4. Emergency cooling of machinery.
    5. Machinery space ventilation coolers in closedown operation.
  5. Hydraulic power actuating systems used for:
    1. Remote controlled equipment (doors, valves).
    2. Platform equipment (lifts, hoists).
    3. Machinery systems (stabilisers, hydraulic motors).

1.2.2 Other systems defined as Ship Type category engineering systems, see Vol 2, Pt 1, Ch 1, 3.1 Categories 3.1.3, as specified.

1.3 Documentation required for design review

1.3.1 In addition to the information required by Vol 2, Pt 7, Ch 1, 2.1 Documentation required for design review 2.1.1, three copies of the plans and information stated in Vol 2, Pt 7, Ch 5, 1.3 Documentation required for design review 1.3.2 to Vol 2, Pt 7, Ch 5, 1.3 Documentation required for design review 1.3.7are to be submitted to Clasifications Register (hereinafter referred to as 'LR') as applicable.

1.3.2  System Design Description. A System Design Description of each Ship Type piping system, see Vol 2, Pt 1, Ch 3, 3.5 System design description.

1.3.3  Systems. Plans in diagrammatic form showing piping arrangements, control systems and safeguards and electrical systems for each Ship Type piping system covered by this Chapter. The capacities of pumps and compressors are to be included. For chilled water systems, heat load calculations or heat balance sheets and capacity tables with condensing temperatures covering the operating range of the refrigeration compressors are also to be included. The tables are to be representative of the compressors operating at the design revolutions per minute with the nominated refrigerant.

1.3.4  Compartments. Plans showing the general arrangement of compartments, together with a description of the Ship Type system(s) installed and the electrical power supply systems. The plans are to indicate segregation and access arrangements for compartments and associated control rooms/stations.

1.3.5  Risk Assessment (RA). For Ship Type piping systems with associated electrical power supplies and control systems, the RA report is to address the requirements in Vol 2, Pt 7, Ch 5, 5 Risk Assessment (RA).

1.3.6  Testing and trials procedures. A schedule of testing and trials to demonstrate that systems are capable of operating as described in Vol 2, Pt 7, Ch 5, 3 System arrangements. Testing and trials procedures are to comply with Vol 2, Pt 7, Ch 5, 6.3 Trials 6.3.1. In addition, any testing programme that may be necessary to prove the conclusions of the RA, see Vol 2, Pt 7, Ch 5, 6.3 Trials 6.3.2.

1.3.7  Operating Manuals. Operating Manuals are to be provided on board and submitted for information where requested by LR. The Manuals are to include the following information:

  1. Particulars and a description of each system.

  2. Operating instructions for all systems.

  3. Procedures for dealing with the situations identified in the RA report.

1.4 Use of alternative standards

1.4.1 Where it is proposed to use arrangements different from those required by this Chapter and the arrangements are in accordance with an applicable National/International Standard, the use of such arrangements will be accepted by LR.

1.4.2 Where alternative design codes/standards are used, they are stated together with any assumptions made.

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