Section 1 General
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Inland Waterways Ships, July 2022 - Part 5 Main and Auxiliary Machinery - Chapter 18 Elevating Wheelhouse Systems - Section 1 General

Section 1 General

Parent topic: Chapter 18 Elevating Wheelhouse Systems

1.1 Application

1.1.1 The requirements of this Chapter apply to the design and construction of hydraulic systems for raising and lowering of wheelhouses on all types of ships except where otherwise stated.

1.1.2 Special attention is drawn to National and International technical and operational requirements of countries where the ship is registered or operating and which are outside classification as defined in these Rules.

1.1.3 Consideration will be given to special cases or to arrangements which are equivalent to those required by these Rules.

1.1.4 For a general description and definitions of elevating wheelhouse systems, see Pt 3, Ch 13, 1 General requirements.

1.2 Plans and particulars

1.2.1 The following plans and particulars are to be submitted for approval:

  • Arrangement plan of hydraulic cylinder.
  • Detail plans of hydraulic cylinder.
  • Plans showing connections of cylinder(s) to wheelhouse and cylinder(s) to ship.
  • Diagram of hydraulic system.
  • Working and relief pressure of hydraulic system.
  • For synchronised telescopic cylinders, the working and relief pressure for each compartment.

1.3 Materials

1.3.1 All the components raising the wheelhouse are to be of sound reliable construction to the Surveyor's satisfaction.

1.3.2 All components transmitting mechanical forces to the wheelhouse are to be tested according to the requirements of the Rules for the Manufacture, Testing and Certification of Materials, July 2022 (hereinafter referred to as the Rules for Materials).

1.3.3 Where it is proposed to use materials other than those specified in the Rules for Materials, details of the chemical compositions, heat treatment and mechanical properties are to be submitted for approval. In such cases, the values of the mechanical properties used for deriving the allowable stress are to be subject to agreement by LR.

1.3.4 The cylinders, hydraulic power piping, valves, flanges and fittings and all components transmitting mechanical forces to the wheelhouse are to be of steel or other approved ductile material, duly tested in accordance with the requirements of the Rules for Materials. In general, such material is to have an elongation of not less than 12 per cent nor a tensile strength in excess of 650 N/mm2. Special consideration will be given to the acceptance of grey cast iron for valve bodies and redundant parts with low stress levels.

1.3.5 Materials for cylinders having a design temperature less than 0°C are to be in compliance with the Rules for Materials and Charpy-V testing is to be carried out as per the Rules.

1.3.6 Where appropriate, consideration will be given to the acceptance of non-ferrous material.

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