Section 13 Water jet units

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 1 General Requirements - Chapter 3 Requirements for Design, Construction, Installation and Sea Trials of Engineering Systems - Section 13 Water jet units

Section 13 Water jet units

13.1 Design

13.1.1 For details of design requirements, see Vol 2, Pt 4, Ch 2 Water Jet Systems.

13.2 Construction and welding

13.2.1 The following components are to be inspected at the manufacturer's works:

Steering nozzle.
Reverse bucket.
Stator impeller.
Integral bearing.

13.2.2 Welded construction is to be in accordance with the requirements specified in Ch 13 Requirements for Welded Construction of the Rules for Materials.

13.2.3 Welded components are to comply with the requirements of Vol 1, Pt 3, Ch 3 Ship Control Systems, and be subject to stress relief heat treatment upon completion. Where an impeller has welded blades, non-destructive testing is to be carried out to an approved procedure.

13.3 Testing

13.3.1 Testing of the first installation of a new type of water jet unit is required and is to demonstrate the adequacy of the steering and reversing mechanisms during the most arduous manoeuvres.

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