Section 2 Materials

Clasification Society 2024 - Version 9.40

Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Offshore Units, July 2022 - Part 5 Main and Auxiliary Machinery - Chapter 23 Jacking Gear Machinery - Section 2 Materials

Section 2 Materials

2.1 Material properties

2.1.1 Materials used for the construction of the jacking gear machinery are to comply with the requirements of the Rules for the Manufacture, Testing and Certification of Materials (hereinafter referred to as the Rules for Materials), or a National Standard acceptable to LR. See Ch 1, 2.2 LR Approval – General of the Rules for Materials for additional requirements for materials.

2.2 Non-destructive tests

2.2.1 An ultrasonic examination is to be carried out on all gear blanks where the finished diameter of the surfaces, where teeth will be cut, is in excess of 200 mm.

2.2.2 Magnetic particle or liquid penetrant examination is to be carried out on all surface-hardened teeth. This examination may also be requested on the finished machined teeth of through-hardened gears.

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