Rigid couplings with special friction treatment
|Publication Date:||1 December 2019|
This CP gives a description of the procedures and requirements related to documentation, design and type testing applicable for rigid couplings with friction increasing treatment.
The CP describes the applicable design requirements and how to document compliance with the requirements in order to obtain a TA certificate for the coupling. This includes, where relevant, technical requirements for how the type tests shall be performed.
Tests as specified in Sec.3 , shall be carried out and verified in one of the following ways:
- at a DNV GL laboratory
- at a recognized and independent laboratory or a laboratory accepted by the Society
- at the manufacturer's premises in the presence of the Society.
The results shall be submitted to the Society in form of a test report incl. conclusion.
This CP covers design assessment and type testing, and forms the basis for the issuance of a type approval certificate (TAC).
This CP is applicable for rigid shaft couplings used for torque transmission in propulsion or auxiliary plants. Application of static friction coefficient higher than specified in the Class Rules requires an approval of the friction increasing treatment, see DNVGLRUSHIP Pt.4 Ch.4 Sec.1 [2.4.1] 6) and DNVGLRUSHIP Pt.4 Ch.4 Sec.1 Table 7.