DNV DNVGL-CP-0428 PDF

This CP gives a description of the procedures and requirements related to documentation, design and type testing applicable for TA of coating systems for protection of propeller shafts.

This CP does not set the design requirements to the coating systems for protection of propeller shafts. TA is based on compliance with design requirements given in the rules and/or other regulations and standards. The CP describes the applicable requirements and how to document compliance with the requirements in order to obtain a TA certificate for the equipment. This includes, where relevant, technical requirements for how the type tests shall be performed.

The Society's type approval certificate will cover one grade of the actual product with the possibility to include variants.

For a coating system this means:

grade: full coating system, including one or more coats (as per system definition)

variants: colour variants, thinned variants and similar.

The Society's type approval certificate is normally limited to one manufacturer at one production site, however, other arrangements may be agreed upon with the Society.

The approval is solely connected to the corrosion prevention properties of the coating system. The approval does not include any evaluation of toxicity, contamination, pollution, or fire technical properties.

Type tests as specified in Sec.2 [3], are to be carried out and verified in one of the following ways:

at a DNV GL laboratory

at an accredited and independent laboratory accepted by the Society

at the manufacturer’s premises in the presence of a surveyor.

The type test results shall be submitted to the Society for evaluation, in form of a test report according to ISO 17025 and the additional requirements of the relevant test standard.