DNV DNV-CG-0063 PDF

General

All essential machinery, craft piping systems, other essential systems, important equipment and control and monitoring equipment shall be designed and supported to resist the contractual shock level.

These systems and important equipment as defined above shall withstand the contractual shock level without:

— suffering serious degradation of functionality during and after the shock loading or

— experience permanent degradation of foundation and fastenings or

— have serious change of alignment.

The level of functionality may include acceptable damage, which shall be agreed upon by the involved parties, beforehand. This may incorporate:

— no degradation and fully functional; "shock grade 1"

For all parts of the equipment which are necessary for the ship's safety and fulfilment of its combat task. Full function during and after shock load without reduction of performance. No loosening of parts which could endanger crew or other equipment of “shock grade 1”

— must remain safe; "shock grade 2".

All other parts of the equipment which are not essential for safety and fulfilment of combat task. No loosening of parts which could endanger crew or equipment of “shock grade 1”. Compliance with these requirements shall be documented by calculation or through shock testing. This class guideline deals with acceptable principles of shock testing in a laboratory environment, but does not deal with full-scale shock testing of an entire ship.