scope:

This Part of the NES relates to the requirements for the manufacture, inspection and testing of 90/10 Copper Nickel Alloy Forgings, Forging Stock, Rods and Sections.

Forgings are placed in four classifications. Class 1 to 3 forgings are in descending order of quality assurance requirements. The classes are defined as follows:

Class 1 A forging whose failure would lead to uncontrollable flooding, the total immobilization of the vessel or serious hazard to personnel.

Class 2 A forging whose failure would lead to severe but controllable flooding, the serious disruption of weapon systems, main propulsion machinery, or its attendant auxiliaries including generators.

Class 3 A forging whose failure does not constitute an immediately significant hazard.

Class 4 A forging which is used for forging stock only.

Rods and sections are not classified.