NOTA: only marking area defined on component drawing or in component specification shallbe used.Nothing shall be marked directly on insulating or insulated parts; but an attached documentshall precise the masses.When marking a part which may be assembled to another part, or on which fittings may beassembled, it shall be specified that the mass indicated applies to the parts alone. If the part isan assembly, the mass corresponding to the total sum of the components shall be indicated.However, if certain components are to be removed from the assembly, the individual massshall be indicated on those components. In instances where the weight of a part varies during astage of manufacture, the greatest mass attained by the part shall be permanently marked atthe beginning of that stage of the production process.