Section 28: Proposals for reduction of pressure

When the inspector decides that a boiler in one or more of its parts is no longer fit for the pressure approved for it he should, without delay, report his proposals for reducing the pressure to the Chief Inspector and at the same time submit his calculations for the wasted parts for check arid approval of pressure. With regard to pitting and wasting of shell plates the Inspector must bear in mind that shell plates ordinarily are considerably stronger in the body of the plate, owing to being unpierced than at the seams and consequently may become reduced in thickness to an appreciable extent in the body of the plate, i.e. elsewhere than at the seams, and still be stronger than the seams.