Section 3 Steam Boilers and Boiler Feed Systems

301. General

1. Water tube boilers serving turbine propulsion machinery are to be fitted with a high-water-level alarm.

2. Every steam generating system which provides services essential for the propulsion of the unit is to be provided with not less than two separate feedwater systems from and including the feed pumps, noting that a single penetration of the steam drum is acceptable. Means are to be provided which will prevent overpressure in any part of the systems.