Use in Ships
The Scotch marine boiler achieved near-universal use throughout the heyday of steam propulsion, particularly for the most highly developed piston engines such as the triple-expansion compounds. It lasted from the end of the low-pressure haystack boilers in the mid-19th century through to the early 20th century and the advent of steam turbines with high-pressure water-tube boilers such as the Yarrow.
Large or fast ships could require a great many boilers. The Titanic had 29 boilers: 24 double-ended and 5 smaller single-ended. The larger boilers were 15 feet 9 inches (4.80 m) diameter and 20 feet (6.1 m) long, the smaller were 11 feet 9 inches (3.58 m) in length. All had three corrugated Morrison furnaces of 3 feet 9 inches (1.14 m) diameter, 159 furnaces in total, and a working pressure of 215 pounds per square inch (14.8 bar).
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“The northern sky rose high and black
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East and west the ships came back
Happily or unhappily....”
—Philip Larkin (19221986)