The Nautical Encyclopedia

Patterson’s Illustrated Nautical Encyclopedia — Howard Patterson, 1891

⚓ The Superstition Locker ⚓

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Home ⚓ Letter L ⚓ Lagging

Lagging

Engineering

The covering of a cylinder or pipe which prevents radiation of heat.

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2026 Editor's Note: Lagging — the boiler's insulation jacket — is still exactly what British builders call pipe insulation; 'lag the pipes' survives every winter. See lagging. (Ed: BR 2026-06-11)

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The Nautical Encyclopedia (1891) is in the public domain; this digital edition © 2026 PhotoOpAI.