Expansion Trunks
Expansion trunks are devices used in shipbuilding to compensate for the expansion and contraction of pipes and ducts due to temperature changes. These trunks are typically made of metal and are installed in areas where pipes and ducts pass through bulkheads or decks. Expansion trunks consist of a series of bellows-like sections that can flex and move as the pipes or ducts expand and contract. This helps to prevent damage to the pipes and ducts, as well as to the surrounding structure of the ship. Expansion trunks are an important component of a ship's piping and ventilation systems, and are designed to withstand the harsh marine environment.
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