The sudden and violent rendering or tearing apart of the permanent structure of a boiler or pressure plant or any part or parts thereof by force of internal steam, gas or fluid pressure causing bodily displacement of the said structure and accompanied by the forcible ejectment of its contents.
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An extended coverage peril and currently a covered peril in nearly every policy of property insurance. The peril remains distinct from steam boiler explosion, which is covered by boiler & machinery insurance.