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Pressure vessels shall be checked to determine conformance with the applicable requirements, thoroughly cleaned, internally examined, and then subjected to a hydrostatic test at 150% of the working pressure for 1 min (3.24.4) (Item 2.33).

Related Code Sections

424.85 Equipment for General Use, Grounding
For those boilers designed such that fault currents do not pass through the pressure vessel, and the pressure vessel is electrically isolated from ...
425.85 Equipment for General Use, Grounding
For those boilers designed such that fault currents do not pass through the pressure vessel, and the pressure vessel is electrically isolated from ...
424.85 Equipment for General Use, Grounding
Boilers designed such that fault currents do not pass through the pressure vessel, and the pressure vessel is electrically isolated from ...
425.85 Equipment for General Use, Grounding
Boilers designed such that fault currents do not pass through the pressure vessel, and the pressure vessel is electrically isolated from ...