The valve clapper shall withstand exposure to hydrostatic pressure of two times the rated working
pressure. During and at the conclusion of the test, no fracture, permanent distortion, or functional impairment
shall occur. After this test the valve shall be fully operable and shall comply with the leakage
requirements in either Section 4.3 (Resilient Seat Leakage) or Section 4.4 (Metal-to-Metal Seat Leakage),
as applicable.