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Visually inspect all internal roof penetrations <br /> 4.2(h) for corrosion,wastage, and general X <br /> degradation. <br /> 4.2(i) Inspect all internal roof penetrations welds for X <br /> cracks, pinholes, and structural integrity. <br /> UT inspect roof pipe columns for pipe internal <br /> 4.2(�) X External Only <br /> corrosion. <br /> Floating Roof Visually inspect and hammer test deck plates. <br /> Inspection ( In sour service, inspect all deck plates weld X <br /> 5.1 (a) seams for cracking unless the lower laps have <br /> Roof External been seal welded. ) <br /> Page No.6 of 7 <br />