Welded Steel Tanks for Oil Storage - Home - My Committees
Nominal Thickness Greater Than 13 mm (1/2 in.) 3-4. 3-4A Shell Manhole 3-14. 3-4B Details of Shell Manholes and 3-14 Rectangular Roof Openings with Flanged Covers 3-37. 3-15 Rectangular Roof Openings with Hinged (3 inches) several inches beyond the outer periphery of the foundation ringwall and then turn down at its outer diameter. 4.