Thickness of Tray Parts

Thickness of tray parts is usually determined by the corrosion- and erosion-resistance requirements and material used. Thicknesses are usually specified in sheet-metal gages. 

Minimum deck thickness is usually 14 gage (0.0747 in) for corrosion-resistant alloys and 10 gage (0.1345 in) for carbon steel (88, 137, 211, 399). The latter typically provides a corrosion allowance of 64 in for the top side or bottom side (137). A corrosion allowance of Vie in is recommended for major support beams constructed from carbon steel none is usually required for alloy construction (399). 

The greater the tray thickness, the lower the dry-tray pressure drop in sieve and valve trays (88, 226, 257, 409). It is commonly believed 

TABLE 7.2 Minimum Recommended Sheet Metal Thicknesses for Tray Parts 

When tray thickness is determined for sieve trays, hole diameter should be kept in mind. A thick plate may require larger holes because of the restrictions on hole punching (Sec. 6.3). 

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