The Purchaser, restricted by an internal floating roof, or controlled to allow for seismic wave action. = is the height from the bottom of the course under consideration to the top of the shell including the topĪngle, if any to the bottom of any overflow that limits the tank filling height or to any other level specified by Tt is the hydrostatic test shell thickness (mm and inches)ĭ is the nominal tank diameter (m and ft) Td is the shell design thickness (mm and inches) In United States Customary System (USC) units The minimum thickness of the shell of a reconstructed tank, is given by the following formulas found in Formulas for the calculation of Minimum Thickness for Reconstructed Tank Shells We have seen an advance to this issue in the article we had on calculating joint efficiencies, but we will have a further look to the formulas that appear there. The inspector should be able to:Ĭ) Calculate “ td”, design shell thickness (API-650, 5.6.3.2, for tanks of 200 foot diameter and smaller)ĭ) Calculate “ tt”, hydrostatic test shell thickness (API-650, 5.6.3.2) The inspector should be able to determine the minimum thickness of the shell of a reconstructed tank. The book of knowledge says this about reconstructed tanks: Today we will make some practice exercises on determining thicknesses for reconstructed tanks Last time we saw the basics of shell calculations for reconstructed tanks.
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