Connection weld between the flat cover and the cylinder body
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For the weld joint between the flat cover and the cylinder, how should the weld joint coefficient be selected?
If it is a butt joint, the welding joint coefficient shall be determined in accordance with Article 4.5.2 of GB150.1. But what is the welding joint coefficient for the weld connecting the flat cover to the cylinder body used for? Both the calculation of the flat cover thickness and the calculation of the cylinder thickness should be independent of the weld joint coefficient of the weld connecting the flat cover and the cylinder.
The weld joint coefficient refers to that of the longitudinal welds; it is not necessary to use a weld joint coefficient for the circumferential welds that connect the flat cover to the cylinder. Clause 4.6.2 of GB150.1 is also established in this way to calculate the axial tensile stress in the shell of fixed-plate heat exchangers.