The nominal thickness of the butterfly head is 4 millimeters thicker than that of the cylinder body – how should it be welded?
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Material: Q345R; design based on SW6-2011 standards. The nominal thickness of the butterfly head is 4 millimeters greater than that of the cylinder. The inner diameter of the cylinder is 3000, with a nominal thickness of 10 mm; the inner diameter of the butterfly head is also 3000, but its nominal thickness is 14 mm. So how is welding carried out in this case? Should the cylinder thickness also be changed to a nominal thickness of 14, in order to keep these two thicknesses consistent?
The last edit to this post was made by HSLJHZ on 2015-8-6 at 11:28. To keep these two thicknesses the same, the thickness of the cylinder can also be changed to the nominal value of 14, or the cylinder can be surfaced welded to reach 14 thickness.
This post was last edited by why20092010 on 2015-8-6 at 16:30. OP, what are the design conditions: pressure and temperature? Generally, the thickness variations for thin-walled calculation cylinders and heads aren’t that large; factors such as head forming and thinning are simply taken into account. I just want to know, haha!
The head cannot be thinned down, right? Will the calculations still work?
It is also possible to add a transition section to the cylinder, and the cost will not be too high.