Methods for calculating weld strength and weld dimensions
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Dear friends, I have been working on equipment recently, specifically on the spherical head and flange weld seams of the floating head heat exchanger’s floating head cover, as shown in Figure 1. How can the strength of these weld seams and their dimensions be calculated and determined? Instead, corresponding clamping and pressing fixtures were developed, as shown in Figure 2. How is the weld strength of the cylinder and the equipment flanges (self-made) calculated, and how are the weld dimensions determined? Thank you! ! I really want to learn*! ! Eager to learn! !
Pressure: 3.2 MPa; medium is flammable and explosive
Regarding the material loading requirements, the structure, manufacturing, and testing shall be carried out in accordance with GB151 – there should be no problems with that!
151 does not specify in detail the dimensions of the welds (weld leg height, length, groove angle, etc.)
Learning*, learning*. Thank you to the original poster.
Personally, I think it is possible to refer to joint J10 for welded structures in Chapter 18 of standard HG/T20583-2011. As for the verification of fillet weld strength, it is not covered in GB/T150. In my opinion, the reason for not including it is that by controlling the thickness of the weld legs in the welded joint, as long as the thickness is not lower than that of the thinnest component, there will be no problems; at least 6 mm is required to ensure sufficient strength.
Hey, could you help me explain this? I found this chart on 151, but I can’t understand it. Which part is used to calculate the weld strength, and how do I determine the weld size? Thank you! !
Dear, I have checked this joint. For the welding structure of joint J10 (the weld connection between the cylinder and the spherical head), firstly, the dimensions of the equipment flange and the spherical head do not meet those specified for this structure; secondly, the value of δS that I used is based on the distance from the flange bolt holes to the outer edge – I’m not sure if this is correct
Simulate and calculate the cylinder thickness using your design parameters, then add a corrosion margin; round off any negative deviations in thickness to use as a reference for δS