Come in and discuss weld classification together. . . . . .
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Let’s discuss this together – how should the welds between the jacket and the cylinder be defined? Let’s discuss it. . Should the jacket be classified? If so, which type of weld does it belong to? 、、、、Is Class E weld sufficient?
We use this jacket quite frequently; there are requirements regarding the internal welds between the jacket and the equipment, but we didn’t pay attention to the classification.
I think it’s a Class C weld; the jacket overlaps the cylinder
The jacket itself is considered a pressure vessel, so it certainly is not of Category E. In fact, in terms of stress distribution, this weld is very similar to the small end of the conical shell, and should be classified as Category B. However, since it is a fillet weld, I think it is most likely to be classified as Category C, similar to the last weld between the tube sheet and the shell in a fixed-tube-sheet heat exchanger. I’m not sure if this is correct; please correct me.
It should be classified as Category C; as for Category E, it shouldn’t be counted.
Are you referring to the welding of the jacket and the inner cylinder? It should belong to Class D welds...
It should be classified as a Class D weld; it cannot be considered a Class E weld
Your analysis is correct; it is a Class C weld joint
Personally, I think it might be possible to use the information regarding the lap joint between the inner head and the cylinder as a reference for making a judgment; the circumferential weld between the jacket cylinder and the inner cylinder belongs to Category C joints
Classification of welding seams between the jacket and the cylinder: If the jacket is not classified, it should be considered an E-class weld seam. If classified, the jacket should belong to Class D welds. The inner cylinder can be regarded as a pipe, while the jacket can be considered as the shell.
H-weld categories are classified according to the type of stress applied to the weld. Cladding welds are subjected to prestress and axial tensile stress, so they should be classified as Category B, right?