Plug welding
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A stainless steel plate is placed on the bottom plate of a certain device; is it possible to connect the stainless steel plate to the bottom plate using plug welding? If so, what should be the spacing between the plug welding points?
Plug welding is a type of welding process; for example, it can be used to join flat plates together, or in areas where bolts or rivets are used for connection – plug welding provides a solution for such situations! 1. Plug welding belongs to the category of fusion welding, and it is typically used when the thickness of the workpiece and the amount of misalignment are significant; based on relevant experience, it is suitable for plate thicknesses of 12 mm or more. 2. Plug welding can also be used in the \"rework of spot welding\"; holes are made in the plates that require rework, and plug welding is applied to enhance the welding strength. As for what the original poster meant by “what should be the spacing between the solder joints,” I’m not sure; isn’t full welding used between the stainless steel plate and the base plate?
There is no requirement for the spacing between solder joints; it can be determined based on design considerations.
Plug welding is an option; the spacing should be determined based on actual conditions. First, it is necessary to ensure that the stainless steel plate and the lining plate are in close contact after plug welding – welding deformation can cause the steel plate to warp, creating a gap between the two plates, so more plug weld points need to be added to keep them in contact. Second, the stress conditions must also be taken into consideration to verify that they meet the requirements.
The plug welding spacing for our vacuum equipment is 350–450 mm; the exact value depends on the actual conditions. Generally, higher requirements are placed on plug welding in vacuum environments, as the weld points are subject to considerable stress
The poster mentioned that a stainless steel plate is used as a lining on the bottom of the container, which should be a type of composite steel plate. The two can be joined by plug welding. As for the spacing of the seam welds, it can be designed by oneself, with close proximity between them being advisable.
Room temperature ≤ 300, 100°–250； 150——200, and so on. Severe alternating temperature ≤100. The plug welding holes are arranged in a T-shape. The plug weld holes must not be located on the welds of the lining, and the distance between them must be at least 30 mm. Leak detection holes (M10) should be provided in the splice lining, and air leakage testing shall be carried out: Weld joint spacing, air pressure in MPa – 100: 2; 150: 1.5; 200: 0.5–1
Hehe, I happen to need it today:P
If the stainless steel sheet lining the base plate is too thin, plug welding can easily fail to penetrate the stainless steel sheet, making it difficult to control the quality of the fit. Composite panels should be the better choice. Alternatively, the thickness of the stainless steel plate used as a lining can be increased, which improves the quality of the plug welding; however, the overall strength (with the thickness of the lining plate and the base plate remaining unchanged) may decrease