I'm here to help with welding gaskets.
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It's been a long time since I've been here. I'm sorry that I came here to ask for help today! The company recently had an overhaul. The gasket of a devolatilizer is a welded gasket. The material has been tested to be close to 18-8. The container needs to be removed. How to remove the welded gasket? It is welded to the container and it needs to be reused. It is really a headache. I wonder if any of my friends have encountered this situation before, and they have to check for helium leaks after installation. I have never heard of it. Dizzy!
What is the "welded gasket" that the poster mentioned? Is it the lining ring (backing plate) that lines the inside when the head and barrel section are welded? This structure would be used if welding could not be performed from the inside. If it has such a structure, the inner diameter of your equipment will not be too large. To remove the sealing head, just cut it directly along the weld and cut it together with the backing plate. Generally, when the manufacturer manufactures, the backing plate and the cylinder will be connected first. Fix, and then assemble the head. The backing plate and the head side are not fixed at all. Now you only need to cut off the tight welds and process the welds. The backing plate that is fixed with the cylinder can be polished to a fixed position with a grinder and knocked off. Helium leak detection is also common in manufacturing plants. You can refer to Appendix A of HG 20584-1998 Manufacturing Technical Requirements for Steel Chemical Containers. Wherever you fail, everyone will give you a thumbs up! ! Thanks!