What to do if there are scratches on the flange sealing surface
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Design pressure: 0.5 MP; the medium is non-toxic and not flammable or explosive. Equipment flange where the cylinder meets the upper head: there is a radial through-going scratch, less than 0.5 mm deep; it features a raised surface for sealing – I’m not sure what to do about it There are also several minor defects in various locations, which have been repaired by TIG welding; none of these defects are radially penetrating. What should we do next? Okay? ?
Also, regarding such issues, what are the relevant guidelines for handling them, such as existing experience in handling them?
Such minor scratches can be removed through machining
How should it be machined? Should the sealing surface be turned again or something similar?
Cases where the depth is not very great can be machined again! If it’s too deep or the scratches are large, weld it first and then machine it on the vehicle
Use gaskets with high elasticity, apply graphite powder at the through scratches and defects, and tighten them. If it leaks again, if its value is high, it can be rewelded and processed on a lathe; if the cost is not high, replacement is preferred.
Highly elastic gaskets can be used, or the material can be shaped by hand filing. If it still cannot be sealed, machine processing or replacement can be carried out
If the pressure level is not high, it can be filled with a adhesive of good strength and then smoothed out; for higher pressure levels, welding repairs should be carried out. It also depends on the location and size of the scratch; each case needs to be handled accordingly.
It can be reworked on a lathe, but strictly speaking, it should be returned.
Design pressure: 0.5 MP; the medium is non-toxic and not flammable or explosive. Equipment flange where the cylinder meets the upper head: there is a radial through-going scratch, less than 0.5 mm deep; it features a raised surface for sealing – I’m not sure what to do about it Penetrating injuries must be addressed; one can first place the part on a lathe to machine the originally damaged sealing surface, and then re-create the water ripple pattern. There are also several minor defects in various locations, which have been repaired by TIG welding; none of these defects are radially penetrating. What should we do next? Okay? ? For small punctual defects, if they do not penetrate the sealing surface, they can be ignored; if they are deeper, welding repairs must be carried out followed by appropriate treatment to ensure the proper roughness of the sealing surface.
Flanges like the one you mentioned, based on the shape of the defects and the degree of deviation, should be considered defective products in accordance with the standards for purchasing material components and relevant specifications, and should be returned or replaced.