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楼主 |
发表于 2018-1-4 08:34:37
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Anti-corrossion overlaying. But is there any requirement for the tube-to-tubesheet weld parent matal? For instance, the cladding material of the tubesheet is E309MoL(transitional layer) and E2594(surfacing layer). Is there any requirement for the overlaid material that has to be overlaid with the same welding method? |
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