Is it possible to weld carbon steel reinforcement rings outside the cylinder of stainless steel equipment?
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Welded reinforcement rings, in the form of angle steel, are installed outside the stainless steel heat exchanger shell. Can these carbon steel reinforcement rings be welded directly to the stainless steel shell?
Direct welding is possible, but considering the different thermal expansions of stainless steel and carbon steel, it is better to use stainless steel angle brackets. If purchasing them proves difficult, stainless steel materials that can be joined together to form a T shape can also be used as an alternative.
After welding stainless steel and carbon steel, you need to consider the issue of corrosion
Is there any standard that requires the reinforcement rings of stainless steel equipment to be made of stainless steel?
This post was last edited by gn_1984 on 2018-5-9 at 10:32. It is best for the original poster to use stainless steel; welding the same type of steel together will definitely yield better results than welding different types of steel together. Special attention should be paid, especially to equipment operating at high or low temperatures.
The main concern now is whether there is any standard that requires the use of the same or similar material for the reinforcement ring, and what is the basis for this?
It can be welded, as long as the process evaluation is successful
The standards don’t prohibit it, but considering mechanical properties and corrosion resistance, the same type of steel is definitely better.
It can be used, but try not to use it. If it is absolutely necessary, a ring of shims can be installed to prevent the quality issues that may arise from welding different types of steel on the cylinder
It is completely possible, but construction must be carried out in strict accordance with the technical specifications.
There are no explicit regulations prohibiting it; for example, it is quite common to weld a carbon steel jacket around a stainless steel inner cylinder. The key is to choose the appropriate welding materials and to have a qualified PQR