Steam pipeline
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This post was last edited by lazybones_DLCJ on 2019-1-16 22:03; 15CrMo is used in place of 20# steel for 0.2MPa steam pipelines
Just in terms of the material, substitution is no problem; it is also necessary to consider whether the wall thickness is appropriate. Also, what is the temperature?
15CrMo is used only in high-temperature and high-pressure steam applications due to its excellent properties. It can certainly be used with steam at 0.2 MPa as well; however, it is necessary to choose the appropriate materials for the flanges and elbows used in conjunction with it, otherwise welding problems may arise
High can replace low, but it is necessary to consider whether different materials can be welded together; low generally cannot replace high. Basic approach.
The material is fine; it can be reused.
Welding tends to have problems; the welds made from 15CrMo material here fail the inspection
For higher generations, the cost of materials is not a concern, but the construction costs will increase.
Sure, but be sure to weld it properly
Steel grade 20 is sufficient; using stainless steel is even better, as long as the pipe parameters meet the requirements