When calculating the tube sheet in SW6, should 0Cr18Ni9 be entered for the heat exchange tubes, or S30408?
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When calculating SW6, should 0Cr18Ni9 be entered for the heat exchange tubes, or should S30408 be used? Since the allowable stresses for S30408 and 0Cr18Ni9 are different, which standard should be applied in each case?
In SW6, 0Cr18Ni9 should still be entered, as the allowable stresses for the two materials are different. SW6 assumes that S30408 refers to welded pipes, while 0Cr18Ni9 refers to seamless pipes. In fact, in the standard NB/T47019.5 referenced for heat exchange tubes, the tube steel grades are also specified by their grades rather than numerical codes.
This is a design-related field, and I have some knowledge of the market trends for materials. But thanks to the original poster; it has allowed me to learn a lot of professional knowledge:victory:
The input should meet the standards of the actual materials used
Sometimes, it is acceptable to allow some differences, because the design includes a certain safety factor