Issue with the upper size limit for S30408 material in SW6
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When designing a fixed-type heat exchanger, why is the maximum dimension for the S30408 material in SW6 limited to 80 mm? I need a tube sheet with a thickness greater than 80 mm; is it not suitable or not recommended to use 304 material for thicknesses over 80 mm? If I need to add a pressure vessel compensator (U-shaped expansion joint), but fixed heat exchangers only come equipped with corrugated expansion joints and Ω expansion joints, which one should I choose? Additionally, for the heat exchanger I designed, it is required that there be no baffle plates in the shell side, and the tube length is 24,000 mm. Anyone who has encountered such a situation could please offer some advice.
It’s likely that the material category wasn’t selected correctly; try using forgings – generally, a length of 300mm can be achieved. In the absence of baffle plates, support plates generally need to be installed; otherwise, the requirement for the maximum unsupported span cannot be met. For a length of 24m, it depends on the inner diameter of the equipment; it’s possible that the stiffness of the cylinder may not be sufficient, which would require the use of multiple saddles. Expansion joints may be necessary, depending on the calculations.
It’s likely that the material category wasn’t selected correctly; try using forgings – generally, a length of 300mm can be achieved. In the absence of baffle plates, support plates generally need to be installed; otherwise, the requirement for the maximum unsupported span cannot be met. For a length of 24m, it depends on the inner diameter of the equipment; it’s possible that the stiffness of the cylinder may not be sufficient, which would require the use of multiple saddles. Expansion joints may be necessary, depending on the calculations.
U-shaped expansion joints are also available. When adding expansion joints, if the customer does not specify otherwise, and U-shaped expansion joints, bellows expansion joints, and Omega expansion joints all meet the requirements, then of course the one that is cheaper should be used.
It seems like the sheet metal usage has exceeded the limit, but there’s no limit on forgings
The maximum size for forgings is 300 mm; forgings are generally used for things like tube sheet flanges.
If you choose forgings, there will be no problem. Since the thickness is over 80 mm, the tube sheet of this heat exchanger should be made of forgings
The sheet standard is only up to 80mm. . .
Thank you! We should choose forgings! It seems that to keep the shell side unobstructed, we’ll have to try using U-shaped expansion joints!