Selection of the maximum piping diameter for floating-head heat exchangers
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I am designing an internally guided floating-head heat exchanger with an engineering diameter of 500. In accordance with the requirements specified in GB151, I have set the maximum pipe layout diameter at 465. I don’t have any practical experience in this area. Using HTRI for calculations, the value obtained for the TEMA standard zone is 480. I would like to discuss this with everyone – generally, in such cases, does one use the values specified by national standards, calculate them oneself (using some empirical formulas as well), or opt for other methods?
I usually use the values specified by national standards, taking into account the actual circumstances. It seems impossible at 480.
The poster needs to select the design standards first. If you are designing in accordance with GB151, then use GB151 to determine the maximum piping diameter!
When you use htri for calculations, the diameter you enter is used by the software to determine the inner diameter. So there will be more; change the input shell diameter to the actual internal piping layout, and the number of pipes calculated in this case is one that can be actually manufactured. This post was last edited by xlwhide on 2009-4-3 18:09]
For heat exchangers with a diameter greater than 400, the general engineering diameter refers to the inner diameter
I think there should be a unified standard for design and calculation!
TEMA-Recommended Baffle-to-Shell Clearance: Nominal Shell ID, in(mm); Shell ID – Baffle OD, in(mm): 6-17 (152.4-431.8), 0.1250 (3.175); 18-39 (457.2-990.6), 0.1875 (4.7625); 40-54 (1016-1371.6), 0.2500 (6.35); 55-60 (1397-1524), 0.3125 (7.9375). What is the value of Baffle OD – Heat exchange tube OD = Maximum pipe layout diameter? !