flood plate
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When axial inlet nozzles are used on the tube side of the heat exchanger, and these nozzles are located close to the tube sheet, is it necessary to install anti-scour plates to prevent erosion of the welds on the heat exchange tubes?
The heat exchanger’s tube side uses an axial inlet, and an anti-scour plate needs to be installed~~
Yes, but some shell sides also require anti-scour plates.
This post was last edited by ylb913 on 2018-8-29 at 20:39. The original poster said that the description of the operating conditions is clear enough, but it’s not clear whether it is based on the actual conditions on site or just a simple assumption In this case, a surge plate should not be necessary; rather, the depth of the tube bank should be designed reasonably to ensure an as optimal as possible distribution of the fluid. ——Upon reviewing the previous replies from netizens, I realized that I might have misunderstood things; however, I will not make any changes to those potentially incorrect understandings and replies. Is it the shell side inlet that is closer to the tube bundle? This is generally not an issue, as it doesn’t allow too great a distance ； I have very vivid practical experience of the problem where corrosion of the inlet nozzles occurred due to backflow caused by the anti-backflow plate at the shell-side inlet; ultimately, the issue was resolved by upgrading the material used, rather than by changing the design of the heat exchanger.
I work at an oil refinery, in the process engineering field. For heat exchangers, the axial inlet is used on the tube side; I’ve only seen this design in shell-and-tube heat exchangers. I haven’t paid attention to whether there are any anti-backflow baffles, as such heat exchangers are usually kept sealed due to technical confidentiality reasons.
The old 151 with axial inlet requires additions; the new version includes medium conditions to take into account the erosion effect of the fluid on the pipe ends. A comprehensive judgment based on the medium and flow is required. If there’s enough space, you can add that; it’s always a good precaution. If there is abrasion and no space for impact protection, it is recommended to protect the surface of the tube sheet. The insulation layer on the high-temperature heat exchange organ plate can be used as a reference.
Yes, some shell sides also require anti-scour plates.
OP, are you sure it’s axial and not radial?