The problem of saddle warping in the installation of horizontal equipment
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Dear sea friends, recently in the installation of horizontal equipment, the installation company has repeatedly reported an issue where the saddle at the sliding end of the horizontal equipment does not fit properly with the foundation pad. At the time of manufacture, the bottom plate of the saddle is allowed to have a certain degree of inclination (up to 6mm); the fixed end is leveled using shims, but what should be done in the case of the sliding end, which has a foundation pad? Is it to add shims under the backing plate so that the backing plate also tilts? Is local warping due to copper gasketing? What should be done for those with steel beams as the foundation? Add longer shims at the gap? Steel beams are the worst. . . Is it possible to adjust the fixed end based on the sliding end, as long as the deviation allowed for equipment alignment is respected? It’s easy to adjust when the fixed end is just a shim. . . The bottom plate of the sliding end saddle does not fit against the foundation pad: The saddle bottom plate does not fit against the steel beam:
Horizontal containers are calculated based on a model in which the supports are horizontal; if the supports are not horizontal, then the bending moments at each support will be different. Therefore, the level of each support surface for horizontal containers should be adjusted as much as possible. As shown in the diagram, this situation is likely caused by deformation during welding; it should be a manufacturing-related deformation issue. Now the support has taken shape. This type of support should be subjected to secondary grouting. If the deformation is permanent, there should be no problem with handling it this way.
Another point to note is that if the medium is a liquid, the outlet side should be set slightly lower. What you mentioned is to use the sliding end as a reference; adjusting the fixed end is part of the installation and alignment process, and there’s no problem with that at all. After installation and alignment, the anchor bolts securing the fixed saddle are fastened with one nut, while those securing the sliding saddle are fastened with two nuts: after tightening the first nut, it is turned back one turn before the second nut is used to secure it. That’s generally the process.
Some good suggestions for secondary grouting on the second floor as well
This is a sliding end; it’s not possible to use secondary grouting for leveling, and the base has to be placed on a pad, which is quite troublesome.
The sliding end also has a lower base plate, which must be fixed and leveled on the foundation rebar during secondary grouting. Leveling is about ensuring that a horizontal container is level; once the container is level, you can add whatever padding is needed.
In other words, the base pad of the sliding end should move along with the saddle bottom plate, rather than being horizontal in a straightforward sense?