Drawoff sump can cut Lap-Welded Bottom Joint?

[J.Lukass]

Hi, I have a doubt about drawoff sump.

In a gasoline storage tank, the bottom is being changed (rectangular shaped plates) and the axis of the new drawoff sump coincides with a joint. Is possible cut the joint and place the drawoof sump? (see the image). I read API 650 and API 653 but not find nothing. Thank you very much.

 

[IFRs]

Yes it can. While the codes are silent on this specific issue, you can use normal bottom weld spacing criteria. Your sketch looks good.

 

[JStephen]

If you think of it ahead of time, it's preferable to avoid the situation, but not prohibited.
If you have a cone-down bottom with sump at the center, you'll almost certainly have this situation.

 

[J.Lukass]

Thanks a lot!!