Hello,

My customer has build a 96 Meter long vertical stainless steel pipework for High Rise Building which is now having leaks on flanges
on the branch piping.Flow Medium is water at room temperature.

They have provided an Anchor at the bottom of pipework and Guide (U-Bolt) at every 3 meters on the remaining vertical portion.
The Pipework is having a DN 100 for the first 50m and remaining portion is DN 80 Pipe. Entire pipe thickness is 1.5 mm.(Trubore pipe)

As per my Caesar-II run check of this pipework, the sustained stress developed is 95 % and there is a downward displacement of 3.8mm observed in the sustained Condition.

My conclusion is that because this is a thin walled pipe, there buckling due to the self-weight of the large pipe. This is causing higher bending stress on the branches due to the downward pipe movement of the pipework.


1. Could you please tell me if this understanding is correct?

2. In Practice, is there a particular height limit for which we can keep building a tall pipe work with just one anchor at the bottom?


Kind regards
Ajmat