We have this Hot Oil line (Temp = 410 C) which has a support that strangely lifted. We already checked all possible reasons for this support to lift but we cant find the real reason. Hopefully some of you have encountered this kind of pipe behavior.

1. Support is not lifting in our calculation.
2. No thermal bowing since this is hot line
3. As per process engr, line is not subjected to AIV, FIV, Surge, Slug.