Dear Friends,

We have a steam pipeline running long distance.....We are getting around 900 mm of displacements near the loop bends. System is well within the allowables for expansion stresses. We are using ASME B31.3 & material is API5LX60/65/70/80

The concern is:
1. With such high displacement values, whether this piping will come back to its original position after first shut down?...
2. If this line could not come back to its original position then will there be any kind of pre-stresses/residual strsses in the pipeline & will it cause any problem in the behaviour of piping if the line is re-commisioned second time....

Your valuable thoughts may help us to take care of more considerations.

Thanks for your time.