If the spools have been, as you say, forcibly fitted up prior to welding, chances are (good chances, by the way) they will transmit the stress to the equipment they will be connected to, like pumps, vessels, tanks etc. This is unacceptable, no erection instruction manual will allow it. In the case of rotating equipment, you won't be able to align it.
Giovanni S. Crisi
Sao Paulo - Brazil