I am involved with a project that involves replacing the wye block on a main steam system that has piping that is cold sprung piping.

The piping system consists of a main riser coming down from the boiler connection. The riser is anchored in x-y-z direction but not rotation. At the bottom of the riser is a forged wye block. The piping exits the wye block at 45 degrees from the vertical. The two pipes continue to diverge from each other and also bend (approx 5D) to the horizontal. The horizontal pipes continue to the main steam stop valves. There are cut short lengths in both the vertical riser and the horizontal lengths of pipe.

The project will involve cutting the wye block out of the piping system. But before I do that I need to design and install restraints the will hold the piping ends in their relative positions when the wye block is removed and not allow them to spring back out of position.

I have a model showing the existing piping, including the cut short sections. I will add restraints to the model. I need to develop output from Caesar that will show the pipe ends are not moving when the wye block is removed.

Suggestions?