From a thermodynamic perspective, pipelines generally suffer significant damage under six different conditions. Depending on the current operating parameters, the standards for different pipelines may undergo significant changes in the methods of damage. When pipelines are equipped with valves, the methods of damage may differ significantly from those of pipelines. From a thermodynamic perspective, different methods of damage can be considered.
The standards and practical damage methods for pipelines may change, and when valves are installed in pipelines, they may present a different method than polyurethane insulation pipes. The primary unrestricted shaping activity occurs when some internal pressure in the pipe wall generates a circumferential stress. If the circumferential surplus occurs, it will cause the insulation pipe of the steam buried steel sleeve to exhibit unrestricted shaping activity.
There is another situation where deformation can occur, which is the deformation caused by cycling.