XCMG's regional description positions the XR138E family for industrial and civil foundations, including smaller building and power-tower projects. The rotary drilling platform should be configured around the required pile diameter and depth. The Kelly bar and drilling tool arrangement are important parts of that selection because they connect the machine's working capability to the ground being drilled.

For urban building sites and utility foundations, the rig's role is to establish the bore required by the foundation design. Ground conditions, access for supporting equipment and the spoil-handling sequence should be reviewed together. This gives a contractor a practical basis for evaluating the XR138E without assuming that every regional configuration has identical capabilities.