双金属复合管在现场安装时，管道与管道中心线要对正，必须确保管道两端面对接准确。
When bimetallic composite pipes are installed on site, it is necessary to ensure that the two ends of the pipes are facing each other accurately in order to align the pipes with the central line of the pipes.
而且由于我们内衬高铬合金硬度高，只能对外壁的普通钢管进行焊接，而且是必须焊透。在现场切割时，必须根据复合管的厚度，选用等离子切割机进行现场切割。
Moreover, because of the high hardness of the high chromium alloy lining, we can only weld the ordinary steel pipe on the outer wall, and it must be welded through. In the field cutting, the plasma cutting machine must be selected according to the thickness of the composite pipe.