在泵站等设施的工艺管道安装或大修改造过程中 ,小口径管道安装工艺复杂 ,短管连接多 ,一般都是将长管用气割等方法切断后再用割炬割出坡口 ,用砂轮机磨光其表面后进行焊接。尤其是大修或改造时 ,原管道内的介质残留物等接触明火后容易发生事故 ,且加工后其管口斜边和钝边难以? In the process of installing or overhauling the process pipe in facilities such as pump station, the installation process of small-diameter pipe is complicated and many short pipes are connected. Generally, the long pipe is cut by means of gas cutting and then cutting the groove with a torch, After polishing the surface of the welding. In particular, overhaul or renovation, the original pipeline of media residues such as exposure to open fire prone to accidents, and its processing after the bevel and blunt edge difficult?