The paper mainly simulates the producing process of tubes of small diameter , medium diameter and big diameter . it uses a terminational simulation method to study the producing capacity of these three types of tubes , the using rate of the machines and the occupying state of the machines " buffer - ins of the production line 论文针对小口径、中口径、大口径的高压锅炉管的生产过程进行终止型仿真，得到精整线加工这三种型号钢管的加工能力，各机组的利用率，各机组输入缓冲区的占用情况。
