一、圆风管无法兰联接无法兰联接的方式具有许多显著的优点: 1.节省制作圆法兰的大批角钢和大量人工。 2.省去铆法兰这一繁重的工作,同时不再需要将风管劈边。 3.节省大批联接法兰用的螺栓和安装工作量。因此,最近我们对它进行了反复的试验和改进,基本上确定了一种方法,开始逐渐地在工程实践中采用。目前这种方法可采用的范围大致上是这样的: First, the way that the round wind pipe can not be coupled with the blue joint can have many significant advantages: 1. Save a large number of angle steels and a large amount of labor for making circular flanges. 2. Eliminating the heavy work of riveting flanges, it is no longer necessary to wind the ducts. 3. Save bolts and installation workload for large quantities of coupling flanges. Therefore, recently we have repeatedly tested and improved it, basically determined a method, and gradually began to use it in engineering practice. The scope currently available for this method is roughly the same: