在现代锅炉、原子能动力设备、石油化工容器等装置中,日益广泛地应用小R半径弯头。采用小R弯头可以使整个装置紧凑,大大地减小配管空间。在许多情况下,如果不采用小R弯头,会给设计工作带来难以想象的困难。所谓小R弯头,是指管子的相对弯曲半径Rx(Rx=R/D<1.5)的弯头,此处R为要弯制的半径,D为管子外径,制造小R弯 In modern boilers, atomic power equipment, petrochemical containers and other devices, the increasingly widespread use of small radius R bend. The use of small R elbow can make the entire device compact, greatly reducing the piping space. In many cases, if you do not use a small R elbow, the design work will bring unimaginable difficulties. The so-called small R elbow, is the relative bending radius of the pipe Rx (Rx = R / D <1.5) elbow, where R is the radius to be bent, D is the outer diameter of the pipe, the manufacture of small R