前言内螺纹管是一种内壁加工成螺旋线的无缝钢管,它主要用在大容量电站锅炉的水冷壁上。与通常所用的光管相比,它能在高热负荷运行条件下保持核沸腾状态,从而避免发生膜态沸腾,防止管子烧坏。现在内螺纹管大致可分为小直径单头内螺纹管和中直径多头内螺纹管两种。前者用超硬车刀在管子内面切削而成,后者则用特殊形状的工具冷拔加工制成。该内螺纹管为 Introduction The female pipe is a kind of seamless steel pipe whose inner wall is processed into a spiral. It is mainly used in the water wall of large-capacity power station boilers. Compared with the commonly used light pipe, it can keep the nuclear boiling state under the condition of high heat load, so as to avoid membrane boiling and prevent the pipe from burning out. Now the female pipe can be roughly divided into small-diameter single-head female pipe and medium-diameter multi-head female pipe two. The former is made by cutting the inner surface of the pipe with a super-hard turning tool, and the latter is made by cold-drawing a special-shaped tool. The female pipe is