螺旋焊管微扩口分析

Analysis of Micro-flaring of Spiral Welded Pipe

为解决小口径螺旋焊管接口内防腐问题和实现承插钢管的制造,需要将厚度≤10mm的螺旋焊管管端微扩口,微扩口时钢管管端会发生冷作硬化现象,其力学性能会发生变化,同时扩口率数值和壁厚变化会影响钢管的使用,需要对设计范围予以规范。

In order to solve the problem of anticorrosion in the interface of small diameter spiral welded pipe and to realize the manufacture of socket pipe,it is necessary to make the spiral welded pipe end with thickness less than or equal to 10mm,and the cold work hardening will occur at the end of the pipe,and the mechanical properties will change,and the value of the flaring ratio will affect the use and installation of the steel pipe.The design range of flares should be standardized.