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不锈钢焊管管端矫正方法及所使用的装置

发布时间:2020/5/19 11:11:13人气:411

  不锈钢焊管成型过程中的管端不圆度和管径偏差控制一直是不锈钢焊管生产中亟需解决的问题,美国石油学会(API)标准规定的管端不圆度允差为管径的±1%,对于大口径管来说,这个标准过松,如φ529mm的不锈钢焊管,管端不圆度允差为±5.29mm,这样的管在管端倒棱时,管端横截面长轴处的棱边部分会自然消失,在野外配管焊接施工时,很难将两管对焊在一起,即使能对焊在一起,也会产生很大的残余应力,从而使焊缝处机械强度和抗腐蚀性能明显下降,造成了管道在使用过程中的不安全性,因而管端矫正成为必要。

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