During the Spiralweldedpipe production, the main reasons of manual bend caused in strip steel are unusual aline of strip steel in strip steel connection weld process.
在螺旋焊管生产过程中，钢带产生人为硬弯的主要原因是对头焊工序中钢带不能对齐所致。
2
The results of batch manufacture grade X80 spiral and longitudinal submerged arc weldedpipe all meet the pipe technical conations required by"Grade X80 Pipeline Steel Pipe Application Project";