In addition, it is introduced that the layer, impurities and band structure in base material are harmful to the weld quality of ERWsteelpipe.
另外介绍了母材缺陷分层、夹杂物、带状组织对ERW焊缝的危害性。
2
During the production of ERWsteelpipe mill, the size of steel of strip hard bent influences the running of pipe welder and the quality of the pipe.
在ERW焊管机组生产中，带钢的硬弯大小直接影响焊管机组的正常运行及焊接钢管的质量。
3
The basic structure, key functions and purpose and application features of erp system used for longitudinal ERWsteelpipe-making enterprises are studied.