In addition, it is introduced that the layer, impurities and band structure in base material are harmful to the weld quality of ERW steel pipe.
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。
During the production of ERW steel pipe 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。
The basic structure, key functions and purpose and application features of erp system used for longitudinal ERW steel pipe-making enterprises are studied.
研究了直缝erw钢管生产企业ERP系统的基本结构、主要功能及该系统的作用和应用特点。
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