After welded pipes are treated by reducing tension mills known as "welded pipe seamless process". There are still some differences between welded pipe and seamless pipe in quality index.
焊管经张力减径机处理后有人称之为“焊管无缝化”，这种焊管与无缝钢管在一些质量指标上仍存在差异。
After welded pipes are treated by reducing tension mills known as "welded pipe seamless process". There are still some differences between welded pipe and seamless pipe in quality index.
焊管经张力减径机处理后有人称之为“焊管无缝化”，这种焊管与无缝钢管在一些质量指标上仍存在差异。
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