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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Main products: precision steel tube, precision bright tube, precision seamless steel pipe.

主营：精密钢管、精密光亮管、精密无缝钢管。

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Seamless steel pipe, senior experts have pointed out that iron ore import qualified awarded can be used to conduct open and transparent manner, such as auction.

资深无缝钢管专家指出，铁矿石进口资质的颁发可用公开透明的方式进行，比如竞拍。

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The Luxembourg-based company said that results in the third quarter were affected by a lower level of sales of seamless pipe products and higher production costs.

FORBES: Magazine Article

Companies that supply the drillers were also among the buys, including seamless pipe maker Tenaris S.A. (nyse: TS - news - people ).

FORBES: Gurus Drop Goldman, Grab Energy

Luxembourg-based Tenaris sells seamless steel pipe products to oil and gas companies.

FORBES: Magazine Article