The technology is studied on steel pipeline surface by hot spraying with oxygen natural gas.

研究了在钢质管道表面采用氧气—石油天然气火焰熔覆玻璃涂层的工艺。

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More and more epoxy powder has been used as external coating on buried steel pipeline at home in recent years.

近年来，国内埋地钢质管道的外覆盖层已越来越多地使用了环氧粉末。

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With joint protections of coating and cathode, the buried steel pipeline will still be corroded and penetraded on some pipe surfaces.

埋地钢质管道在防腐层、阴极防腐的共同保护下，钢管的某些区域仍会被腐蚀穿孔。

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Sirius proposes to process the ore at a site at Wilton, near Middlesbrough, and plans to transport it via a steel pipeline buried a minimum of 3ft 11in (1.2 m) below ground.

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Seeking to grow its energy base, Thailand has recently ordered the steel to build a third major gas pipeline, which in time would trigger development of 2 trillion cubic feet of undeveloped Unocal reserves.

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Plains Justice, a northern plains states public interest group, pointed out the first Keystone XL pipeline, which open last summer, was built with substandard steel from India.

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