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发明公开
CN103451570A 一种适用于低温环境的油气输送用螺旋埋弧焊管及其制造方法 有权 转让

一种适用于低温环境的油气输送用螺旋埋弧焊管及其制造方法
摘要：
本发明公开了一种适用于低温环境的油气输送用螺旋埋弧焊管及其制造方法，所述钢管母材按照质量百分比由以下成份组成：C0.01～0.08、Si0.2～0.45、Mn0.8～1.8、Ni0.3～1.5、Mo0.1～0.3、Cr0.2～0.5、Cu0.1～0.3、Ti0.005～0.05、N0.001～0.005、Al0.005～0.05、P≤0.015、S≤0.002，余量为Fe和不可避免的杂质元素。所述钢管母材还包括B0.0001-0.0050％。本技术发明的有益效果是，采用本发明中的方法，可以有效的提高管线钢管母材和焊缝位置的冲击韧性，而不需要进行热处理。采用本发明生产的油气输送用螺旋埋弧焊接钢管，可以满足-40℃以上寒冷地区油气输送管线的建设需要。
摘要（英）：

The invention discloses a spiral submerged-arc welded pipe for oil and gas transmission suitable for low temperatures and a manufacturing method thereof. A base metal of the steel pipe comprises the following components in percentage by weight: 0.01-0.08% of C, 0.2-0.45% of Si, 0.8-1.8% of Mn, 0.3-1.5% of Ni, 0.1-0.3% of Mo, 0.2-0.5% of Cr, 0.1-0.3% of Cu, 0.005-0.05% of Ti, 0.001-0.005% of N, 0.005-0.05% of Al, less than or equal to 0.015% of P, less than or equal to 0.002% of S, and the balance of Fe and inevitable impurities. The base metal of the steel pipe also comprises 0.0001-0.0050% of B. The spiral submerged-arc welded pipe and manufacturing method thereof disclosed by the invention have the beneficial effects that by using the method disclosed by the invention, the impact toughness of the base metal and welded position of pipeline pipe can be effectively improved without heat treatment; and a spiral submerged-arc welded pipe for oil and gas transmission produced by using the method disclosed by the invention can satisfy the construction needs of oil and gas transmission pipelines at cold areas with a temperature of above minus 40 DEG C.

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