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■ 管坯生产 ...................................................................................................
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■ 制管 .........................................................................................
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圆管坯加热
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穿孔
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轧管
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再加热
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张力减径
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冷却
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矫直
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切定尺
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◆ 锅炉管
◆ 结构管
◆ 输送管
◆ 轴承管
◆ 油光管
◆ 接箍管
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■ 油井管加工 ...................................................................................
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热处理
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热矫直
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光管
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管端加厚
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无损探伤
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磷化
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车丝
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车丝
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螺纹检验
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管接头拧紧
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水压
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通径
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