| ■ 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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