| ■ 管坯生產(chǎn)
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| ■ 制管
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圓管坯加熱 |
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穿孔 |
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軋管 |
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再加熱 |
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張力減徑 |
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冷卻 |
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矯直 |
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切定尺 |
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◆ 鍋爐管
◆ 結構管
◆ 輸送管
◆ 軸承管
◆ 油光管
◆ 接箍管 |
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| ■ 油井管加工
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熱處理 |
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熱矯直 |
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光管 |
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管端加厚 |
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無損探傷 |
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磷化 |
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車絲 |
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車絲 |
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螺紋檢驗 |
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管接頭擰緊 |
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水壓 |
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通徑 |
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