法兰内孔管件内孔必须倒角焊接。

Flange hole inside the tube must be chamfered hole welding.

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主营产品：钢管，无缝钢管，弯头，法兰，三通，管帽，大小头，管件。

Porduct: steel pipe, elbow, flange, tee, reducer, pipe cap, pipe fitting.

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我们常用弯头（弯管、法兰、三通、大小关）作为一种管件。

We usually use elbow( bend, flange, tee, reducer) as a kind of pipe fitting.

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我们常用弯头（弯管、法兰、三通、大小关）作为一种管件。

We usually use elbow( bend, flange, tee, reducer) as a kind of pipe fitting.

youdao