Well if they do machine it then they're going to take off the hardened surface p... | Hacker News

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		jordanb on Dec 17, 2016 \| parent \| context \| favorite \| on: Chinese smiths forge a large flange on the street ... Well if they do machine it then they're going to take off the hardened surface put on by forging. Maybe that doesn't matter for a pipe flange. But that would also take a gigantic lathe, given the backyard nature of their forging setup I'd be interested to see how they do that.

tensor on Dec 17, 2016 [–]

They show the machining in stills at the end of the video. The also show that it meets the specs with high precision.

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