Not only safer but with a vastly superior final product.
Those flanges being made with the Chinese hammer are extremely crude. You can see the roughness of the surface in the final shot. Welding them onto the end of the pipe will require lots and lots of filler, and the mating surface will require a very thick gasket.
Also LOL at the guy checking for diameter and roundness by measuring in two different spots with a tape measure.
They are shaved down on a lathe at the end, then tested for conformance. The end product looked very 'high tech'.
I don't know if the method has any significant effect on internal defects relative to the safer method though.
Are you saying it doesn't get machined down on all surfaces? I can imagine there being less waste and higher yield on the more controlled process, but could you explain how the final product is any different?
Those flanges being made with the Chinese hammer are extremely crude. You can see the roughness of the surface in the final shot. Welding them onto the end of the pipe will require lots and lots of filler, and the mating surface will require a very thick gasket.
Also LOL at the guy checking for diameter and roundness by measuring in two different spots with a tape measure.