I built a bbq pit recently for a friend and am about to start a second one. On the first one I cut circles with my plasma and welded them in to cap the ends. Then I ground the welds. The end cap (circle I cut) I put flush with the end of the pipe so once ground down it was a sharp transition from the top of the pipe 90* down to the cap surface.

I see pro built pits that have lovely rounded edges like the one in the pic I'm including. How do they do this? Is there a cap they buy and weld on? This can't be hand ground. If it is, I can't grind this pretty and consistent.

Here's how I did mine:

Here's a 'pretty' one I want to emulate:

Thanks for your help!