How can I mend the milling of the cylinder?

Hello, there is a jar, diameter 1000mm, there is no manhole, the design drawings on the ring seam is an inner gap, an outer groove, the head has been processed according to the corresponding groove,
When the cylinder is broken, the cylinder can be milled into the outer groove. How should this be handled?
2017-07-03 Reply
1. re milling the wrong groove to see if there is a margin for the length of the cylinder
2. to see whether the head of the butt butt joint with the cylinder has a margin
3. in the welding time, as far as possible the gap between the weld point welding
4., again
2017-07-05 09:08:41 Reply
If there is no machining allowance, the opening of the wrong groove can be re opened to slope
2017-07-05 09:16:39 Reply