Welding inside 18" and 20" Diameter pipe
Welding inside 18" and 20" Diameter pipe
(OP)
I have a situation on one of my sites as the contractor was found welding inside a 20" pipe. The weld point is 2.7m from the edge of the pipe while the other end is inaccessible due to installed ISO Bundle. This in my view is an unsafe act, However to advise the contractor on the issue I am looking for standards that supports my action.
Could anyone advise such standards.
Best regards,
'Dunme.
Could anyone advise such standards.
Best regards,
'Dunme.





RE: Welding inside 18" and 20" Diameter pipe
Now depending upon which code you are welding to there may be some references to "back welding" inside of pipe. However, I believe API 1104 allows some back welding. I know of some instances of Operating companies allowing back welding down in pipe sections as far as 1100 feet.
This may not have been the response you were looking for but that's what I know.
ODEM
RE: Welding inside 18" and 20" Diameter pipe
saludos.
a.
RE: Welding inside 18" and 20" Diameter pipe
Richard A. Cornelius, P.E.
WWW.amlinereast.com
RE: Welding inside 18" and 20" Diameter pipe
RE: Welding inside 18" and 20" Diameter pipe
RE: Welding inside 18" and 20" Diameter pipe
Pipeline inspection, mainly water line, and repair was also done by people on wheeled dollies. After inspection if the line need to cement lined the lining machine was run a man. The longest section we inspected and lined was 2000' portal to portal.
Anecdotal:
There was a weld repair at one power house that required that the welder be lowered 110' by his ankles to repair a 30" weld. All the Little People welders that I knew all drove either a Cadillac or Lincoln. Mostly they had people drive for them, their wives.
RE: Welding inside 18" and 20" Diameter pipe
Quality might be another issue- it gets very awkward doing the work in a spot like that. I suppose it would help if you could rotate the pipe around while you welded.