Hi,

I am hoping some of you more experienced guys may be able to give me a hand.

What methods and techniques are used to break into pipelines?
I know that the easiest way would be to a blind flanged tie-in point or if a line is to be modified post a flange/valve then it is easiest to make a new spool between two flanges.

my question relates to when you have to put a new tie-in into a pipeline and the above isn’t viable, i.e. there is no option but to break into the line. I told one option on a gravity drain line for example would be to cut the line then put a bung into the pipe to stop drains backing up, make up the new spool then weld them back together. With piping I am aware it isn’t always as simple as this as sometimes welding isn’t an option either.

I know you could also use an o’let for branching.

Hope you can see what I’m getting at.