Piggable pipe problem
Piggable pipe problem
(OP)
During construction a welded seam is now obstructing the pig for the weld was too hot. Are there any ways that a type of pigs can smoothen the internal pipe surface? As there is welding drop I assume that a steel brush pig is not sufficient...





RE: Piggable pipe problem
I would make them cut it out and fix it. You are paying for a quality job wether it was an in house job or a contractor demand quality. I love welding so quality is a must on my projects, contractors may not like it but in the end I get my money's worth.
StoneCold
RE: Piggable pipe problem
RE: Piggable pipe problem
RE: Piggable pipe problem
RE: Piggable pipe problem
If poly pigs are coming in damaged, then I'd run "Turbo" pigs which are almost as forgiving as poly pigs but much more durable.
BTW I never run gauge plates because I wouldn't do anything with the data. Think about it, on a (say) 30 mile pipe you run a gauge plate that comes in beat up. Are you going to cut out every weld until you find the problem? Then how are you going to guarentee that when they make the line back up they don't do a worse job. I know that all of this cut-and-paste can be charged to the contractor, but you're building the line to move saleable product and while you're rebuilding the line you are not making money on it.
David Simpson, PE
MuleShoe Engineering
www.muleshoe-eng.com
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The Plural of "anecdote" is not "data"