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Pigging for CRA clad pipeline

Pigging for CRA clad pipeline

Pigging for CRA clad pipeline

(OP)
Anybody have experience on pigging for CRA clad pipeline? Currently my understanding is that the actual procedure is the same as pigging of a carbon steel but the pig type need to be compatible with the clad but is such pig available? Our line is cladded with 316L and the purpose of the pigging is for liquid managment. Type of pig to be used is by-pass.

Appreciate the inputs.

Kind Regards

RE: Pigging for CRA clad pipeline

I would use a TurboPig for CRA. Not sure why you would ever use a bypass pig for "liquid management". I've selected brands of smart pigs because they had a bypass to keep the speed in a narrow range, but for dewatering it seems like it would defeat your purpose.

For CRA, I try to avoid metal parts like shafts, bolts, and brushes. The turbo pigs get the same sweep efficiency as a mandrel pig. I haven't been as happy with poly-coated foam pigs because after the second run you are starting to lose foam through tears. I've run the same turbo pig once a week for several years and while it starts looking kind of sketchy after the 10th or 20th run, it still seals and still works.

David Simpson, PE
MuleShoe Engineering

"Belief" is the acceptance of an hypotheses in the absence of data.
"Prejudice" is having an opinion not supported by the preponderance of the data.
"Knowledge" is only found through the accumulation and analysis of data.
The plural of anecdote is not "data"

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