The age of the pipeline and the slow flow create a problem. Slow flow allows water to drop out and accumulate in low points between pigging. This is a point of corrosion over time.
The pipeline needs more feed into it to keep the flow up as the existing North Slope fields continue their declining production rates.
Opening up NPRA, ANWR and the offshore would help a lot.
What’s “feed”? some filler?
I presume that low flows contribute more to corrosion... exposing more air to the inner walls.