No one was injured.
The fire was in an insulated gas pipe outside the paper mill between the power house and the pulp mill, Jay Fire Department Assistant Chief Mike Booker said Tuesday.
The pipe is part of a non-condensable gas pipeline, he said. It is about a 6-inch pipe with 2 inches of insulation over it and then aluminum coating.
Firefighters from Jay, Livermore and Livermore Falls fought the fire from ladder trucks and were assisted by the mill's firefighters, Booker said.
There was very little smoke coming from the 50-foot section of pipe when firefighters arrived, he said. They could see a little fire once they cut into the aluminum coating to get to the insulation. They pulled out the insulation, he said.
He estimated they were at the scene about three hours.