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Cause of third fire at Regina Co-op refinery explained

Mar 8, 2013 | 11:03 AM

A vent plug failed causing of a fire damaging buildings and equipment at the Co-op Refinery last month in Regina, the third significant fire at the refinery in the last year and a half.

The latest fire started around midnight Feb. 11 when a carbon steel vent plug failed because of sulfidation, a type of chemical reaction. The Regina Fire Department says this led to extreme pressure and extremely high temperatures which caused the fire.

Some witnesses described seeing flames up to 80 feet high and a lot of smoke that night.

Later that day, Vic Huard, Co-op's vice-president of corporate affairs, offered a bit more detail.

“Around 12:20 am there was a fire in a coker unit pump house here in section two of the refinery complex. That fire, through our standard operating procedure, triggered alarms… The fire was contained and extinguished by 1:00 am.”

Huard explained the coker unit pump had undergone minor maintainance at the end of January 2013, and again the first week of February. The last major maintainance turnaround was done in April of 2010. Another had been scheduled for April of this year.

That fire was fought by the refinery’s fire crews with the Regina Fire Department staged outside the facility. The blaze was contained in an area in the centre of the plant.

The two other fires have also been explained.

Back in October of 2011, an explosion erupted in a unit that was involved in processing diesel fuel. At least 10 people were injured in that blast, which was also responsible for $100 million in damage and lost productivity. It took nearly a year for the refinery and the fire department to reveal the cause for that blast, explaining that corrosion had left a pipe in a diesel-processing pipe thin-walled.

Another fire happened in May of last year in another pump house, triggering the evacuation of 350 contract workers. No one was injured.

news@panow.com