U.S. probe cites "ineffective" safeguard in Husky oil refinery blast

An "ineffective" safeguard failed to prevent an explosive mixing of air and fuel at a Husky Energy refinery in Superior, Wisconsin, leading to a blast and fire in the plant's gasoline-producing unit in April, a U.S. industrial safety group said on Wednesday.

from Reuters: U.S. https://ift.tt/2RUS5DQ