The operator of the world’s largest and most modern molten sulphur tanker has enjoyed four years of near-continuous service, thanks in part to the ship’s innovative thermal maintenance system. Sulphur Carriers, Inc., a subsidiary of International Shipholding Corporation, keeps M/V Sulphur Enterprise at sea hauling around 24,000 long tons of molten sulphur per trip. “We’ve had zero freeze-ups and zero maintenance associated with the bolt-on piping and valve heating system,” says Peter Johnston, Sulphur Carriers’ VP of operations. For reportedly the first time on any sulphur transport ship, a bolt-on heating system keeps the molten cargo flowing and the ship on schedule by preventing costly delays due to frozen pipes and valves.