FREEZING SYSTEM PLUGS PIPELINE SEGMENTS FOR REPAIR

Sarnia Products Pipe Line, Waterdown, S Ont., a division of Imperial Oil Ltd., Toronto, recently located a pipeline leak in a 35-mile section between pumping stations by using a freezing tool to isolate sections of the line. This approach saved the time and money usually required if a line is cut and hydrostatically tested to find a leak. The segment isolated is part of a 170-mile, 12-in. pipeline between Sarnia and Toronto in southern Ontario carrying gasoline and distillates. A routine

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