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| Severely corroded hot oil pipes that were replaced. |
By Blair Slessor, Denso North America Inc.
While Denso North America Inc. is one of the country's largest suppliers of corrosion prevention products to the water, oil and gas transmission industries, its tapes are also used in the food industry. For many years the company has supplied petrolatum tapes and primers to food processors for use in pickling plants, protection of brine lines, as well as to refrigeration companies needing products for their cooling equipment.
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| Severely corroded hot oil pipes that were replaced. |
Recently, the company was called upon to supply products on a pipe-wrapping project involving high temperature edible oil lines. A processing plant, located in Ontario, required corrosion protection; it operates 24 hours a day, seven days a week. The oil products produced are high quality corn and canola oils that are mostly used on a commercial basis by restaurants for deep frying foods. Raw oil is brought into the plant via ship or rail car from Western Canada where it is processed and transported by a series of buried pipes to holding tanks several thousand feet from the plant.
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| Wrapping of Denso Hotline Tape on new pipes using rolling pipe support. |
With little opportunity for maintenance down time, the company needed a high quality, high temperature coating for their transportation lines that could be applied without major disruption and extensive delays in the plant. Due to severe corrosion of the existing piping, new pipe had to be installed. As well, the anti-corrosion coating had to be applied in a 48-hour time frame in order not to disrupt a nearby rail yard and personnel parking lot. Operating temperatures of these oil lines reached 200°F (93°C), well within the operating range of Denso Hotline Tape.
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| Connection of newly wrapped pipes coming from processing plant under railway tracks. |
The tape was applied to the new pipe sections on a rolling pipe support above the trench and, once the wrapping was complete, these were lowered into place and bolted to the next pipe section.
This project was completed well within the required two-day time frame with minimal disruption to the plant and surface operations.
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