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In the mid-1990s, Esso Canada started the process of “sleeving” Air-fin cooler tubes as a method of equipment life extension.

Since then, ExxonMobil has used this same technology in a number of their refineries worldwide — Singapore, Japan, Italy, United Kingdom, etc. — while plans are currently underway at a few of their U.S. plants.

For a list of CTI repairs, click here.

At the same time, other oil companies such as ARAMCO and BP entered into the Sleeving arena, both carrying out installations into their own coolers.

Sleeving can consist of a full-length tube liner, or — in cases of only tube-end erosion/corrosion — a short, metallic tube insert or "shield". Sleeving material ranges from 300 series stainless steel to nickel alloys, typically increasing the erosion/corrosion resistance to that of the finned, carbon steel, parent tubes.

Click here to read an in-depth “Looking at Liners” article.

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