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CTI SHIELD/SEAL™
U.S. PATENT #4,941,512 |
In 1976, CTI developed an advanced repair technique that today is recognized as the most widely used cost-effective system in the world. The CTI Shield/Seal™, is a thin-walled metallic tube insert made of highly durable alloys.
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The Shields, also known as ferrules, are expanded – either mechanically, hydraulically or a hybrid of the two – into existing damaged tube ends, adding years of service to the equipment. Shields may be used for exchanger tubes suffering from:
- Tube-end erosion/corrosion
- Stress Corrosion Cracking
- Crevice corrosion
- Localized pitting
- Ammonia grooving
- Improper tube expansion
- Weakened tube-to-tubesheet joints
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Choosing the proper alloy of the Shield is critical. Selection is based on existing tube materials, the service of the HX, and the cause of the tube failures. Typically, the Shield alloy selected is superior, but galvanically compatible, to that of the existing tubes.
Materials available range from:
- Copper Alloys (Brass, 90/10, & 70/30 CuNi)
- Stainless Steel (Austinetic, Ferritic, Duplex)
- Nickel based (C-276, Alloy 400 & 600, Ni 200, etc.)
- High Temperature (310S, 316H, etc.)
- And many more...
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An extensive inventory is maintained to accelerate response time for customer requirements.
The installation of Shields into new exchangers is becoming more and more popular. OEM's have called on CTI for Shields that will allow years of additional service life to the exchanger at a relatively low cost. Haldor Topsoe, for example, has recently included the use of CTI Shields into their design of new waste heat boilers.
Since 1976, CTI has installed over 6 million Shields in over 35 countries for electric utilities, refineries, chemical plants, and commercial marine. The United States Navy alone has installed over a half-million CTI Shields into condensers and heat exchangers spread across 60 ships.
This repair technique is not a "band-aid" repair but a true restoration that, in some instances, has extended the life of the exchanger by more than twenty years...
WHY REPLACE THE ENTIRE TUBE WHEN ONLY THE FIRST FEW INCHES NEED REPAIR?
From steam condensers to HP Feedwater heaters, CTI has the answer that will SAVE YOU MONEY. Don’t take our word for it, view our customer list or, better yet, contact CTI for references and you can reach our customers directly. |
CTI Industries, Inc. is a service company that specializes in steam condenser repair and heat exchanger repair. Our tube repair technique using the unique CTI Shield/Seal™ is the most widely used and cost-effective system in the world. CTI services the electric utility, refinery, chemical, petro-chemical, commercial marine, U.S. Navy, paper mill, fertilizer, desalination and other industries in over 35 countries throughout the world.
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CTI Industries,Inc.
283 Indian River Rd | Orange,CT 06477
Phone: 203-795-0070 | 1-800-446-0060 (USA)
Fax: 203-795-7061
ctius@cti-ind.com |
Copyright 2008 CTI Industries, Inc.
Website Design by IMG Creative |
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