Nu-Bolt™
Anti-corrosion pipe support assembly for I-beam supports

The Nu-Bolt has been in service in some locations for almost 20 years, without any reported failures.

Designed by corrosion engineers, the Nu-Bolt assembly combines the half round I-Rod support with a modified pipe U-Bolt. A variety of corrosion resistant treatments provide reliable, long term service in the severe operating environments associated with offshore oil and gas production and coastal process facilities.

Polyshrink is applied over the shank of the U-Bolt to protect the paint system during installation. Polyshrink is not designed to protect the U-Bolt. The material is a cross linked, high-compressive-strength, UV Stable polyolefin. It can remain in service in temperatures up to 230 °F (110 °C).

Coatings - The Bolt itself is available in 316 SS, or carbon steel with one of two coatings: Hot-Dip Galvanize, or SermaGard®. SermaGard is a corrosion resistant coating reliable in even the most harsh offshore conditions.

Half Round I-Rod Support - The standard I-Rod material works extremely well for most process piping conditions. In situations with extreme operating temperatures, Deepwater can substitute the more resistant I-Rod HT material. Deepwater has also begun to offer PEEK material for environments that prove too severe for either (though these instances are rather rare). For details about all three materials:

Related Technical Information

Corrosion at Pipe Supports - Causes and Solutions (Paper)

Abstract: Corrosion at pipe supports is one of the leading causes of process piping failure. This paper will discuss the various corrosion mechanisms that occur at pipe supports as well as the successful and unsuccessful attempts at controlling the problem.

Pipe Supports: A Nagging Corrosion Problem Solved (Article)

From Pipeline & Gas Journal: During routine inspections of offshore oil and gas production facilities in the Gulf of Mexico, corrosion on piping systems seems is prevalent. Deepwater's own I-Rod brand of pipe supports tackles this nagging problem with near perfect results ...

Nu-Bolt 13 Year Field Performance Study

The first structure to specify I-Rod pipe supports was inspected 13 years after original installation. The results are shocking - not a single Nu-Bolt had failed.

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Key design points

Half-round shape

The I-Rod's half-round shape minimizes contact between the pipe and the support, eliminating the crevice. Keeping water out keeps corrosion at bay.

Maintenance

The Nu-bolt assembly also provides an electrically isolated stand-off between the pipe and the supporting beam or saddle clamp. This allows for easy maintenance and inspection, while preventing galvanic corrosion between dissimilar metals (the pipe and support).

Durability

I-Rod also has excellent compressive strength and a very low friction coefficient. Some Nu-bolts have been in continuous operation since 1989 with no reported failures. See the 13-year study on one of the the first platforms to specify I-Rod for all of the structure's pipe supports.

How to order

Online ordering coming soon!

To order any of our I-Rod brand pipe supports, including I-Rod strips, Nu-Bolts or I-Clips, please contact Beverly at bclaflin@stoprust.com or call 713-983-7117 ext 222.