1. Coated fasteners: Carbon-steel U-bolts and nuts are available coated with hot-dipped galvanized or SermaGard™. ArmorGalv® is also available, as are 316 SS U-bolts.

2. I-Rod® material is a durable, half-round thermoplastic with high compressive strength and little-to-no creep over time. I-Rod® (white) can be used up to 181°F (83ºC), I-Rod® HT (amber) up to 340°F (171ºC) and I-Rod® PEEK (tan) up to 480°F (249ºC).

3. Choose gripping or non-gripping U-bolts: Gripping Nu-Bolts® do not allow pipe movement; Non-gripping Nu-Bolts® allow movement due to thermal expansion and contraction. XL Nu-Bolts® are non-gripping with slightly larger dimensions to prevent coating damage during pipe movement. 

4. Polyshrink™ is a UV-stable, cross-linked polyolefin applied over the shank of the U-bolt to protect the pipe’s coating during installation.  Standard Polyshrink™ temps: Up to 110ºC (230ºF); Hi-Temp: Up to 220ºC (428ºF).

Full MTRs are provided with every order to verify quality and origin.

Gripping vs non-gripping?

Non-gripping Nu-bolts® are designed to accommodate a nut or washer on top. The benefit of this arrangement is a better-secured piece of I-Rod® material for pipes that need to move or slide on the support. In addition, the nut and washer on top help shield the I-Rod® material at the ends from UV exposure.

Half-round shape: I-Rod's half-round shape minimizes contact between the pipe and the support, eliminating the crevice that traps water. Keeping water out minimizes corrosion.

Easier maintenance: A Nu-Bolt® assembly provides an electrically isolated stand-off between the pipe and the supporting beam or saddle clamp, which allows for easy maintenance and inspection. This also prevents galvanic corrosion between dissimilar metals of the pipe and support.

Durability: I-Rod® has excellent compressive strength and a very low coefficient of friction. Nu-Bolt® assemblies have been in continuous operation since 1989 without a single reported pipe failure.

Withstands extreme temperatures: With three materials to choose from, Nu-Bolt® is rated to perform in temperatures ranging from -110º F to 480º F.

Standard and custom sizes available

Nu-Bolt® is only available from Deepwater Corrosion Services and our licensed distributors and international resellers. Nu-Bolts® are sized to fit API standard pipe sizes. To order, we need to know:

1. Pipe size
2. Temperature requirements
3. Coating
4. Nuts and washers
5. Gripping or non-gripping

How to order Nu-Bolt LTR

I-Rod Catalog LTR

Download free CAD models of Nu-Bolt® assemblies for use in designing your next project. Hundreds of files in the most popular CAD formats are available.

Nu-Bolt® assembly specifications

Complete specifications for I-Rod® material, U-bolts and the Polyolefin heat shrink used in Nu-Bolt® assemblies are available on our specifications page.

I-Rod® material is the key to the Nu-Bolt's success. I-Rod® material has a high compressive strength and is subject to very little creep over time, so it can last 20 years or longer in the field.