Nu-Bolt™
Coated U-bolt with Half-Round I-Rod® Support Designed to Prevent corrosion at Pipe supports
Eliminate crevice corrosion at the support
Nu-Bolt assembly combines our half-round I-Rod support with a heat-shrink-coated U-bolt to provide long-term service in the harsh operating environments.
Nu-Bolt assemblies have been in worldwide service for over 25 years without a single reported pipe failure.
I-Rod® Prevents Corrosion at Pipe Supports
What is a Nu-Bolt?
1. I-Rod Material
I-Rod Material is a durable half-round thermoplastic.
> high compressive strength
> little to no creep over time
2. Polyshrink
Polyshrink is a UV-stable, cross-linked polyolefin applied over the shank of the U-bolt to protect the pipe's paint during installation.
> Standard: up to 110°C
> High-temp: up to 220°C
3. Coated Fasteners
Carbon-steel U-bolts and Nuts are available with the following coatings:
> Hot-dip galvanized
> SermaGard®
> DOX Nickel Cobalt
316 SS is also available.
4. Domestic Steel
Nu-Bolts are made from only the best quality domestic steel.
> non-China
> non-India
Full MTRs are provided with every order to verify quality an origin.
I-Rod® Material
I-ROD IS A SPECIAL TYPE OF PLASTIC
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 up to 20 years in the field.
Tech Datasheet
I-Rod vs Alternatives
Specifications
Nu-Bolt Assembly specifications
Complete specifications for I-Rod Material, U-bolts and the Polyolefin heat shrink used in Nu-Bolt assembly are available on our specifications page.
I-Rod Tech Datasheet
Nu-Bolt Tech Datasheet
Key Design Points
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.
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.
Durable
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.
Extreme temperatures
With three materials to choose from, Nu-Bolt is rated to perform in temperatures ranging from -110º F to 480º F.
Nu-Bolt Options
Polyshrink
Three options for polyshrink are available:
> Standard: up to 230°F / 110°C
> High-temp: up to 428°F / 220°C
> No Shrink
U-Bolt & Fastener Coatings
A36 and 316SS Domestic steel U-bolts can be coated with the following coating options:
> Hot-dip Galvanize
> SermaGard
> DOX Nickel Cobalt
I-Rod Material
With three materials to choose from, Nu-Bolt is rated to perform in temperatures ranging from -110º F to 480º F.
> I-Rod (white) up to 181°F
> I-Rod HT (amber) up to 340°F
> I-Rod PEEK (tan) up to 480°F
Non Gripping Nu-Bolts
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 shield the I-Rod Material at the ends from UV exposure.
Non-Gripping Info
I-Rod FAQ
How to Order Nu-Bolt
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
I-Rod Catalog
Gallery
Onshore large diameter pipe
This Nu-Bolt was installed on a midstream pipeline near previous repair work caused by a support that didn't use Nu-Bolt.
Nu-Bolt and I-Rod
Galvanized, Sermagard and 316 SS U-bolts with the three types of I-Rod: standard (white), HT (amber) and PEEK (tan).
Nu-Bolt offshore
Nu-Bolt began as an offshore product, but has since been specified by all major onshore and offshore operators.
High compressive strength
One piece of I-Rod can support up to 10,000 lbs of weight at a single point.
Batch numbering
There are a lot of imposters out there pretending to be I-Rod. Make sure you have a genuine C of C from Deepwater and that the batch number is clearly visible.
