FAQs
A round pipe resting on a flat support traps moisture that causes the pipe's paint to soften and fail. The trapped moisture then begins to corrode the bare steel and eat through the pipe wall, eventually causing extensive damage that can result in pipe failure.
When a round pipe is supported by I-Rod®, water can't be trapped against the pipe because I-Rod’s half-round shape minimizes the contact area and raises the pipe, allowing moisture to evaporate before it causes damage. Additionally, I-Rod® prevents contact between dissimilar metals and electrically isolates the pipe and support. The raised pipe also makes inspection of the contact area much easier.
I-Rod® thermoplastic is the white, half-round rod we use for all types of pipe supports, and that’s why we call the brand I-Rod®. A Nu-Bolt™ assembly is simply one form of an I-Rod® pipe support. The Nu-Bolt™ is one piece of I-Rod® fitted on a coated U-bolt with 4 nuts.
Go to our Nu-Bolt product page
No. It is a cross-linked, heat-shrinkable polyolefin material. Neoprene would have to be vulcanized to stick to the U-Bolt; as a result, it would deform too much and cause problems with moisture retention. The purpose of the heat-shrink is to minimize damage to the pipe coating during installation.
No. I-Rod® is a high-impact thermoplastic material. Teflon® and Delrin are commonly used to try to copy I-Rod®, but both fail, causing dangerous pipe corrosion. Teflon® does not function due to lack of compressive strength. To see examples of I-Rod® imitations made of Teflon® that have failed in the field, visit this site's blog section.
Standard I-Rod® (white) will perform at temperatures from -166°F (-110°C) up to 181ºF (83ºC). For higher operating temperatures, we offer I-Rod® HT (amber) for up to 340ºF (171ºC), and PEEK™ (beige), which withstands up to 480ºF (249ºC). Normally, at temperatures above 90°C (194°F), crevice corrosion is not a problem because moisture will evaporate. However, pipes are still susceptible to corrosion when temperatures drop. Standard I-Rod® will perform in environments that sometimes rise to 120°C (250°F) for short durations (less than 24 hours), but may experience some slight deformation at the contact area.
Depending on conditions, I-Rod® design life is conservatively estimated at 15-25 years. I-Rod’s tough, durable thermoplastic material will provide many years of protection against crevice corrosion, potentially longer than the operational life of many process piping systems. Since we have never had a reported I-Rod® failure, I-Rod's maximum life is still unknown. The first I-Rod® and Nu-Bolt™ assemblies were installed offshore by Exxon in the late 1980s. We had the opportunity to re-visit the platform for inspections after 13 years in service and again at 28 years after installation, and the I-Rod® was still performing well.
A test conducted by an independent laboratory in 2003 confirmed I-Rod's exceptionally good wear resistance. After simulating 27 years of movement, the I-Rod had minimal wear and had only worn through the top coating layer on the pipe, not yet getting into the primer. After 58 years, the I-Rod® had worn a bit more and worked through the pipe coating to the primer. At 125 years, the I-Rod® developed a small flat spot and had rubbed through the pipe's primer to bare metal.
No, not if the piping is correctly supported along its length. If there is noticeable sagging between support points, then the pipe is being overstressed and inadequately supported. Note: I-Rod® has been used on hundreds of thousands of pipe supports for over 30 years, and we have never seen a problem.
I-Rod® products are manufactured from extremely durable materials able to support enormous amounts of weight without creeping over time. While conducting offshore inspections, our technicians routinely discover imitations of I-Rod® that have broken or crushed, leaving pipes dangerously unprotected. If an engineer specifies genuine I-Rod®, that is precisely what is expected. Imitations are not necessarily equivalent and, while some can be slightly cheaper, the damage they can cause is a significant potential liability to assume. To prevent exposure to the costs of a dangerous pipe support failure, ensure that you’re getting genuine I-Rod®.
Every shipment of I-Rod® is traceable, and is sent with a certificate of authenticity. All I-Rod® is distinctly marked with our trademark and a unique batch number.
Our double-sided tape works well for initial fastening. Otherwise, it should be mechanically fastened to the beam or secured with I-Rod® adhesive:
I-Rod® Clip is used to line pipe shoes, saddle clamp-style supports and Grinnell clamps. Made of the same thermoplastic material (I-Rod® and I-Rod® HT), it is designed to prevent crevice corrosion at more substantial weight-bearing supports. It is available in sizes to fit standard Grinnell clamps and pipe cradles. It can also be custom-sized or pre-installed in Grinnell clamps.