I-Rod™ pipe supports

I-Rod™ is a half-round, high strength thermoplastic pipe support providing stand-off between the pipe and its support whilst minimising the contact crevice and insulating the pipe electrically.

Corrosion at pipe supports is one of the leading causes of process piping failures. Beam supports and saddle clamps have historically caused the majority of problems, with the following features often at the root of the failure:

       

  • Crevices forming at the pipe surface
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  • Water entrapment and constant contact with the pipe surface
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  • Poor access, hindering both inspection and basic maintenance — painting, NDT and visual inspection are often difficult, if not impossible
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  • Galvanic couples can form, providing enough potential to drive galvanic corrosion — even when both the pipe and the support are the same steel

The sequence of events leading to crevice corrosion are as follows:

       

  1. Water is trapped
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  3. The paint system fails (atmospheric coatings soften in immersion service)
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  5. Corrosion is initiated
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  7. Corrosion undercuts the paint film
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  9. Crevice corrosion starts
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  11. Pipe fails

I-Rod® is a durable thermoplastic, extruded and cut into a half-round rod. It is the key component in all of Deepwaters I-Rod® pipe supports. The way it works is simple:

       

  • The half-round shape minimizes contact between the pipe and the support, eliminating the crevice.
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  • It also provides an electrically isolated stand-off between the pipe and the supporting beam or saddle clamp. This allows for easy maintainence and inspection, while preventing galvanic corrosion between dissimilar metals (the pipe and support).
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  • I-Rod® also has excellent compressive strength, UV stability, and a very low friction coefficient. This makes I-Rod® ideal as a beam dressing, and pipe damage during new construction is reduced when I-Rod is present to assist in pipe fitting.