Field case study

A field study of some I-Rod pipe supports 13 years after installaton

The following images were recorded in 2002 during a routine topside inspection of an offshore structure that was installed in 1989. This was the first offshore structure where the I-Rod system was specified for new construction. The total added cost of this system was less than $10,000 USD. The following pages demonstrate the success of the system, which has subsequently been used on thousands of offshore structures.

Photos

Case 1: A typical Nu-Bolt? on a vertical section of a flow line.

A Typical Nu-Bolt? on a vertical section of a flow line

Case 2: More Nu-Bolts. No crevice corrosion has occurred.

Nu-Bolts prevent crevice corrosion from occurring

Case 3: This fuel gas line is always wet (the green coloration is mold) and the beam paint system has failed, but no corrosion has occurred at the pipe support.

This fuel gas line is always wet (the green coloration is mold)

beam paint system has failed, but no corrosion has occurred at the pipe support

Case 4: I-Rod used to dress beams, accommodating multiple pipes; no crevice corrosion.

I-Rod used to dress beams

IRod dressing multiple beams with no crevice corrosion

Case 5: More beam dressing on a typical pipe rack. This is 1-inch I-Rod.

More beam dressing on a typical pipe rack. This is 1 inch I-Rod

close up of a pipe support with I-Rod

Case 6: Installed under pig launch / receive barrel, bolted to support beams.

I-Rod Installed under pig launch and recieve barrel

IRod bolted to support beams

Case 7: Drip point (ell corrosion) – crevice corrosion at support is less than on girth weld. Without I-Rod, this would have been a failure point.

Drip Point (Ell corrosion) – Crevice corrosion at support is less than on girth weld

Without I-Rod, this would have been a failure point.

Case 8: I-Rod is particularly effective on small-diameter screwed piping. This piping has the highest $/sq. ft maintenance cost.

I-Rod is particularly effective on small diameter screwed piping

Case 9: More wet pipeline – largest diameter. The Nu-Bolt is providing reliable corrosion control.

I-Rod installed on more wet pipeline with a large diameter

The Nu-Bolt is providing reliable corrosion control