Use of Deepwater I-Rod / NuBolt System - Potential for Static Build-Up

[Fuzzbox 100]

We've been specifying and using the proprietary Deepwater I-Rod and NuBolt system as an aid in minimising crevice corrosion at pipe support locations. Generally successfully.

https://stoprust.com/i-rod-pipe-supports/

But a question has arisen with regards to possible static build-up (due to the lack of metal to metal contact at the support and an 'earth path' to ground being available through the support), particularly when pumping non-conductive liquids such as LPG.

Flanges are cross bonded (from one flange to the next) using copper strips at bolt locations and flow velocities are <3ms so I don't believe that there is a static problem but I'd be interested in the views of other users of these items.

 

[LittleInch]

Just earth the pipe at regular intervals, say every 500m and you'll be fine, especially if you cross bond the flanges.

Using supports as an earth is not reliable

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